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SHOP MANUAL
NHSOaeroBO

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  • Page 1 SHOP MANUAL NHSOaeroBO...
  • Page 2 OBLIGATION WHATEVER. NO PART OF T H I S PUBLICATION MAY BE REPRODUCED WITHOUT W R I TTEN P E R ­ M I SSION. HONDA MOTOR CO., LTD. Service Publications Office Date Issue: May, 1983 © HONDA MOTOR CO.,...
  • Page 3: Table Of Contents

    SERVICE RULES 1. Use genuine HONDA or HONDA·recommended parts and lubricants or their equivalents. Parts that do not meet HONDA's design specifications may damage the scooter. 2. Use the special tools designed for this product.
  • Page 4: Model Identification

    The engine serial number is stamped on the back of the The color label is attached to the left side of the fuel tank, crankcase near the rear wheel. under the seat. 1983 Date of Issue: May, 1 - 2 ©HONDA MOTOR CO., L TO.
  • Page 5: Specifications

    55 ° BBDC Open Scavenge Close 55 ° ABDC Engine dry weight 18 kg (39.7 lb) ± 1,800 1 0 0 rpm Idle speed 1 -3 Date of Issue: November, 1983 Rights Co., Inc. 1983 © American Honda Motor - All Reserved...
  • Page 6 Speedometer light SAE No. 57 Oil indicator light 12V-2 cp SAE No. 57 Turn signal indicator 12V-2 cp SAE No. 57 High beam indicator 12V-2 cp Date of Issue: May, 1 983 1 -4 © HONDA MOTOR CO., L TO.
  • Page 7: Torque Values

    8 mm flange bolt and nut 20-30 (2.0-3.0, 14-22) 30-40 (3.0-4.0, 22-29) 50-60 (5.0-6.0, 36-43) 1 0 mm flange bolt and nut bolt and nut 30-40 (3.0-4.0, 22-29) Date of Issue: May, 1 983 1 - 5 © HONDA MOTOR CO., LTD.
  • Page 8 OT 7 16-0020500 Extension bar 1 2·7, 1 2-8 Fork seal driver 07747-0010100 12-23 07947-3550000 Fork seal driver attachment 077 4 7 ·00 1 0400 1 2·23 Date of Issue: May, 1983 1 -6 © HONDA MOTOR CO., L TO.
  • Page 9: General Information

    • Wire harnesses routed along the handlebars should not be pulled tight, have excessive slack, be pinch­ or interfere with adjacent or surrounding parts in all steering positions. Date of Issue: May, 1983 1 - 7 ©HONDA MOTOR CO., LTD.
  • Page 10 GENERAL INFORMATION SPEEDOMETER CABLE SPEEDOMETER REAR BRAKE CABLE JUNCTION BOX MAIN HARNESS REAR BRAKE CABLE SPEEDOMETER CABLE Date Issue: May, 1983 1 -8 © HONDA MOTOR CO., LTD.
  • Page 11 CONTROL CABLES THROTTLE CABLE FUEL GAUGE SENSOR R ESISTOR O I L LEVEL STARTER RELAY INDICATOR SWITCH OIL CONTROL CABLE IGNITION COIL TURN SIGNAL RELAY REAR BRAKE CABLE Date of Issue: May, 1983 1 -9 © HONDA MOTOR CO., LTD.
  • Page 12 LUBRICATION OIL TANK OIL PUMP O I L STRAINER CARBURETOR INTAKE PIPE Date of Issue: May, 1983 2 - 0 © HONDA MOTOR CO.,...
  • Page 13: Service Information

    • Bleed air from the oil outlet line (from the oil pump to the carburetor) if the line is disconnected. SPECIFICATIONS Engine oil recommendation: Honda 2-stroke oil or equivalent Final reduction oil capacity: 90 cc (0.09 Final reduction oil recommendation:...
  • Page 14 • Lubri c ate the pump gear and O·ring with • clean grease before installation. Make sure that the oil pump is inserted into the crankcase properly. Date of Issue: May, 1983 2 - 2 © HONDA MOTOR CO., L...
  • Page 15: Oil Pump Bleeding

    After installation, make sure there is no air in the oil inlet line. CAUTION: Bleed air from the oil outlet line after bleeding the oil inlet line and oil pump. Date of Issue: May, 1983 2 - 3 © HONDA MOTOR CO., L TO.
  • Page 16 · ciem lubrication. Excessive white smoke or hard starting: Pump control lever excessively open • Seized piston: • Pump control lever not properly ad INDEX MARK PROJECTION Date Issue: May, 1983 2 - 4 © HONDA MOTOR CO., L...
  • Page 17: Final Reduction Oil

    Fill the final reduction case up to the proper level with recommended oil. (0.09 US OIL CAPACITY: I L or SPECIFIED OIL: HONDA 4·STROKE O DRAIN BOLT equivalent, 10W-40 CONTROL CABLE LUBRICATION Periodically disconnect the throttle, oil control and brake cables at their upper ends.
  • Page 18 (HONDA 4-STROKE O I L -� OR EQUIVALENT, 10W·40) FOOT PEG -� WHEEL PIVOT BEARINGS ANAL SHAFT -� -� BEARINGS SPEEDOMETER CENTER DRIVE GEAR STAND PIVOT Date of Issue: May, 1983 2 - 6 © HONDA MOTOR CO., L TO.
  • Page 19 21 ( 1 50, 1.5) 24 ( 1 75, 1.75) Cold tire pressure psi (kPa, kg/cm2) 90 kg (200 lbs) load and 21 ( 1 50, 1.5) 36 (250, 2 up to vehicle capacity load Date of Issue: May, 1983 ©HONDA MOTOR CO., LTD.
  • Page 20: Maintenance Schedule

    3-11 3·12 STEERING HEAD BEARINGS * SHOULD BE SERVICED BY AN AUTHORIZED HONDA SCOOTER DEALER, UNLESS THE OWNER HAS PROPER TOOLS AND SERVICE DATA AND IS MECHANICALLY QUALIFIED. •• IN T H E INTEREST OF SAFETY, WE RECOMMEND THESE ITEMS BE SERVICED ONLY BY AN AUTHORIZED HONDA SCOOTER DEALER.
  • Page 21: Fuel Filter

