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DISCLAIMER OF WARRANTY
This motorcycle is sold "as is" with all faults, obvious or not. There are no warranties
expressed or implied, including any warranty of merchantability and warranty of fitness
for any particular purpose.
"WARNING"
THE
COBRA
CX65
IS
A
COMPETITION
MODEL
ONLY
AND
IS
NOT
MANUFACTURED FOR, NOR SHOULD IT BE USED ON PUBLIC STREETS, ROADS
OR HIGHWAYS.
THE USE OF THIS BIKE SHOULD BE LIMITED TO PARTICIPATION IN
SANCTIONED COMPETITION EVENTS UPON A CLOSED COURSE BY A
SUFFICIENTLY SKILLED RIDER AND SHOULD NOT BE USED FOR GENERAL
OFF-ROAD RECREATIONAL RIDING.
IMPROPER USE OF THIS MOTORCYCLE CAN CAUSE INJURY OR DEATH.
THIS BIKE IS INTENDED FOR EXPERIENCED RACERS ONLY AND NOT FOR
BEGINNERS.
IT IS YOUR RESPONSIBILITY AS THE OWNER OF THIS COBRA MOTORCYCLE
OR AS THE PARENT, OR LEGAL GUARDIAN OF THE OPERATOR, TO KEEP THIS
COBRA MOTORCYCLE IN PROPER OPERATING CONDITION.
THIS BIKE WAS DESIGNED FOR RIDERS THAT WEIGH LESS THAN 110 LBS WITH
FULL RIDING GEAR AND SHOULD NOT BE OPERATED BY RIDERS THAT WEIGH
MORE THAN THAT.
BE SURE THAT THE RIDER ALWAYS WEARS ADEQUATE SAFETY GEAR
EVERYTIME HE OR SHE RIDES THEIR COBRA MOTORCYCLE.
IMPORTANT SAFETY NOTICE
Failure to follow WARNING instructions could result in severe injury or death to
the machine operator, a bystander, or a person inspecting or repairing the
machine.
CAUTION:
A CAUTION indicates special precautions that must be taken to avoid damage to
the machine.
NOTE:
A NOTE provides key information to make procedures easier or clearer.
MCC62014.V1
1
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Summary of Contents for Cobra CX65
- Page 1 THIS BIKE IS INTENDED FOR EXPERIENCED RACERS ONLY AND NOT FOR BEGINNERS. IT IS YOUR RESPONSIBILITY AS THE OWNER OF THIS COBRA MOTORCYCLE OR AS THE PARENT, OR LEGAL GUARDIAN OF THE OPERATOR, TO KEEP THIS COBRA MOTORCYCLE IN PROPER OPERATING CONDITION.
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Page 2: Table Of Contents
Table of Contents GENERAL INFORMATION ..................4 ..................... 4 PECIFICATIONS ENERAL ....................5 PTIONAL OMPONENTS ................. 5 PECIFICATIONS ORQUE ALUES ....................6 REAK ROCEDURE ....................6 TARTING ROCEDURE MAINTENANCE ......................7 ..........................7 ........................8 CHEDULE ............9 EPLACING RANSMISSION LUTCH UBRICANT ...................... - Page 3 – F ......................34 ARTS RAME – F ....................35 ARTS RONT HEEL – F – M ............. 36 ARTS RONT RAKES ASTER YLINDER – F – C ................37 ARTS RONT RAKES ALIPER – B ..................... 38 ARTS ODYWORK –...
