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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.
MCC62011.2

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Summary of Contents for Cobra CX65 2022

  • Page 1 “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...
  • Page 2: Table Of Contents

    Table of Contents GENERAL INFORMATION ..................3 ..................3 PECIFICATIONS ENERAL ..................4 PTIONAL OMPONENTS ................. 4 PECIFICATIONS ORQUE ALUES ................... 5 REAK ROCEDURE ..................6 TARTING ROCEDURE MAINTENANCE ...................... 7 ........................7 ......................7 CHEDULE ............. 8 EPLACING RANSMISSION LUTCH UBRICANT ....................
  • Page 3 ......................42 EARING ....................... 43 USPENSION ..................... 44 ARBURETION TROUBLESHOOTING ..................47 INDEX ........................49...
  • 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 Front tire 60/100 – 14 Rear tire 80/100 –...
  • Page 5: Optional Components

    Optional Components Call your dealer, or the factory, for details  Carburetor jets  Pre filter for the airbox  Tires, tubes or ‘Tire Balls’  Sprockets  Suspension Springs Weight of Rider (lb) Fork Spring Shock Spring less than 70 lb 0.24 kg/mm 42 N/MM (240 lb/in) KCC60024...
  • 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 Motul 800 T2 premix oil with high octane pump gas mixed at 50:1 (50 ml oil to 1.3 gallon of gas, or 38ml oil to 1 gallon of...
  • Page 7: Starting Procedure

    CAUTION: For best results from your Cobra Motorcycle use only the recommended fuels. ‘Race’ fuels can be used, however, they are not required with the stock engine, and the engine will require addition attention to maintain proper jetting as weather condition change throughout the day.
  • Page 8: 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 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

    Hot oil and hot components on the motorcycle may cause burns. 2. Lean the bike against something or set on stand with oil drain hole. 3. Using a 8mm Allen wrench, remove the oil drain bolt located on the right side of the engine, on the clutch cover, near the brake lever (See Figure 1).
  • Page 11: Air Filter Cleaning

    3. If the chain requires adjusting, loosen the axle with a 22mm wrench, and loosen the jam nut with an 11mm wrench. Tighten the chain by rotating the adjustor bolts clockwise (CW) or loosen the chain by rotating the adjustor bolts (CCW). 4.
  • Page 12: Fork Oil Replacement

    8. Reinstall the filter assembly by pushing it down and forward into the airbox making sure the lip of the filter cage is properly seated into its receptacle (figure 5). Reinstall the air filter cap and holding wire. CAUTION: Double check to insure that the filter is pushed in tight at the bottom NOTE: Make sure you change or clean your filter after each moto.
  • Page 13: Ignition Timing

    5° advanced and retarded. The small timing marks between 0 & 5° is 2.5°. To change the timing, one must remove the flywheel with Cobra 65 flywheel puller # MCMUTL05. After the flywheel has been removed, the timing can be adjusted by...
  • Page 14: Parts

    Parts Parts – Airbox & Inlet System Coolant System 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 AIR BOOT, CARB TO AIRBOX RCC60006...
  • Page 15: Parts - Bars And Controls

    Parts – Bars and Controls Bars and Controls REF # PART # DESCRIPTION FAMU0011 HANDLEBAR - ALUMINUM TCMU0008 GRIPS (SET OF TWO FCMU0066 THROTTLE ASSEMBLY FCPW0004 CABLE COVER FCMU0021 THROTTLE COVER CCMU0014 MASTER CYLINDER W/LEVER - CLUTCH CCDC0001 CLUTCH LEVER RAC60001 THROTTLE CABLE TKMU0404...
  • Page 16: 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 17: Parts - Coolant System

    Parts – Coolant System Coolant System REF # PART # DESCRIPTION FCC60046 RADIATOR W/CAP - CX65 FCMU0022 CAP – 1.3 BAR MCMUCL05 HOSE CLAMP 11-20 UNIVERSAL FCKG0214 HOSE - OVERFLOW FCDC0009 RADIATOR LOUVER-CX65 HCSP0002 PUSH PIN - PLASTIC HCCN0000 5mm EXTRUDED "U" NUT ECC60063 HOSE RADIATOR UPPER ECC60012...
  • Page 18: Parts - Electrical System