    Do nor smoke or allow flames or sparks in your working area. Install the fuel filter with the arrow in the normal direction of fuel flow. After installing, check that there are no fuel leaks. Date of Issue: May, 1983 CO., LTD. ©HONDA MOTOR...
  • Page 22 ADJUSTER LOC NUT SPRING CLIP AIR CLEANER A I R CLEANER CASE COVER Remove the left frame cover. Remove the spring clip and remove the air cleaner case cover. Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 23 Soak the element in clean motor oil (SAE 10W-40) or gear oil (#80-90) and squeeze out excess. Reinstall the carburetorchoke cleaner element and CARBURETORCHOKE CLEANER chamber, and clamp the chamber in position. CHAMBER Date of Issue: May, 1 983 3 - 5 © HONDA MOTOR CO., L TO.
  • Page 24 ENGINE OIL STRAINER SCREEN Remove the frame center cover (Page 1 1·3). Disconnect the oil inlet line at the oil pump and allow the oil to drain into a clean container. Date of Issue: May, 1 983 © HONDA MOTOR CO., L TO.
  • Page 25: Carburetor Idle Speed

    Warm up the engine and place the scooter on its center stand. Turn the throttle stop screw as required to obtain the specified idle speed. IDLE SPEED: 1,800± 100 Date of Issue: May, 1983 3 - 7 © HONDA MOTOR CO., L TO.
  • Page 26: Brake Shoe Wear

    BRAKE SHOE WEAR Replace the brake shoes if the arrow on the brake arm aligns with the reference mark when the "6" brake is fully applied. Date of Issue: May, 1983 © HONDA MOTOR CO., L TO.
  • Page 27: Brake System

    AOJUST f\UT R E A R B R A K E Measure the rear brake lever free play a t the tip o f the brake lever. FREE (3/8-3/4 PLAY: 10-20 Date of Issue: May, 1983 ©HONDA MOTOR CO., LTD.
  • Page 28: Parking Brake

    An improperly adjusted headlight may blind oncoming drivers, or it may fail to light the road for a safe distance. 1983 Date of Issue: May, 3 - 1 0 ©HONDA MOTOR CO., LTD.
  • Page 29 Up to 1200 1.5) (175, 1.75) lbs) load (150, Cold tire pressure (200 psi (kPa, lbs) (150,1.5) !250, 2.5) kg/em•) and up to vehicle capacity load Date of Issue: May, 3 - 1 1 1983 © HONDA MOTOR CO., LTD.
  • Page 30 (Page 1 2·24). Date of Issue: May, 1983 3 - 1 2 © HONDA MOTOR CO., LTD.
  • Page 31 F U E L SYSTEM F U E L TANK FUEL TUBE FUEL STRAINER VACUUM TUBE Date Issue: May, 4 -0 1983 © HONDA MOTOR CO., L TO.
  • Page 32: Fuel System

    7. Clogged air vent tube 7. Intake pipe leaking 1. Faulty float valve 8. Clogged fuel strainer 8. Fuel contaminated 2. Float level too high 3. Carburetor jets clogged Date of Issue: May, 1983 4 - 1 © HONDA MOTOR CO., LTD.
  • Page 33 Disconnect the throttle cable from the throttle valve. TH ROTTLE VALVE TH ROTTLE CABLE SEALING CAP CARBURETOR TOP Remove the throttle valve spring, carburetor top and sealing cap. THROTTLE VALVE SPRING Date of Issue: May, 4 - 2 1983 © HONDA MOTOR CO., L...
  • Page 34: Carburetor Removal

    CARBURETOR REMOVAL Remove the right and left frame covers. Loosen the drain screw to drain fuel from the carbu­ retor. DRAIN SCREW Remove the air cleaner element. Date of Issue: May, 1 983 4 - 3 ©HONDA MOTOR CO., LTD.
  • Page 35 NOTE: Remove the frame center cover for easy re· moval of the attaching bolts if necessary. Disconnect the control box and bystarter tubes from the carburetor. FUEL TUBE BOLTS Date of Issue: May, 1983 © HONDA MOTOR CO., L TO.
  • Page 36 VALVE SEAT F LOAT/FLOAT VALVE INSPECTION Check the valve seat for wear or damage. Check the float for deformation or fuel inside the float. FLOAT FLOAT VALVE Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 37 Perform air screw adjustment if a new air screw is in· stalled (Page 4·1 NOTE: Do not install a new limiter cap on a new air screw head until after adjustment has been made. Date of Issue: May, 1983 4 - 6 © HONDA MOTOR CO., L TO.
  • Page 38: Float Level Inspection

    Connect the control box and bystarter tubes to the carburetor. Install the carburetor and connect the fuel tube. Install the frame center cover if it was removed. FUEL TUBE CARBURETOR Date of Issue: May, 1983 4 - 7 © HONDA MOTOR CO., L TO.
  • Page 39 Install the right left frame covers. Perform the following adjustments and operation: Throttle cable free play adjustment (Page 3·4). • 2·4). • • Oil pump adjustment (Page (Page Idle speed adjust ment 3·7). Date of Issue: May, 1983 ©HONDA MOTOR CO., LTD.
  • Page 40 THROTTLE STOP SCREW Tighten the carburetor top. CARBURETOR TOP Install the left frame cover. Adjust the throttle cable free play (Page 3·4). Date of Issue: May, 1 983 4 - 9 © HONDA MOTOR CO.,...
  • Page 41 Warm the engine up to operating temperature. Stop and go riding for minutes is sufficient. Connect a tachometer and adjust the idle speed with the throttle stop screw. IDLE SPEED: 1,800 100 rpm ± 1983 Date of Issue: May, 4- 1 0 ©HONDA MOTOR CO.,...
  • Page 42: Emission Control

    Attach Emission Control Information Label Update as shown. NOTE: Do not attach the label to any part that can easily removed from the vehicle. 1983 Date of Issue: May, 4 - 1 1 © HONDA MOTOR CO., L TO.
  • Page 43: Reed Valve

    I f the stopper, reed or valve seat is faulty, replace them as a unit. INSTALLATION This installation sequence is essentially the reverse order of removal. After installation, check for secondary leaks. Date of Issue: May, 1983 4 - 1 2 © HONDA MOTOR CO., LTD.
  • Page 44 • Clean the vacuum tube with compressed air. AUTO F U E L VALVE Date of Issue: May, 1983 4- 1 3 © HONDA MOTOR CO., L...
  • Page 45 E N G I N E REMOVAL/INSTALLATION 30-40 N·m {3.0-4.0 kg·m. 22-29 ft·lb) 27-33 N·m {2.7-3.3 kg·m. 20-24 ft·lb) Date of Issue: May, 1983 © HONDA MOTOR CO LTD. .•...
  • Page 46 27-33 N·m (2.7-3.3 kg·m, 20-24 ft·lb) Rear shock absorber upper mounting bolt 30-40 N·m (3.0-4.0 kg·m, 22-29 ft·lb) Rear shock absorber lower mounting bolt 20-30 N·m (2.0-3.0 kg·m, 1 4-22 ft·lb) Date of Issue: May, 1 983 5 - 1 © HONDA MOTOR CO., LTD.
  • Page 47: Engine Removal