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Page 4: General Information
21.1 ± 1.0 Transmission 6 speed Final drive ratio 14/45 Chain 116 links 420 Quality gear lubricant, or Cobra clutch milk Transmission / clutch oil type Do Not Run Automotive Motor Oil Quantity 530 ml (18.0oz) Chassis 60/100 – 14 Front tire 80/100 –... -
Page 5: Optional Components
Optional Components Weight of Rider (lb) Fork Spring Shock Spring less than 70 lb 0.24 kg/mm 42 N/MM (240 lb/in) KCC63724 SCC60240P (white) 75-85 lb 0.26 kg/mm 45 N/MM (260 lb/in) KCC63726 SCC60260PY stock (yellow) 85-100 lb 0.28 kg/mm 49 N/MM (280 lb/in) KCC63728 SCC60280PG (gold) Ohlins #... -
Page 6: Break-In Procedure
Break-In Procedure Your Cobra CX65 is a close-tolerance high performance machine and break-in time is very important for maximum life and performance. The CX65 can be ridden hard after the first ½ hour break-in time. Cobra recommends Bel-Ray H1-R premix oil with high octane pump gas mixed at 40:1. -
Page 7: Maintenance
CAUTION: Cobra recommends that you tell your child to take it easy the first couple of minutes in practice until the engine comes up to full operating temperature. Maintenance It is important that you adhere to this maintenance schedule so as to promote the longevity of your Cobra Motorcycle. -
Page 8: Schedule
New chains will stretch on first use. Never install a new chain prior to a race. Always ‘break’ them in during practice. Your Cobra Motorcycle has a 10 digit VIN (Vehicle Identification Number). The first two digits indicate the model and the seventh indicates the model year (MY). -
Page 9: Replacing Transmission / Clutch Lubricant
The frame is a combination of HSLA steel and 4130 Chrome Moly and it is important to weld it with the proper rod and heat settings set as light as possible. Cobra recommends replacing the frame with a new one if the old one becomes damaged. Use ER70S6 filler if welding on the frame. -
Page 10: Chain Adjustment
4. After it has drained, reinstall the bolt being sure that the rubber gasket is in place. Torque to 11 Nm (8 ft-lb). 5. Remove oil fill plug with an 8mm Allen wrench. 6. Carefully pour 16 oz (470 ml) of transmission oil into the oil fill opening. 7. -
Page 11: Air Filter Cleaning
Fork Maintenance Cobra strongly recommends that a professional service technician conduct all internal maintenance other than changing springs and oil. This will help to ensure safe and consistent operation. -
Page 12: Fork Air Bleeding
For routine maintenance, the chart below provides suggested service intervals for common procedures: Each Ride 10 hours 20 hours As Needed Bleed excess air Change Oil Change Seal/Swiper Change Bushings Fork Air Bleeding Tools required 3mm hex key (Allen wrench) During normal operation, both fork legs will build up air pressure. - Page 13 Carefully slide with wheel downward out of the brake caliper. 2. Remove the brake caliper from the fork leg (6mm hex key). 3. Loosen the fork caps (Cobra 37mm Fork Cap Tool). 4. Remove the fork legs from the triple clamps (5mm hex key).
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Page 14: Ignition Timing
6. Apply final torque to all four axle pinch bolts (7.4 ft-lb, 10 Nm) Ignition Timing The ignition timing value for the CX65 is 0° retarded from the standard base reference (0°). This can be verified by removing the ignition cover and looking as shown in the figure below. - Page 15 To disconnect these cable ties, use a screw driver as shown and push down on the short tab. The tab will be hidden from view by the cable tie strap.