    Parts – Electrical System Electrical System REF # PART # DESCRIPTION ICC60004 STATOR DIGITAL 65 HCBB0516 M5X16mm BUTTON HEAD (3 REQ’D) HCWF0501 5mm FLAT WASHER (3 REQ’D) ICC60003 ROTOR OUTER STYLE 65 HCWF0010 10mm FLAT WASHER HCNS1001 M10mm NUT ICC60006 CDI UNIT 65 ICMU0035 MOUNT - CDI...
  • Page 19: Parts - Engine Clutch

    Parts – Engine Clutch Clutch components REF. # PART # DESCRIPTION ECDC0063 CLUTCH WASHER (2 PLACES) ECDC0064 CLUTCH BUSHING – INNER / STEEL EAEX0003 CLUTCH BASKET ASSEMBLY ECDC0066 CLUTCH PRESSURE PLATE ECDC0068 CLUTCH DISC-FRICTION – (5 REQ’D) ECDC0067 CLUTCH DISC-STEEL – (4 REQ’D) ECDC0069 CLUTCH HUB ECDC0070...
  • Page 20: Parts - Engine - Clutch / Kick Cover

    Parts – Engine – Clutch / Kick Cover Clutch / Kick Cover Components REF. # PART # DESCRIPTION ECC60045 CLUTCH COVER ZCC60007 GASKET-CLUTCHCOVER HCBC0625 M6X25mm SOCKET HEAD CAP SCREW (6 REQ’D) HCBC0630 M6X30mm SOCKET HEAD CAP SCREW (2 REQ’D) HCFH0616 M6X16mm FLAT HEAD BOLT ECMU0250 WASHER –...
  • Page 21: Parts - Engine - Ignition Side

    Parts – Engine – Ignition Side Ignition side engine components REF. # PART # DESCRIPTION ECDC0085 IGNITION COVER ZCDC0004 GASKET-IGNITION COVER HCBC0402 M4X35mm SOCKET HEAD CAP SCREW (3 REQ’D) HCNS1001 M10 NUT HCWF0010 10mm FLAT WASHER ICC60003 ROTOR PVL OUTER STYLE ICC60004 STATOR PVL DIGITAL CX65 HCBB0516 M5X16mm BUTTON HEAD (3 REQUIRED)
  • Page 22: Parts - Engine - Kick Mechanism

    Parts – Engine – Kick Mechanism Kick Mechanism REF. # PART # DESCRIPTION ECC60066 SPACER – KICK SPRING CENTERING ECC60067 SPRING KICK START CX65 ECDC0036 SNAP RING, EXT.16mm - SPRING RET. ECDC0043 WASHER, KICKSTART BACKUP ECDC0042 SPRING, KICKSTART RAMP ECMU0171 SHAFT, KICK STARTER –...
  • Page 23: Parts - Engine - Shift Mechanism

    Parts – Engine – Shift Mechanism Clutch components REF. # PART # DESCRIPTION EADC0154 SHIFTER SHAFT (2 COMPONENTS) W/SPRING ECDC0055 SPRING – SHIFTER SHAFT ECDC0099 SPRING, CENTERING ECDC0110 SPACER, CENTERING SPRING HCBC1825 M8X25mm SOCKET HEAD CAP SCREW BLACK OXIDE HCWL0802 8mm LOCKWASHER, HI COLLAR ECMU0550 SHIFT CASSETTE (W/O PINS)
  • Page 24: Parts - Engine - Top End

    Parts – Engine – Top End Engine – Top End REF # PART # DESCRIPTION ECC60075 CYLINDER KIT (INCLUDES PISTON KIT) CX65 – 43mm BORE ZCC60116 BASE GASKET 0.15mm(.006”) ZCC60110 BASE GASKET 0.25mm(.010”) ZCC60115 BASE GASKET 0.40mm(.015”) ZCC60015 BASE GASKET 0.50mm(.020”) ZCC60030 BASE GASKET 0.80mm(.031”) ECC60389AB...
  • Page 25: Parts - Engine - Transmission