    Remove the spark plug cap from the spark plug. PLUG CAP Remove the alternator and starter coupler and con­ COUPLER AND CONNECTORS nectors. LTD. Date of Issue: May, 5- 2 1 983 © HONDA MOTOR CO.,...
  • Page 48 Disconnect the vacuum tube and fuel line. FUEL LINE VACUUM TUBE Disconnect the rear brake cable. CABLE CLAMP CABLE SET PLATE BRAKE CABLE Remove the rear shock absorber. REAR SHOCK ABSORBER 1983 Date of Issue: May, © HONDA MOTOR CO., LTD.
  • Page 49: Engine Installation

    Wire and cable routing (Page 1·8, 1 -9) • Throttle cable (Page 3-4) • Oil control cable (Page 2·4) • Oil pump bleeding/priming (Page 2-3) • Rear brake adjustment (Page 3-9) Date of Issue: May, 1 983 © HONDA MOTOR CO., L TO.
  • Page 50 HONDA NHSO CYLINDER HEAD/CY LINDER/PISTON 8-12 N·m (0.8-1.2 6-9 ft-lb) kg-m, 6 -0 1 983 Date Issue: May, LTD. © HONDA MOTOR CO.,...
  • Page 51 1. Worn, stuck or broken piston rings Faulty reed valve Worn or damaged cylinder Compression too high, overheating or knocking Excessive carbon build-up in cylinder or on pis­ ton top 1983 6 - 1 Date of Issue: May, © HONDA MOTOR CO., LTD.
  • Page 52: Cylinder Head