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Page 16: Parts
Parts Parts – Air Box & Inlet System Air Box & Inlet REF # PART # DESCRIPTION RCC60007 AIRBOX TCC60008 MUD FLAP HCSP0003 SCREW - PLASCREW MCKGHO03 CLAMP, AIR BOOT TO AIR BOX RCC60002 AIR FILTER RCC60003 AIR FILTER CAGE RCC60004 AIR FILTER WIRE RCC60014... -
Page 17: Parts - Bars And Controls
HCNL1001 M10 LOCK NUT M8 X 20 HEX HEAD BOLT (4 REQ’D) HCBH0820 BCC60057 BRAKE LEVER BRAKE ASSY COMPLETE – FRONT CX65 ZL150 BAC60008 BKC60004 BRAKE - MASTER CYLINDER - REBUILD KIT - ZL150 ACCESSORY CKC60001 CLUTCH - MASTER CYLINDER - REBUILD KIT... -
Page 18: Parts - Carburetor
Parts - Carburetor Carburetor REF. # PART # DESCRIPTION RCR60026 CARBURETOR 26MM MIKUNI RCC60017 FLOAT BOWL CHAMBER RCMU0271 NEEDLE VALVE & SEAT ASSY SEE BELOW MAIN JET RCEX0026 NEEDLE JET STOCK 5L14 SEE BELOW PILOT JET RCC60013 GASKET, FLOAT BOWL RCEX0016 SPRING IDLE ADJUST SCREW RCEX0015... -
Page 19: Parts - Clutch - Master Cylinder
Parts – Clutch – Master Cylinder Clutch – Master Cylinder REF# PART # DESCRIPTION CAC60003 ASSEMBLY - CLUTCH MASTER CYLINDER (M/C) CX65 BKC60008 CAP & BLADDER KIT ZL150 BLADDER M3-0.5 X 6mm LONG PHILLIPS SCREW (2) BCC60058 CLAMP ZL150 HCBC0601 M6-1.0 X 25mm LONG SOCKET HEAD CAP SCREW... -
Page 20: Parts - Coolant System
Parts – Coolant System Coolant System REF # PART # DESCRIPTION FCC60060 RADIATOR W/CAP - CX65 CAP – 1.3 BAR FCMU0022 MCMUCL05 HOSE CLAMP 11-20 UNIVERSAL FCKG0214 HOSE - OVERFLOW FCDC0009 RADIATOR LOUVER-CX65 HCSP0002 PUSH PIN - PLASTIC HCCN0000 5mm EXTRUDED "U" NUT... -
Page 21: Parts - Electrical System
ROTOR OUTER STYLE CX65 ICMU0012 WOODRUFF KEY (NOT SHOWN) HCWF0010 10mm FLAT WASHER HCNS1001 M10 NUT CDI UNIT – POWER VALVE CX65 ICC60016 ICMU0035 MOUNT - CDI ICC60005 COIL DIGITAL 65 M5X16mm SOCKET HEAD CAP SCREW – COIL MOUNTING (2 REQ’D) HCBC0516 5mm WASHER –... -
Page 22: Parts - Engine Clutch
Parts – Engine Clutch Clutch Components REF. # PART # DESCRIPTION CLUTCH WASHER (2 REQ’D) ECDC0063 CLUTCH BUSHING – INNER / STEEL ECDC0064 EAEX0003 CLUTCH BASKET ASSEMBLY (INCLUDES ECDC0167) ECDC0066 CLUTCH PRESSURE PLATE CLUTCH DISC-FRICTION – (5 REQ’D) ECDC0068 CLUTCH DISC-STEEL – (4 REQ’D) ECDC0067 ECDC0069 CLUTCH HUB... -
Page 23: Parts - Engine - Clutch / Kick Cover
Parts – Engine – Clutch / Kick Cover Clutch / Kick Cover Components REF. # PART # DESCRIPTION ECC60235 CLUTCH COVER ZCC60007 GASKET-CLUTCHCOVER M6X25mm SOCKET HEAD CAP SCREW (6 REQ’D) HCBC0625 M6X30mm SOCKET HEAD CAP SCREW (2 REQ’D) HCBC0630 HCFH0616 M6X16mm FLAT HEAD BOLT WASHER –... -
Page 24: Parts - Engine - Ignition Side