    Parts – Engine – Transmission Transmission REF # PART # DESCRIPTION ECEX0015 CRANKSHAFT CX65 STROKE 44.7mm ECDC0023 BEARING, CRANKSHAFT ECDC0024 SEAL, CRANKSHAFT EKEX0001 ROD KIT ACCESSORY EKC62010 ENGINE CASE SET W/B&S CX65 ECC60015 BUSHING ENGINE / SWINGARM PIVOT CX65 HCDP1401 DOWEL, SOLID CENTERING (2 REQ’D) ZCC60006 GASKET CRANKCASE CX65...
  • Page 26: Parts - Exhaust System

    Parts – Exhaust System Exhaust System REF # PART # DESCRIPTION XAC62010 EXPANSION CHAMBER XCMU0033 ISOLATION MOUNT (2 REQ’D) M6 CLIP NUT-PLASTIC/PIPE MNT (1 REQ’D FOR PIPE & 2 HCHA0003 REQ’D FOR SILENCER) HCBF0616 M6X16mm FLANGE HEAD BOLT (2 REQ’D) ZCMOTE11 O-RING –...
  • Page 27: Parts - Forks- Leg Assembly

    Parts – Forks– Leg Assembly Fork Leg Assembly REF # PART # DESCRIPTION KACX6527 FORK SET – CX65 KCC60004 BUSHING – TOP KKC60002 FORK SEAL, DUST COVER(SWIPER) KIT (1 EACH) KCC60011 CLIP RING KCC60012 BLEED SCREW WITH SEAL ZCMUOR16 O-RING – FORK CAP KCC60005 BUSHING –...
  • Page 28: Parts - Frame & Triple Clamps

    Parts – Frame & Triple Clamps Frame REF # PART # DESCRIPTION FACX0020 FRAME WELDED ASSEMBLY CX65 FAC60016 SUBFRAME CX65 HCBB0835 M8X35mm BUTTON HEAD SCREW (2 REQ’D) – TOP MOUNT HCFH0825 M8X25mm FLAT HEAD CAP SCREW – (2 REQ’D) BOTTOM MOUNT FCC60020 CHAIN ROLLER W/BEAR &...
  • Page 29: Parts - Front Wheel

    Parts – Front Wheel Front Brakes REF# PART # DESCRIPTION WAC6FR01B WHEEL 14” FRONT W BEARINGS (NO TIRE, OR TUBE,), BLACK WCDCHB01 HUB FOR CX65 – FRONT WCMU1400B 14” RIM, BLACK WCDC0002 SPOKE-FRONT WHEEL- CX65 WCDC0011 NIPPLE-SPOKE 9GA. STAINLESS WCC60008 AXLE FRONT CX65 WCMU0120 BEARING, WHEEL-SEALED...
  • Page 30: Parts - Front Brake

    ACCESSORY Note: The company that supplied this brake system to Cobra (AJP) is no longer in business, therefore, some parts are not available any longer. We still stock standard items such as brake pads, and there are aftermarket options for levers, however, internal components are not available. Cobra took great care when designing its new CARD brake system to ensure backward compatibility for older models.
  • Page 31: Parts - Bodywork

    Parts – Bodywork Plastic and Seat REF # PART # DESCRIPTION TCC60020 FRONT FENDER – YELLOW – STANDARD TCC60020BLK FRONT FENDER – BLACK TCC60020WHT FRONT FENDER – WHITE HCBF0616 FENDER BOLT, M6X16mm FLANGE HEAD BOLT (4 REQ’D) TCC60021 SPACER – FRONT FENDER BOLT (4 REQ’D) TCC60002 NUMBER PLATE –...
  • Page 32: Parts - Rear Brake