    SHOCK ABSORBER Remove the air cleaner case/rear fender. A I R CLEANER CASE/REAR F E N D E R Remove engine shroud A . SHROUD A 6 - 2 Date of Issue: May, 1 983 © HONDA MOTOR CO., LTD.
  • Page 53 C Y L I N D E R HEAD I NSPECTION Check the cylinder head for warpage with a straight edge and a feeler gauge in the directions shown. SERVICE LIMIT: 0.10 (0.004 Date of Issue: May, 1983 6 - 3 © HONDA MOTOR CO., LTD.
  • Page 54 Do not damage or scratch the piston. • Do not apply side force to the connecting rod. • not let the clip fall into the crankcase. PISTON PIN PISTON PIN CLIP Date of Issue: May, 1983 6 - 4 © HONDA MOTOR CO., LTD.
  • Page 55 Do not scratch or score the cylinder and pis­ Inspect the cylinder bore for wear at three levels in and Y directions. Use the largest measurement to determine the cylinder wear. 48.050 mm (1.8917 SERVICE LIMIT: 1 983 Date of Issue: May, ©HONDA MOTOR CO.,...
  • Page 56 PIN HOLE 1.0. 1.0. Measure the piston SERVICE LIMIT: 12.025 (0.4734 in) PISTON PIN 0.0. Measure the piston pin O.D. SERVICE LIMIT: 1 1 .980 mm (0.4717 in) Date of Issue: May, 1983 6 - 6 MOTOR CO., © HONDA LTD.
  • Page 57 A ring that will not compress means that the ring groove is dirty or that the ring is in the wrong groove. Date of Issue: May, 1983 6 - 7 © HONDA MOTOR CO., LTD.
  • Page 58 Coat the needle bearing and piston pin with 2-stroke oil. Install the needle bearing in the connecting rod, and install the piston mark facing the exhaust "EX" side. Install new piston pin clips. Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 59 2·stroke oil com­ with and install the cylinder over the piston while pressing the piston rings. CAUTION: A void damaging the sliding swface o f the pis­ ton. Date of Issue: May, 1983 6 - 9 © HONDA MOTOR CO., LTD.
  • Page 60 Install all removed parts in the reverse order of re­ moval. Perform the following inspections: • Compression test (Page 3-8) • Check for any abnormal engine noise. • Check for cylinder air leaks. Date of Issue: May, 1983 6 - 1 0 © HONDA MOTOR CO., LTD.
  • Page 61 ALTER NATOR Date of Issue: May, 1983 7 - 0 © HONDA MOTOR CO.,...
  • Page 62 See Section 1 5 for alternator inspection. TORQUE VALUE Flywheel 35-40 N·m (3.5-4.0 kg-m, ft·lb) 25-29 TOOLS Common 077 33-0010000 or 07933-0010000 Rotor puller Universal holder 07725-0030000 Date of Issue: May, 1983 7 - 1 © HONDA MOTOR CO., LTD.
  • Page 63 Remove the right floor board. Attach the universal holder to the flywheel. Hold the flywheel and remove the flywheel 1 0 mm flange nut. 10 mm FLANGE NUT Date of Issue: May, 1983 7 - 2 © HONDA MOTOR CO., LTD.
  • Page 64 Remove the two bolts attaching the stator and re· move the stator. NOTE: • Do not remove the pulse generator from the stator base. • Avoid damaging the stator coils. Date of Issue: May, 1983 7 - 3 © HONDA MOTOR CO., LTD.
  • Page 65 Install the woodruff key in the keyway in the crank· shaft. Connect the alternator wire connectors. CONNECTORS NOTE: Route the alternator wires properly and se· cure with the wire clamp. Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 66 25-29 ft·lb) (3.5-4.0 Install all removed parts in the reverse order of re· moval. UNIVERSAL HOLDER 077 25-0030000 Start the engine and check the ignition timing (Page 15·8). Date of Issue: May, 1983 7 - 5 © HONDA MOTOR CO., LTD.
  • Page 67 DRIVE AND D R I V E N P U L LEYS/KICK STARTER/CLUTCH 35-40 N·m (3.5-4.0 25-29 ft·lb) kg·m, Date Issue: May, 1983 8 - 0 © HONDA MOTOR CO., LTD.
  • Page 68 1 . Broken clutch weight spring 2. Weak driven face spring 2. Damaged ramp plate 3. Worn weight roller 3. Worn or damaged clutch lining 4. Faulty driven face Date of Issue: May, 1983 8 - 1 @ HONDA MOTOR CO., LTD.
  • Page 69 Measure the drive belt width. 13.5 mm (0.531 in) SERVICE LIMITS: NOTE: Use a genuine Honda Drive Belt. K ; o - q o & , 'J Date of Issue: May, 1 983 8 - 2...
  • Page 70 Remove the drive face boss. FACE COVER Remove the three bolts attaching the movable drive face cover and remove the cover. Remove the ramp plate. RAMP PLATE Date of Issue: May, 1 983 8 - 3 © HONDA MOTOR CO., LTD.
  • Page 71 Check each roller for wear or damage. Measure each roller O.D. 1 7.40 mm (0.685 in) SERVICE LIMIT: Measure movable drive face bushing I.D. 24.070 mm (0.9476 in) SERVICE LIMIT: Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 72 Use 1 0-15g of grease and apply evenly to the in· side of the drive face. Then install the weight rollers. NOTE: Specified grease: Lithium based • Mitsubishi: HD-3 • Nippon Sekiyu: Lipanox Deluxe 3 • ldemitsu: Coronex Date of Issue May, 1 983 © HONDA MOTOR CO., LTD.
  • Page 73 MOVABLE D R I V E FACE INSTALLATION Clean the hole in the movable drive face, drive face boss and crankshaft. Install the movable drive face assembly onto the crankshaft. CRANKSHAFT Date of Issue: May, 1 983 8 - 6 © HONDA MOTOR CO., L TO.
  • Page 74 Do not get oil or grease on the drive belt or pulleys. Install the left case cover and kick starter pedal. LEFT CASE COVER Install the left floor board and frame center cover. Date of Issue: May, 1983 8 - 7 © HONDA MOTOR CO., LTD.
  • Page 75 DRIVE AND D R I V E N PULLEYS/KICK STARTER/CLUTCH KICK STARTER Date Issue: May, 1 983 © HONDA MOTOR CO.,...
  • Page 76 Remove the kick starter spindle. KICK STARTER SPINDLE Attach the crankcase puller as shown with the two CRANK CASE PULLER 07935-KG80000 long special bolts. Remove the kick starter driven gear with the case puller. Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 77 KICK STARTER SPINDLE Disassemble the kick starter spindle. SPECIAL PIN Disassemble the kick starter idle shaft. STARTER IDLE GEAR DOWEL PIN SPRING IDLE GEAR SHAFT FRICTION SPRING Date of Issue: May, 8- 1 0 1983 © HONDA MOTOR CO., LTD.
  • Page 78 Inspect the kick starter spindle bushings and idle BUSHINGS gear shaft bearings for wear or damage. IDLE GEAR SHAFT BEARING Inspect the idle gear and shaft for wear or damage. Date of Issue: May, 1983 8 - 1 1 © HONDA MOTOR CO . •...
  • Page 79 Align the idle gear friction spring with the groove case in the left as shown. DOWEL PIN F R ICTION SPRING Date of Issue: May, 1983 8 - 1 2 © HONDA MOTOR CO., L TO.
  • Page 80 Install the drive belt and movable drive face assem· bly (Page 8·6). Install the left case cover and kick starter pedal (Page 8·7). Install the frame center cover (Section 1 1 ). RETURN SPR ING Date of Issue: May, 1983 8- 1 3 ©HONDA MOTOR CO., L TO.
  • Page 81 DRIVE AND D R I V E N PULLEYS/KICK STARTER/CLUTCH CLUTCH/DRIVEN PULLEY 35-40 N·m (3.5-4.0 kg·m, 25-29 ft·lb) Date of Issue: May, 1983 8- 1 4 © HONDA MOTOR CO., LTD.
  • Page 82 Place the compressor in a vise and remove the 28 mm special nut. Remove the compressor from the vise and back out the drive bolt. CLUTCH SPRING COMPRESSOR 07960- KJ90000 Date of Issue: May, 1983 8- 1 5 © HONDA MOTOR CO., L TO.
  • Page 83 DRIVE AND DRIVEN PULLEYS/KICK STARTER/CLUTCH SPRING DRIVE PLATE CLUTCH OUTER CLUTCH SPRING CLUTCH WEIGHT SPECIAL NUT Remove the seal collar. SEAL COLLAR Date of Issue: May, 1 983 8- 1 6 © HONDA MOTOR CO., LTD.
  • Page 84 DRIVE AND D R I V E N PULLEYS/K ICK STARTER/CLUTCH Withdraw the guide roller pin and guide roller. GUIDE ROLLER GUIDE ROLLER PIN DRIVEN FACE MOVABLE DRIVEN FACE GUIDE RDL GUIDE ROLLER Date of Issue: May, 1983 8 - 1 7 © HONDA MOTOR CO., L TO.
  • Page 85 INNER BEAR lNG Remove the snap ring and remove the outer bearing SNAP RING with Bearing Remover Shaft (07746-0050100) and Bearing Remover Head, 12 mm (07746-0050300). INNER BEARING OUTER BEARING Date of Issue: May, 1983 8- 1 8 © HONDA MOTOR CO.,...
  • Page 86 Inspect the clutch shoes for wear or damage. Measure the thickness of each shoe. SERVICE LIMIT: 2.0 mm (0.08 in) Measure the driven face spring free length. SERVICE LIMIT: 59.1 (2.33 in) Date of Issue: May, 1983 8- 1 9 © HONDA MOTOR CO.,...
  • Page 87 Seat the snap ring in its groove. Pack all bearing cavities with 5.0-5.5 g of grease. NOTE: Specified grease: Nippon Sekiyu LIPANOX DELU X E 3 Date of Issue: May, 1983 8 - 2 0 © HONDA MOTOR CO.,...
  • Page 88 Install the snap ring. Install the movable driven face, guide roller and roller pin. Install the seal collar. SEAL COLLAR Date of Issue: May, 1983 8- 2 1 © HONDA MOTOR CO., LTD.
  • Page 89 TORQUE: 35-40 N·m (3.5-4.0 kg·m, 25-29 ft·lb) Install the driven face (Page 8·6). Install the left case cover (Page 8·7). UNIVERSAL HOLDER CLUTCH OUTER 077 25-0030000 Date of Issue: May, 1 983 8 - 2 2 © HONDA MOTOR CO., LTD.
  • Page 90 FINAL RED UCTION Date of Issue: May, 1983 9 - 0 © HONDA MOTOR CO., L TO.
  • Page 91: Final Reduction