M4X35mm SOCKET HEAD CAP SCREW (3 REQ’D) HCBC0402 HCNS1001 M10 NUT HCWF0010 10mm FLAT WASHER ICC60003 ROTOR PVL OUTER STYLE STATOR PVL DIGITAL – POWER VALVE CX65 ICC60014 M5X16mm BUTTON HEAD TORX (3 REQ’D) HCBT0516 5mm WASHER FLAT (3 REQ’D) HCWF0501 ECDC0024 SEAL, CRANKSHAFT... -
Page 25: Parts - Engine - Kick Mechanism
Parts – Engine – Kick Mechanism Kick Mechanism REF. # PART # DESCRIPTION SPACER – KICK SPRING CENTERING ECC60066 ECC60067 SPRING KICK START CX65 ECDC0036 SNAP RING, EXTERNAL 16mm - SPRING RET. ECDC0043 WASHER, KICKSTART BACKUP ECDC0042 SPRING, KICKSTART RAMP SHAFT, KICK STARTER – THREADED... -
Page 26: Parts - Engine - Shift Mechanism
ECDC0036 ECDC0073 CRANK DRIVE GEAR ECDC0112 SPACER, CRANK DRIVE GEAR SEAL, CRANKSHAFT ECDC0024 EKC62013 ENGINE CASE SET W/B&S CX65 DOWEL, HOLLOW (2 REQ’D) ECDC0031 ECC60095 BEARING RETAINER PLATE BEARING (SOME ENGINES HAVE THIS VS. #5 BUSHING) ECMU0020 ECC60119 SHIM WASHER NOTE MEASURE SHIM TO ORDER CORRECT SIZE SHIM 0.2mm THICK... -
Page 27: Parts - Engine - Top End
Parts – Engine – Top End Engine – Top End REF # PART # DESCRIPTION ECC60157 CYLINDER KIT PV CX65 (INCLUDES PISTON KIT & CYLINDER) ZCC60302 BASE GASKET 0.2mm THICK ZCC60303 BASE GASKET 0.3mm THICK ZCC60304 BASE GASKET 0.4mm THICK ZCC60305 BASE GASKET 0.5mm THICK... -
Page 28: Parts - Engine - Power Valve
Parts – Engine – Power Valve Engine – Power Valve REF # PART # DESCRIPTION VALVE – POWER VALVE ECC60150 NUT – JAM M6 X 1 HCNJ0601 CABLE – POWER VALVE ACTUATION - 2013 ECC60164 SPRING – PV RETURN ECC60079 ZCC60012 GASKET - POWER VALVE COVER ECC60089... -
Page 29: Parts - Engine - Transmission
ACCESSORY EKEX0001 ROD KIT EKC62013 ENGINE CASE SET W/B&S CX65 ECC60028 BUSHING ENGINE / SWINGARM PIVOT CX65 DOWEL, SOLID CENTERING (2 REQ’D) HCDP1401 M6X35mm SOCKET HEAD CAP SCREW (4 REQ’D) HCBC0604 Left Case Screws M6X30mm SOCKET HEAD CAP SCREW (7 REQ’D) -
Page 30: Parts - Exhaust System
Parts – Exhaust System Exhaust System REF # PART # DESCRIPTION EXPANSION CHAMBER – PRO CIRCUIT XAC62013 XCMU0033 ISOLATION MOUNT 6mm CLIP NUT-PLASTIC/PIPE MNT (1 REQ’D FOR PIPE & 2 HCHA0003 REQ’D FOR SILENCER) M6X16mm FLANGE HEAD BOLT (2 REQ’D) HCBF0616 O-RING –... -
Page 31: Parts - Forks & Triple Clamps
Parts – Forks & Triple Clamps Forks & Triple Clamps REF # PART # DESCRIPTION KAC62013 FORK COMPLETE, BRAKE & NON-BRAKE SIDE FCC60062 TOP TRIPLE CLAMP TRIPLE CLAMP BOTTOM ASS’Y (CLAMP & STEERING STEM) FAC60022 M6X30mm SOCKET HEAD CAP SCREW (4 REQ’D) (TOP) HCBC0603 M6X25mm SOCKET HEAD CAP SCREW (6 REQ’D) (BOTTOM) HCBC0625... -
Page 32: Parts - Fork - Leg Assembly - Brake Side
FORK OUTER TUBE KCC60043 FORK OUTER WEAR RING CLIP KCC60041 FORK GUIDE RING BOTTOM KCC60047 FORK SEAL SPACER KKC60003 FORK SEAL & SWIPER KIT - 37mm - CX65 KCC60066 FORK SEAL RETAINER RING CLIP KCC60067 FORK BUMPER KCC60064 FORK SPRING GUIDE KCC63726 FORK SPRING .26 KG/MM (SINGLE) -