    Parts – Rear Brake Rear Brake System REF # PART # DESCRIPTION BAC60005 BRAKE ASSEMBLY REAR BCC60028 BRAKE MASTER CYLINDER CX65 8mm BCC60027 BRAKE LINE REAR CX65 BCC60029 BRAKE CALIPER CX65 BAC60006 BRAKE BRACKET HCBF0620 M6X20mm FLANGE HEX-8mm HEAD HCCC0005 BRAKE - HOSE GUIDE (2 REQUIRED) HCPP0832 #8X1/2 SELF TAPING SCREW (2 REQUIRED)
  • Page 33: Parts - Rear Wheel

    Parts – Rear Wheel Rear Wheel REF # PART # DESCRIPTION WHEEL 12" REAR W BEARINGS (NO TIRE, TUBE, ROTOR OR SPROCKET), WAC6RR01B BLACK WCC6R012D TIRE – DUNLOP- 80/100-12 MX51 WCDCTU12 TUBE-275-80/100-12 REAR WCMU1200B 12" RIM, BLACK WCDCHB02 HUB FOR CX65-REAR WCDC0003 SPOKE-REAR WHEEL-65 (32 REQ’D) WCDC0011...
  • Page 34: Parts - Shock

    Parts – Shock Shock REF # PART # DESCRIPTION SAC62011 SHOCK ABSORBER – CX65 SCMU0043 SHOCK - BEARING SPHERICAL SHOCK MOUNT–CARD (2 REQ’D) SCMU0039 O-RING - SHOCK - BUSHING – CARD (4 REQ’D) SCMU0042 SHOCK - MOUNT BUSHING – CARD (4 REQ’D) SCMU0058 SHOCK - WHITE NYLON TIP SETSCREW M6-1.0 - CARD SCMU0056...
  • Page 35: Parts - Shock - Inside

    Parts – Shock – Inside 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 36: Parts - Swingarm Assembly

    Parts – Swingarm Assembly Swingarm REF # PART # DESCRIPTION GACX6511 SWINGARM ASSY ALUMINUM GCC60015 BOLT - SWINGARM PIVOT HCWF1202 12mm WASHER – SWINGARM PIVOT HCNL1201 M12 LOCK NUT – SWINGARM PIVOT GCC60002 SWINGARM BUSHING 65 (4 REQ’D) GCC60001 SWINGARM PIVOT TUBE SPACER 65 (2 REQ’D) TCC60004 CHAIN SLIDER TOP FOR SWINGARM HCPP0832...
  • Page 37: 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 38: 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 39: Fuel & Air System

     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 (piston rings can be left off to ease assembly).
  • Page 40 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 41 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 (PR2, MCR, etc..) for questions and service of your CX65shock.
  • Page 42 Shock preload Shock Damping...
  • Page 43: Tuning

    Tuning Gearing Rear Gear Front Sprocket Sprocket Ratio 2.47 2.53 2.60 2.64 2.67 2.71 2.73 2.79 2.80 2.85 2.86 2.87 2.92 2.93 2.93 3.00 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...
  • Page 44 Suspension Adjustment: 1. Front forks 1.1. Fork oil 1.1.1. Oil type 1.1.1.1. Heavier weight oil – more damping – slower responding 1.1.1.2. Lighter weight oil – less damping – quicker responding 1.1.2. Oil quantity / level 1.1.2.1. Greater quantity / higher level – greater bottoming resistance, stiffer near the end of the travel.
  • Page 45 Carburetion 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 46 NOTE: 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...
  • Page 47 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.
  • Page 48 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 49 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).
  • Page 50 Index Air Filter Maintenance ....12 Parts .......... 31 Fuel System Bars and Controls ......16 Parts list ........40 Base Gasket Selection ....38 Service ........40 Break-In .......... 6 Hardware Carburetor Frame ........30 Parts .......... 17 Plastic ........32 Service ........
  • Page 51 Exhaust ........28 Spark Plug Frame ........30 Recommended ......3 Front Brake ....... 31 Specifications ........3 Plastic & Seat ......32 Starting ..........7 Rear Brake ........ 33 Stator Rear Wheel ....... 34 torque .......... 5 Shock ........35 Suspension ........

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