    2. Seized or burnt transmission Abnormal noise 1. Worn, seized or chipped gears 2. Worn bearing Oil leaks 1. Oi level too high 2. Worn or damaged oil seal Date of Issue: May, 1983 9 - 1 © HONDA MOTOR CO., LTD.
  • Page 92 Remove the transmission case cover bolts and re· move the transmission cover. Remove the final gear and countershaft. FINAL GEAR COUNTERSHAFT Remove the drive shaft from the transmission cover. D R I V E SHAFT Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 93 Inspect the drive shaft and gear for wear or damage. Inspect the countershaft and gear for wear or dam­ age. Inspect the final gear for wear or damage. L TO. Date of Issue: Ma 1983 9 - 3 © HONDA MOTOR CO.,...
  • Page 94 BEARING REMOVER SET, 12 mm 07936-1660000 (Not available in U.S.A.) or Use the bearing remover if drive shaft bearing re· BEARING REMOVER, 1 2 mm 07936-1660100 placement is necessary. and REMOVER WEIGHT 07936-3710200 Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 95 OIL SEAL DRIVER Drive the final shaft bearing into the left case. 077 49-001 0000 PILOT, 1 7 mm ATTACHMENT, 37 40 mm 077 46-0040400 077 46-001 0200 Date of Issue: May, 1983 9 - 5 © HONDA MOTOR CO., LTD.
  • Page 96 32 x 35 mm PI LOT, 1 2 mm ATTACHMENT, 07746-0010100 077 46-0040200 Slide the drive shaft through the bearing from the inside. D R I V E SHAFT Date of Issue: 9 - 6 1983 © HONDA MOTOR CO., LTD.
  • Page 97 (Page 8-7). Install the frame center cover (Section 11 ) . Install the rear wheel (Page 1 3-3). Pour the specified amount of oil through the filler opening (Page 2-4). Date of Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 98 HONDA NH80 CRAN KCASE/CRANKSHAFT 1 0-0 Date Issue: May, 1983 © HONDA MOTOR CO., LTD.
  • Page 99 Universal bearing puller 07631-0010000 (not available in U.S.A.) Crankcase puller 07935-KG80000 Common Driver 07749-0010000 Attachment, 42 077 46-001 0300 Pilot, 25 mm 077 46-0040600 Date of Issue: May, 1 983 1 0 - 1 © HONDA MOTOR CO., L TO.
  • Page 100 Attach the special tool on the left crankcase as shown with the three special short bolts. Remove the crankshaft. CAUTION: Do not drive the crankshaft out with ham­ mer. CRANK PULLER 07935-KGSOOOO Date of Issue: May, 1983 1 0- 2 © HONDA MOTOR CO., LTD.
  • Page 101 SERVICE LIMIT: mm {0.02 Measure the connecting rod big end radial clearance at two points in the and Y directions. SERVICE LIMIT: 0.04 mm (0.0016 in) Date of Issue: May, 1983 1 0-3 © HONDA MOTOR CO., L TO.
  • Page 102 Apply clean engine oil to all moving and sliding surfaces. • Remove all gasket materials from the crankcase mating surfaces. ·Dress any roughness or irregularities with an oil stone. Date of Issue: May, 1983 1 0-4 1 0 8 © HONDA MOTOR CO., L TO.
  • Page 103 1480200) onto the crankshaft. Hold the bolt and turn the nut clockwise to fully install the crankshaft. lubricate the crankshaft main and journal bearings with Honda 2-stroke oil or equivalent. ASSEMBLY COLLAR 07965-GC70100 (INC. IN 07965-GC70000) Date of Issue: May, 1983 1 0- 5 ©...
  • Page 104 1480200) onto the crankshaft. Hold the bolt and turn the nut clockwise to install the oil seal into place. ASSEMBLY TOOL 07965-1480200 (INC. I N 07965-GC70000) Date of Issue: May, 1 983 1 0- 6 1 1 0 © HONDA MOTOR CO., LTD.
  • Page 105 Piston, cylinder and cylinder head (Page 6-7). Drive and driven pulleys (Page 8-6, 8-22). Oil pump (Page 2-2). Reed valve and carburetor (Page 4-12, 4-7). Engine (Page 5-4). Date of Issue: May, 1983 1 0- 7 1 1 1 © HONDA MOTOR CO., LTD.
  • Page 106 FRAME COVERS Issue: May, 1983 Date 1 1 -0 1 1 2 © HONDA MOTOR CO., LTD.
  • Page 107 1 1 . FRAME COVERS 1 1 -2 FRAME COVER REMOVAL FRAME COVER INSTALLATION 1 1 -4 Date of Issue: May, 1983 1 1 - 1 1 1 3 © HONDA MOTOR CO., LTD.
  • Page 108 BOLTS Remove the two bolts attaching the floor plate and FLOOR PLATE remove the floor plate. 1983 Date of Issue: May, 1 1 - 2 1 1 4 © HONDA MOTOR CO., L T O .
  • Page 109 Remove the glovebox and floor plate (Page 1 1-2). Remove the frame center cover. Remove the right and left floor boards. RIGHT FLOOR BOARD Date of Issue: May, 1983 1 1 - 3 1 1 5 © HONDA MOTOR CO., L TO.
  • Page 110 Fork seal driver 07747-0010100 or Fork seal drrver 07947-3550000 Fork seal driver attachment 07747_0010400 Pin spanner 07702-0020000, 07702-001 0000 or M9361-41 2-099788 {U.S.A. only) Date of Issue: May, 1983 1 2 - 1 1 1 9 © HONDA MOTOR CO., LTD.
  • Page 111 Faulty or unevenly worn tire 5. Excessive wheel bearing play suspension Soft 1. Weak fork springs Front suspension noise 1 . Fork link binding 2. Loose front fork fasteners Date of Issue: May, 1983 1 2 - 2 © HONDA MOTOR CO., L TO.
  • Page 112 Disconnect the front turn signal wires. HANDLEBAR FRONT COVER Remove the two bolts attaching the handlebar front cover and remove the front cover with the right and left front turn signals. Date of Issue: May, 1983 1 2 -3 © HONDA MOTOR CO., LTD.
  • Page 113 Disconnect the meter wires and the speedometer REAR VIEW MIRRORS cable. Remove the rear view mirrors and meter cluster assembly. SPEEDOMETER CABLE Date of Issue: May, 1 983 1 2 -4 © HONDA MOTOR CO., L TO.
  • Page 114 METER ASSEMBLY Remove the four screws and remove the meter as· sembly. Remove the meter cover. Remove the indicator panel by releasing the locking pawls. LOCKING PAWLS Date of Issue: May, 1983 1 2 - 5 © HONDA MOTOR CO., LTD.
  • Page 115 Remove the right handlebar switch by removing the THROTTLE GRIP two screws. Disconnect the throttle cable from the throttle grip and remove the throttle grip from the handlebar. Date of Issue: May, 1 983 1 2 - 6 ©HONDA MOTOR CO., LTD.
  • Page 116 AVAILABLE IN U.S.A. STALLAT TABS Install the handlebar, aligning the tabs of the han· dlebar bracket with the grooves in the steering stem. STEM GROOVES Date of Issue: May, 1983 1 2 - 7 © HONDA MOTOR CO., L TO.
  • Page 117 Brake lever free play (Page 3-9) Headlight aiming (Page 3-1 0) • • Throttle grip free play (3-4) PUNCH MARKS Check the operation of all electrical parts. • Date of Issue: May, 1983 1 2 -8 © HONDA MOTOR CO., LTD.
  • Page 118: Front Wheel