Page 33: Parts - Fork - Leg Assembly - Non-Brake Side
FORK OUTER TUBE KCC60043 FORK OUTER WEAR RING CLIP KCC60041 FORK GUIDE RING BOTTOM KCC60047 FORK SEAL SPACER KKC60003 FORK SEAL & SWIPER KIT - 37mm - CX65 KCC60066 FORK SEAL RETAINER RING CLIP KCC60067 FORK BUMPER KCC60064 FORK SPRING GUIDE KCC63726 FORK SPRING .26 KG/MM (SINGLE) -
Page 34: Parts - Frame
HCFH0825 FCC60020 CHAIN ROLLER WITH BEARINGS & SEALS BCDC0153 WASHER TCMU0139 FOOTPEG SET ULTRA WIDE CX65 WITH SPRINGS FOOTPEG SPRING ULTRA WIDE 07 (2 REQ’D) TCC60012 8MM X 40 HEX HEAD 30MM NO THRD – FOOTPEG (2 REQ’D) HCBH0840 HCWF0803 8MM FLAT WASHER 8MM LOCKNUT –... -
Page 35: Parts - Front Wheel
Front Wheel REF# PART # DESCRIPTION WHEEL 14” FRONT WITH BEARINGS & SEALS WAC6FR03B (NO TIRE, OR TUBE,), BLACK HUB FOR CX65 – FRONT WCC60022 14” RIM, BLACK WCMU1400B SPOKE-FRONT WHEEL-65 (32 REQ’D) WCDC0002 NIPPLE-SPOKE 9GA. STAINLESS (32 REQ’D) WCDC0011 TUBE –... -
Page 36: Parts - Front Brakes - Master Cylinder
PART # DESCRIPTION BAC60008 ASSY COMPLETE - FRONT CX65 ZL150 (M/C-LINE-CALIPER) BAC60010 MASTER CYLINDER - FRONT (M/C) ASSEMBLY CX65 ZL150 BKC60008 CAP & BLADDER KIT ZL150 CAP ZL150 BLADDER - M/C CAP ZL150 M3-0.5 X 6mm LONG PHILLIPS SCREW (2) -
Page 37: Parts - Front Brakes - Caliper
Parts – Front Brakes – Caliper Front Brakes REF# PART # DESCRIPTION BAC60008 ASSY COMPLETE - FRONT CX65 (M/C-LINE-CALIPER) ZL150 BAC60009 CALIPER ASSY - CX65 ZL150 BKC60003 CALIPER FASTENER KIT ZL150 PAD PIN - ZL150 CLIP - PIN ZL150 2 - M6X32mm LONG ZL150 SEAL KIT –... -
Page 38: Parts - Bodywork
M6X20mm FLAT HEAD – FRONT SEAT MOUNT HCFH0620 TCMU0151 PETCOCK CAP – FUEL TANK TCHA0002 HOSE – FUEL CAP TCHA0003 SEAT – CX65 TAC60002 TCC60028 SEAT COVER REPLACEMENT M6X25mm SOCKET HEAD CAP SCREW – SEAT HOLDING HCBC0625 SPECIAL WASHER – SEAT HOLDING TCC60018 SIDE NUMBER PLATE –... -
Page 39: Parts - Rear Brake
BCMU0023 BRAKE PEDAL WITH TOE PIECE TOE PIECE – BRAKE PEDAL BCMU0023T HCBC0501 M5X 12mm SOCKET HEAD CAP SCREW BCDC0004 PUSH ROD ASSEMBLY WITH CLEVIS - CX65 FCEX0018 ECCENTRIC - ADJUST HCBC0612 M6X12mm SOCKET HEAD CAP SCREW BCC60004 ROTOR REAR... -
Page 40: Parts - Rear Wheel
14mm FLAT WASHER HCNL1402 M14 LOCKNUT SPROCKET – xx denotes number of teeth (37-53) PCDC00xx PCMU0116 CHAIN 420H 116 LINK CX65 14/48 M8X25mm HEX HEAD (4 REQ’D) HCBH0825 8mm FLAT WASHER (4 REQ’D) HCWF0801 8mm LOCK NUT (4 REQ’D) HCNL0801... -
Page 41: Parts - Shock External
Parts – Shock External Shock REF # PART # DESCRIPTION SHOCK ABSORBER – CX65 SAC62011 SHOCK - BEARING SPHERICAL SHOCK MOUNT–CARD (2 REQ’D) SCMU0043 O-RING - SHOCK - BUSHING – CARD (4 REQ’D) SCMU0039 SHOCK - MOUNT BUSHING – CARD (4 REQ’D) -
Page 42: Parts - Shock - Internal
Parts – Shock – Internal Shock REF # PART # DESCRIPTION SCMU0037 RING LOW SPEED COMP ADJUSTER SCMU0038 O-RING HIGH SPEED COMP ADJUSTER SCMU0036 O-RING COMP ADJUSTER CAP SCC60007 O-RING COMPRESSION ADJUSTER SCMU0051 O-RING - IFP SCMU0052 IFP SEAL BAND SCMU0033 O-RING SHOCK BASE SCMU0050... -
Page 43: Parts - Swingarm Assembly
#8 X 1/2 SELF TAPING SCREW (2 REQ’D FOR CHAIN SLIDER) HCPP0832 M5X12mm SHCS – CHAIN SLIDER MOUNT HCBC0501 PCC60004 CHAIN GUIDE (BOTTOM) CX65 M6X40mm FLANGE HEAD BOLT (2 REQ’D) HCBF0640 M6 LOCK NUT (2 REQ’D) HCNL0601 M7 NUT (2 REQ’D) HCNS0701 M7X35mm HEX HEAD FULL THREAD (2 REQ’D) -
Page 44: Service
There appears to be a wide range of variability in reading compression gauges across the country. The head volume of this Cobra Motorcycle is very small and so requires many kicks ~20 before you establish the most accurate reading possible. -
Page 45: Base Gasket Selection
1mm flexible solder material measurement calipers When rebuilding the ‘top end’ of your Cobra motorcycle, care must be taken to ensure the proper squish clearance. Squish clearance is defined as the minimum distance between cylinder head and piston at TDC, and there are negative effects of either having too much or too little clearance. - Page 46 The easiest way to measure squish clearance is with 1mm to 1.5mm thick flexible solder wire (available through most popular electronic stores). The process is as follows: Assemble the top end of the engine with either; 1) the crankcase stamp recommended base gasket or, 2) if assembling with a new set of cases assemble with a 0.4mm (0.015”) base gasket, and torque the head nuts to the proper torque specifications leaving off the spark plug and ignition cover...
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Page 47: Power Valve
Power Valve Disassemble to remove cylinder Disassembly 1. Remove the bolt that holds the PV clamp to the frame. 2. Remove the PV clamp by rotating it upward. 3. Remove the load spring and the cap. 4. Disconnect the electrical connector. 5. -
Page 48: Exhaust
Tools recommended for carburetor service: Small flat head screwdriver WD-40 6mm socket Your Cobra is equipped with an adjustable carburetor. Some fine-tuning may be needed according to weather condition and altitude. Proper jetting is very important for engine performance and engine life. Serious damage to the engine can occur if not properly adjusted. - Page 49 increments) and rev the engine after each adjustment. To lower the idle, turn the screw counter-clockwise. TOP END JETTING: Indications that the engine is running too rich (too much fuel for the air) are: Engine not revving out or blubbering at high RPMs. Engine will not ‘clean out’...