    • Set the axle in V blocks and measure the runout. The actual runout is of the total indicator read· ing. SERVICE LIMIT: 0.2 (0.01 Date of Issue: May, 1983 1 2 - 9 © HONDA MOTOR CO., L TO.
  • Page 119 2.0 mm (0.08 in) SERVICE LIMITS: 2.0 mm (0.08 Radial: Axial: DISASSEMBLY Remove the dust seal, bearings and distance collar - Date of Issue: May, 1983 1 2 - 1 0 © HONDA MOTOR CO., LTD.
  • Page 120 Keep grease off the linings and COLLAR DUST SEAL brake drum. Apply grease to the inside of the dust seal. Install the dust seal and axle collar. Date of Issue: May, 1983 1 2 - 1 1 © HONDA MOTOR CO., L TO.
  • Page 121 Adjust the front brake lever free play (Page 3-9). BRAKE CABLE SPEEDOMETER CABLE Install the cushion arm covers with the bolts. CUSHION ARM COVER Date of Issue: May, 1983 1 2 - 1 2 © HONDA MOTOR CO., L TO.
  • Page 122: Front Brake

    F R O NT BRAKE D R U M INSPECTION front wheel (Page 1 2·9). Remove the Remove the brake panel. 1.0. Measure the brake drum 1 1 1.0 SERVICE LIMIT: mm (4.37 in) 1983 Date of Issue: May, 1 2 - 1 3 © HONDA MOTOR CO., LTD.
  • Page 123 Remove the speedometer drive gear. BRAKE P A N E L ASSEMBLY Lubricate the speedometer drive gear with grease and install the drive gear in the brake panel. Date of Issue: May, 1983 1 2 - 1 4 © HONDA MOTOR CO., LTD.
  • Page 124 PUNCH MARKS NOTE: Align the punch marks· on the brake arm and camshaft. Torque the brake arm bolt. TORQUE: 8-12 N·m 6-9 ft·lb) (0.8-1.2 kg·m, Date of Issue: May, 1983 1 2 - 1 5 © HONDA MOTOR CO., L TO.
  • Page 125 STE E R I NG/FRONT WHEE L/BRAKE/SUSPENSION FRONT SHOCK FRONT SHOCK REMOVAL Remove the front wheel (Page 1 2·9). Remove the pivot arm bolt and the pivot arm. Date of Issue: May, 1 983 1 2 - 1 6 13 4 © HONDA MOTOR CO., LTD.
  • Page 126 Compress the spring by hand and loosen the lock nut and joint. Remove the joint and lock nut. Remove the spring, lower case and spring seat. Date of Issue: May, 1983 1 2 - 1 7 13 5 © HONDA MOTOR CO., LTD.
  • Page 127 Apply a thread lock to the lock nut and screw the lock nut onto the damper shaft completely. Install the lower joint and tighten the lock nut. Date of Issue: May, 1983 1 2 - 1 8 © HONDA MOTOR CO., LTD.
  • Page 128 Lubricate and loosely install the front fork pivot arms with the attaching bolts and nuts. Install the front wheel (Page 12-12). FRONT FORK PIVOT ARM Date of Issue: May, 1983 1 2 - 1 9 © HONDA MOTOR CO., L TO.
  • Page 129: Front Fork

    - Front wheel (Page 12-9). - Glovebox (Section 1 1 ) . - Steering stem nut. PIN SPANNER 07 02-0020000, 07702-0010000 or M9361-41 2-099788 ( U.S.A. only) Date of Issue: May, 1983 1 2 - 2 0 © HONDA MOTOR CO., LTD.
  • Page 130 FRONT F E N D E R REMOVAL FRONT FENDER Remove the two bolts attaching the front fender and remove the front fender. Date of Issue: May, 1983 13 9 1 2 - 2 1 © HONDA MOTOR CO., LTD.
  • Page 131 I at ion. BOTTOM CONE RACE REPLACEMENT Remove the bottom cone race with a cold chisel, be· ing careful not to damage the steering stem. Date of Issue: May, 1983 1 2 - 2 2 © HONDA MOTOR CO., LTD. •..
  • Page 132 Screw in the race until snug against the top ball race, then back it out 1 /8 turn. NOTE: Check that the steering stem rotates freely and there is no vertical play. Date of Issue: May, 1983 1 2 - 2 3 © HONDA MOTOR CO., L TO.
  • Page 133 - Handlebar (Page 1 2·7) - Meter assembly (Page 1 2·6) - Glovebox (Section 1 1 ) SPANNER 07702-0010000 or M9361-41 2-099788 (U.S.A. only) Date of Issue: May, 1983 1 2 - 2 4 © HONDA MOTOR CO., L TO.
  • Page 134 REAR W H E E L/BRAKE/SUSPENSION 30-40 N.m (3.0- 4.0 kg·m, 22-29 ft·lb) � 20-30 N.m 12.0 - 3.0 kg· 80-100 N.m (8.0 - 1 0.0 kg·m, ft·lb) 58-72 Date of Issue: May, 1983 1 3- 0 © HONDA MOTOR CO., L TO.
  • Page 135 7. Improper engagement between brake arm and Brake squeaks camshaft serrations 1 . Worn brake linings 2. Foreign matter on linings 3. Rough brake drum shoe contacting face Date of Issue: May, 1983 1 3- 1 © HONDA MOTOR CO., LTD.
  • Page 136: Rear Wheel

    REAR W H E E L R I M RUNOUT INSPECTION Check the rim for runout using a dial gauge as shown. SERVICE LIMITS: Radial: 2.0 mm (0.08 Axial: 2.0 mm (0.08 Date of Issue: May, 1983 1 3 - 2 © HONDA MOTOR CO., L TO.
  • Page 137: Rear Brake

    40-50 (4.0-5.0 kg-m, ft·lb) 29-36 Install the frame center cover. REAR BRAKE REAR BRAKE CAM ft·lbl 4-7 N·m kg·m, 3-5 � "'t> REAR BRAKE ARM Date of Issue: May, 1983 1 3- 3 © HONDA MOTOR CO., LTD.
  • Page 138 BRAKE SHOES Disconnect the brake cable from the brake arm. Remove the brake shoes. Remove the brake arm and the brake cam. BRAKE ARM BRAKE CABLE Date of Issue: May, 1 983 1 3 -4 © HONDA MOTOR CO., LTD.
  • Page 139 Tighten the brake arm bolt to the specified torque. TORQUE: 4-7 N·m 3-5 ft·lb) (0.4-0.7 kg·m, BRAKE CAM BRAKE ARM Install the brake arm spring. BRAKE ARM SPRING Date of Issue: May, 1 983 1 3- 5 ©HONDA MOTOR CO., LTD.
  • Page 140 (3.0-4.0 kg·m, 22-29 ft·lb) © (§ � 20-30 N·m � .0 kg·m, 1 4-22 ft·lbl 1 5-25 N·m ( 1 .5-2.5 kg·m, 1 1 -18 ft-lb) Date of Issue: May, 1983 1 3 - 6 © HONDA MOTOR CO., L TO.
  • Page 141 Remove the rear shock absorber lower joint by com­ pressing it with the compressor. SHOCK ABSORBER COMPRESSOR LOCK LOWER 07959-3290001 JOINT REAR SHOCK ABSORBER SPR!NG WASHER REAR DAMPER LOWER JOINT STOPPER RUBBER LOCK NUT Date of Issue: May, 1983 1 3- 7 © HONDA MOTOR CO., LTD.
  • Page 142 (2.0-3.0 kg-m, 14-22 ft-lb) Check the operation of the shock absorber by press­ ing down on the end of the frame several times. LOWER MOUNT BOLT Date of Issue: May, 1983 1 3 -8 © HONDA MOTOR CO., L TO.
  • Page 143 FUEL TAN K/OI L TANK Date of Issue: May, 1983 1 4-0 © HONDA MOTOR CO., LTD.
  • Page 144 Clogged fuel strainer 4. Stuck fuel valve diaphragm Mixture too lean Clogged fuel tank cap breather hole fuel line Clogged collapsed Clogged strainer fuel May, Date Issue: 1983 1 4- 1 1 55 © HONDA MOTOR CO .•...
  • Page 145 Remove the frame center and rear covers (Section 1 1 ) . Disconnect the resistor wire connector. Remove the bolt and take out the battery. BATTERY BOX Date of Issue: May, 1983 1 4- 2 © HONDA MOTOR CO., L TO.
  • Page 146 Check the fuel gauge sensor's operation (page 15- 18). F U E L TANK I NSTALLATION The installation sequence is essentially the reverse order of removal. Date of Issue: May, 1983 1 4-3 15 7 © HONDA MOTOR CO., LTD.
  • Page 147: Oil Tank

    Clean the oil strainer (Page 3-6). To install, reverse the foregoing removal procedure. Bleed the oil line after installing the oil pump (Page 2·3). O I L LEVEL IND ICATOR SWITCH COUPLER Date of Issue: May, 1983 1 4-4 © HONDA MOTOR CO., L TO.
  • Page 148: Electrical Equipment

    Spark plug gap 0.6-0.7 mm (0.024-0.028 in) Ignition coil Primary 0.2-0.3r2 resistance Secondary 3.4-4.2 kG 1 4 ° BTDC at 1 ,800 rpm Ignition timing Date of Issue: May, 1983 1 5- 1 © HONDA MOTOR CO., L TO.
  • Page 149 Faulty front or rear stop switch 1 . Faulty starter pinion 6. Faulty starter relay 2. Low battery 7. Poorly connected, broken or shorted wire 8. Faulty starter motor Date of Issue: May 1983 1 5- 2 1 60 © HONDA MOTOR CO L TO.
  • Page 150 Flush with water and get prompt medical 1.25 attention. 1.24 ELECTROLYTE TEMP. VS. SPECIFIC GRAVITY o• 10" 20" 2 5 ' 30" 35" 40" ELECTROLYTE TEMPERATURE ° C Date of Issue: May, 1983 1 5 - 3 © HONDA MOTOR CO., L TO.
  • Page 151 I N S E R T T H E B A T T E R Y T U B E S E C U R E L Y . Date of Issue: May, 1983 1 5-4 © HONDA MOTOR CO LTD. .•...
  • Page 152: Charging System

    Charging rpm ( I nitial) 4,000 6,000 max. 0.9A min. 1 .4A max. 2,000 If the readings are not within specifications, check the stator and regulator/rectifier. Date of Issue: May, 1 983 1 5- 5 © HONDA MOTOR CO., LTD.
  • Page 153 R E GULATOR/A ECTIF l E A Remove the frame center cover (Section 1 1 ) . Disconnect the regulator/rectifier coupler. Remove the regulator/rectifier by removing the attaching bolt. COUPLER 1983 Date of Issue: May, 1 5- 6 © HONDA MOTOR CO., LTD.
  • Page 154 SANWA ELECTRIC TESTER: x Kn BLACK x 100 n KOWA ELECTRIC TESTER: ( 1 1 UNIT: Kn PROBE PINK WHITE BLACK - PROBE PINK � WHITE 0.5-10 1- 5 BLACK Date of Issue: May, 1983 1 5- 7 © HONDA MOTOR CO.,...
  • Page 155: Ignition System

    Timing is correct the index mark aligns with the "F" mark (within at 1,800 rpm. 3°) 1,800 IGNITION TIMING: ± 3° BTDC "F" MARK Date of Issue: May, 1983 1 5-8 © HONDA MOTOR CO., L TO.
  • Page 156 Measure the resistances between the terminals with an ohmmeter. Black/red- Engine ground S0-3oo n Blue/yellow - Body ground 10-100 n NOTE: Measure the resistances in the range. Alternator removal/installation (Page 7-2, 7-4). Date of Issue: May, 1983 1 5-9 © HONDA MOTOR CO., L TO.
  • Page 157 • Use the x 1 00 for Kowa Tester. UNIT: Kn . PROBE SI'J PROBE "Needle swings 0.1-10 then returns" 0.5-200 0.5-50 1-50 0.2-30 0.1-10 Date of Issue: May, 1983 1 5- 1 0 © HONDA MOTOR CO., L TO.
  • Page 158: Starting System