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Page 50: Rear Shock
9. Install the carburetor onto the motorcycle. Rear Shock The rear shock is fully serviceable but it is recommended that only trained professionals should service your shock. Contact Cobra or another qualified specialist for questions and service of your CX65shock. Brakes Proper Brake adjustment must have a slight amount of freeplay from the pedal/lever to the master cylinder piston. -
Page 51: Front Brakes
bubbles are seen on the 4 or 5 attempt. If bubbles are seen repeat until no bubbles appear. 4. Minimize the caliper volume. Using channel locking pliers, or similar, squeeze the caliper as shown to push the piston back as far as possible into the caliper. -
Page 52: Front Wheel
Front Wheel Assembly Put the wheel in place and install the axle and caps. Torque the caps to 45 Nm (33 ft-lb) Place the bike on the ground and 'exercise' the suspension a couple times while applying the front brakes. Tighten the four axle pinch bolts to 12 Nm (106 in-lb) -
Page 53: Tuning
Tuning Gearing Rear Gear Front Sprocket Sprocket Ratio 3.00 3.00 3.07 3.07 3.08 3.08 3.13 3.14 3.15 3.17 3.20 3.21 3.23 3.25 3.27 3.29 3.31 3.33 3.33 3.36 3.38 3.40 3.42 3.43 3.46 3.47 3.50 3.50 3.53 3.54 3.57 3.58 3.60 3.62 3.64... -
Page 54: Suspension
Front Fork Operation The front suspension on the CX65 works under the principals of hydraulic damping, and it features full adjustability to help tune the fork to meet each rider’s needs. -
Page 55: Fork Damping Adjustments
damping is adjustable on the fork cap, and compression damping is adjusted at the bottom of the fork. The other leg (the Smart Leg) has no rebound damping, and it contains both a speed sensitive compression damping mechanism as well as a position sensitive one. -
Page 56: Rear Shock Adjustments
the fork is forced to move very quickly such as on harsh landings or when traversing sharp edged bumps. Rear Shock Adjustments. Always start with standard settings and make damping changes in no more than two click increments and only make one change at a time. Symptom Action Rear end feels stiff on small bumps... -
Page 57: Carburetor
12. Adjustment of compression damping Carburetor Although your Cobra is sent from the factory with the carburetor jetted for optimal performance, you may find it necessary to adjustment your particular jetting due to current weather conditions, altitude, fuel variations, and/or engine modifications. - Page 58 Perform all jetting changes on a motorcycle that has been warmed up to proper operating temperature. The carburetor on your Cobra motorcycle is quite adjustable. Figure 49 shows its range of adjustment and in particular what adjustable component affects what range of operation (specifically throttle position).
- Page 59 TOP END JETTING: Adjust for clean full throttle acceleration Jet your top end (main jet) based on the acceleration of your Cobra Motorcycle on the longest straight at the track. Observe any of the lean or rich symptoms (spark plug appearance and bike performance) listed above and change your jetting accordingly.
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Page 60: Troubleshooting
Troubleshooting 1) Engine operates erratically a) Carburetor top is installed backwards b) The carburetor slide indexing pin is missing c) A carburetor vent elbow is plugged or has fallen out d) Faulty stator e) An air leak i) Base gasket ii) Intake / reed gaskets iii) Crank seals iv) Crank case gasket... - Page 61 b) Carburetor is dirty c) Ignition i) Spark plug fouled ii) Spark plug cap off iii) Engine Shut-off ‘kill’ switch is shorted iv) Bad electrical ground v) Stator winding damaged d) Exhaust is plugged with object of flooded fuel e) Engine is flooded f) Cracked, broken, or jammed reed pedal g) Excessive piston or cylinder wear h) Clutch bolt or shoe dragging on basket (drum).
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Page 62: Index
Index Air Filter Maintenance ....11 Compression test ......44 Airbox and Inlet Coolant System Parts .......... 16 Parts .......... 20 Bars and Controls Cylinder head Parts .......... 17 torque .......... 5 Base Gasket Selection ....45 Electrical Bodywork Parts .......... 21 Engine Parts .......... - Page 63 Parts .......... 23 Stator Kick Mechanism Torque ......... 5 Parts .......... 25 Suspension Lubrication Adjustment ......... 54 Recommended ......4 Swingarm Parts ......43 Maintenance Top End Schedule ........7 Parts .......... 27 Tips ..........7 Service ........45 Torque Values ......... 5 Recommended ......
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