    STARTER R E LAY REMOVAL Remove the frame center cover (Section 1 1 ) . Remove the battery box (Page 15-4). Remove the starter relay switch. Date of Issue: May, 1983 1 5 - 1 1 © HONDA MOTOR CO., L TO.
  • Page 159 • Record the number and location of the commutator thrust washers. ROTOR BRUSH INSPECTION Measure the length of each brush. SERVICE LIMIT: (0.12 Date of Issue: May, 1983 1 5- 1 2 © HONDA MOTOR CO., LTD.
  • Page 160 Check that there is no f oreign material inside the starter body. Install the commutator with the brush holder into the starter body. Date of Issue: May, 1983 1 5- 1 3 1 7 1 © HONDA MOTOR CO . L TO.
  • Page 161 Install the starter motor in the reverse order of re­ moval. Secure the wires with the wire clamps. · Install the engine (Section STARTER WIRES Date of Issue: May, 1983 1 5 - 1 4 © HONDA MOTOR CO.,...
  • Page 162 HORN SWITCH COLOR LIGHT BLACK CODE BLUE BAT2 FREE PUSH TURN SIGNAL SWITCH HORN SWITCH HEADLIGHT H I - LOW SWITCH COLOR BROWN BLUE WHITE CODE Date of Issue: May, 1983 1 5 - 1 5 © HONDA MOTOR CO., LTD.
  • Page 163 The switches are not adjustable. H O R N The horn is normal if it sounds hen a 12V battery is connected across the terminals. Date of Issue: May, 1983 1 5 - 1 6 © HONDA MOTOR CO., LTD.
  • Page 164 Float position Needle Position FLOAT AT UPPER LIMIT F ( F U LL) FLOAT AT LOWER LIMIT E (EMPTY) EMPTY LOWER LIMIT Date of Issue: May, 1983 1 5- 1 7 © HONDA MOTOR CO., L TO.
  • Page 165 Should the lamp fail to go on and go out as the float is moved up and down, check for loose connections and repeat the above proce­ dure. Date of Issue: May, 1983 1 5 - 1 8 © HONDA MOTOR CO., LTD.
  • Page 166 Remove the turn signal lenses by removing the screws. SCREWS Replace the bulb with a new one. BULB Install the lens, being careful not to overtighten the screws. Date of Issue: May, 1983 1 5- 1 9 © HONDA MOTOR CO., LTD.
  • Page 167 L - - - - - - - - - REAR BRAKE SWITCH g L, FRONT TURN SIGNAL 1'lV 32cp TVRN SIGNAL DIMMER HORN $WITCH • • Date of Issue: November, 1 983 © American 1 983 · All Rights Reserved Honda Motor Co.,...
  • Page 169: Wiring Diagram

    WIRING DIAGRAM 1 984: FI'ONT BI'AKE SWITCH SI'EEOOMETEI' liG�T OIL INDICATOR LIGHT 3.•w I[AM LAMP HIGH ,.LOT REAR BRAKE S WITCH · TURN $1GNAL $WITCH • 1 8 0 1 6·2...
  • Page 170 B..BLUE • ... LIGHT GREEN ....GREE ....PINK ..GRAY )PS\VITCtt Date of Issue: November, 1 9 8 3 1 9 8 3 © American Honda Motor Co., Inc. - All Rights Reserved...
  • Page 171 The chamber's shape and centrally located spark plug provide a fast smooth combustion process under all loads and engine speeds. Date of Issue: May, 1983 1 7 - 1 © HONDA MOTOR CO., LTD.
  • Page 172 TECHNICAL FEATURES VENTURI EXHAUST PORT The exhaust port on this engine has been designed with a slight venturi shape to create just enough back pressure to momen· tarily restrict the exit of the exhaust gases for a more complete combustion cycle. The exhaust quickly exits the cylinder after passing the venturi of the exhaust port.
  • Page 173: Automatic Transmission

    REDUCTION RATIO: which will result in a reduced drive ratio between 2 : 1 the driven and drive pulleys. REDUCTION RATIO: 1 : 1 Date of Issue: May, 1 7 - 3 1983 © HONDA MOTOR CO., LTD.
  • Page 174 As the speed of the engine increases, centrifugal force on the weight rollers is also increased. This pushes the movable drive face inward. The unit then acts with a reduced drive ratio by allowing the drive belt to run on a pulley of greater diameter. Date of Issue: May, 1983 1 7 -4 © HONDA MOTOR CO., L TO.
  • Page 175 When this occurs, the drive ratio decreases and less torque is delivered to the final reduction. Date of Issue: May, 19B3 1 7- 5 © HONDA MOTOR CO., L TO.
  • Page 176 Carbon blocking exhaust system � 5. Remove spark plug WET PLUG ---- -- -- -+ Carburetor flooded ( 1 ) Faulty control box Throttle valve open excessively Date of Issue: May, 1983 1 8- 1 © HONDA MOTOR CO., L TO.
  • Page 177 ENGINE KNOCKS ---- -- -• ( 1 ) Excessive carbon build·up in run at high speed combustion chamber (2) Use of improper grade of fuel ENGINE DOES NOT KNOCK (3) Clutch slipping Fuel air mixture too lean Date of Issue: May, 1983 1 8- 2 © HONDA MOTOR CO., LTD.
  • Page 178 (3) Clogged fuel tank cap breather hole 3. Remove carburetor and check CLOGGED ---- -- -- -• ( 1 ) Clean for a clogged jet NOT CLOGGED Date of Issue: May, 1 983 1 8-3 © HONDA MOTOR CO., L TO.
  • Page 179 Weak shock spring (2) Excessive load (3) Leaky damper If susp sion is too hard 3. If suspension is noisy ( 1) Slider binding (2) Damaged shock stopper rubber Date of Issue: May, 1983 1 8-4 © HONDA MOTOR CO., LTD.
  • Page 180 Float down: Lamp on r--- -- -- -- -- -- -- -- -- -- -- -- -• ( 1) Deformed oil tank CORRECT (2) Foreign matter in tank Date of Issue: May, 1983 1 8- 5 ©HONDA MOTOR CO .•...
  • Page 181: Fuel Gauge

    (up·and-down stroke/sec) POINTER MOVES � INCORRECT ---- -- -+ ( 1 ) Loose or disconnected term ina I Check each connector CORRECT ( 1) Shorted or broken balancing coil/lead Date of Issue: May, 1983 1 8- 6 ©HONDA MOTOR CO., L...
  • Page 182: Starter Motor

    STOPPED ---- -- -- -. ( 1 ) Pinion stuck out � NOT STOPPED ---- -- -- -- -- -- -- -- -- -• ( 1 ) Starter relay shorted o r stuck closed Date of Issue: May, 1983 1 8- 7 © HONDA MOTOR CO., LTD.
  • Page 183 SERVICE TOOL NEWS NH80 #1 REVISED: 1 985 N H 8 0 - 1 983 A N D AFTER REQU I R E D SPECIAL TOOLS NH80 # 1 , supersedes dated November. (This STN 1 983) The tools listed below are necessary to service and maintain this model. However. these tools should already be in your inventory as they are necessary for servicing one or more existing models.
  • Page 184 033869� with old beanng race turned over for additional height. OPTIONAL TOOLS The following tools arc available from American Honda, but arc not required tools for this model. APPLICABILITY TOOL N U M B E R DESCRIPTION H / C...

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