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61

1.  Changing the main jet to a smaller number. 
2.  Raising the needle clip (this lowers the jet needle) one notch at a time on the 

slide.   

 
Indications that the engine is running too lean are: 

• 

Engine cutting out on top end. 

• 

Engine overheating and ultimately seizure. 

• 

White spark plug 

 
CAUTION: 
It is much safer to operate the engine slightly rich as opposed to slightly lean. 
This is because an overly rich engine will just run poorly while an overly lean 
engine will seize, potentially causing an expensive top end rebuild and a DNF. 
 
To richen the carburetor:  
1.  Change the main jet one number at a time (larger). 
2.  Lower the needle clip (raising the jet needle) one notch at a time until the 

engine starts to blubber on the top end, then move the clip back up one notch 
or until you get the blubber out. 

 

 
FUEL MIXTURE SCREW 

The smaller brass screw that is towards the front of the engine is a fuel mixture 
screw.  This screw will also richen and lean your engine more on the bottom and 
mid-range.  In warmer conditions, turn the screw in.  In colder conditions, turn the 
screw out.   Be sure to keep the carburetor very clean and make sure you don't 
have water or dirt in the carburetor bowl. Use automotive carburetor cleaner or 
WD-40 to clean the carburetor inside and out.  
 

STOCK CARBURETOR SETTINGS 

The 2008 CX50 SR stock carburetor settings from the factory are: 

• 

60 pilot jet 

• 

95 main jet 

 
Cleaning the carburetor:

 

 

 

Clean the carburetor in a well-ventilated area, and take care that there is no 
spark or flame anywhere near the working area; this includes any appliance with 
a pilot light.  Because of the danger of highly flammable liquids, do not use 
gasoline or low flash-point solvent to clean the carburetor. 
 
1.  Make sure the fuel is shut off. 
2.  Remove the carburetor. 
3.  Drain the fuel from the carburetor. 

Содержание CX50 BW 2010

Страница 1: ......

Страница 2: ...losest Cobra dealer log on to www cobramotorcycle com or call 517 437 9100 If you need technical assistance contact your local dealer or call the Cobra Technical Support Hotline at 517 437 9100 Cobra...

Страница 3: ...ED 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...

Страница 4: ...BRAKE MAINTENANCE 14 AIR FILTER CLEANING 16 FORK OIL REPLACEMENT 19 FRICTIONAL DRIVE CFD 20 PARTS 21 PARTS AIRBOX INLET SYSTEM 21 PARTS BARS AND CONTROLS 22 PARTS CARBURETOR 23 PARTS COOLANT SYSTEM 24...

Страница 5: ...GINE SERVICE 42 Base Gasket Selection 43 Engine Removal 45 Complete Engine Disassembly Procedure 45 Top End Disassembly Procedure 46 Splitting the Cases 47 Engine assembly 47 CLUTCH 49 IGNITION 55 COO...

Страница 6: ...on 8339 1 8332 1 hotter 8904 1 colder Gap 0 023 0 025 0 58 0 64 mm Ignition timing 0 035 0 9 mm Before Top Dead Center BTDC Fuel type High octane pump gasoline RACE FUELS ARE NOT RECOMMENDED Premix Oi...

Страница 7: ...or the factory for details Carburetor jets reeds Flat clutch washers see clutch service section Pre filter for the airbox Sprockets o Front o Rear Suspension Springs Weight of Rider lb Fork Spring Sho...

Страница 8: ...8 M5 x 0 8 Water Pump Pulley 10 124 14 M6 x 1 0 Intake manifold bolts 4 6 55 6 2 M6 X 1 0 Rear Axle Bolt 25 300 34 M12 X 1 25 Rear Sprocket Bolts 18 216 24 7 mm Fork cartridge rod 12 144 16 Triple cla...

Страница 9: ...but spin the rear wheel good at least once or twice per minute Allow bike to cool Ride for 15 minutes maximum avoid prolonged high RPM operation and avoid abusing the clutch with throttle blipping Coo...

Страница 10: ...plete the distance required High octane pump gas with Motul 800 2T premix oil Turn the fuel on by rotating the fuel petcock knob to the vertically downward position reserve position is horizontally fo...

Страница 11: ...le Tips 1 Recommended lubricants a Cobra Clutch Milk is by far the best auto clutch lubricant It is a full synthetic lubricant that has been specifically formulated for Cobra s auto clutch and has Exc...

Страница 12: ...sary o Insure the smooth operation of the throttle cable throttle soundly clacks shut o Check for frayed strands of the throttle cable inside the throttle housing and replace if necessary o Check for...

Страница 13: ...down while retightening the six screws starting for the center and working out 5 Inspect CFD slip torque every 10 hours of riding or replace the friction papers and the load spring Bellville spring ev...

Страница 14: ...More than 350 ml 12 oz will degrade engine performance NOTE Lean bike over onto it s left hand side so that the clutch cover is up unless you have a squeeze bottle 6 Reapply the oil fill plug hand tig...

Страница 15: ...e adjustor bolts clockwise CW or loosen the chain by rotating the adjustor bolts CCW 4 Retighten the axel bolt to 25 ft lb 34 Nm 5 Retighten the adjustor bolt Figure 3 CAUTION Always check rear brake...

Страница 16: ...is installed such that one must push forward toward the front of the bike to remove Otherwise the clip is apt to come undone while riding To adjust see figure 2b 1 Loosen the lock nut 10mm 2 Undo the...

Страница 17: ...cles from the airbox between the filter location and the carburetor NOTE Cobra has available a carburetor cover that allows easy cleaning of the airbox 1 Remove the air boot 2 Install the cover RCMU01...

Страница 18: ...ilter and reinstall Figure A2 5 Squeeze the two finger tabs together on the wire retainer and install into the airbox as in figure A2 6 Push the wire retainer down until it bottoms making sure the two...

Страница 19: ...s did not make it into the holes Realign and try again 8 When properly installed the filter and retainer should look like figure A4 Figure A4 NOTE Make sure you change or clean your filter after each...

Страница 20: ...ng d Place upside down over a suitable pan tray or container e Work the damper rod up and down several times f Allow it to drain completely Assembly procedure 1 Fill the fork leg with 3 6oz 107 ml 5 w...

Страница 21: ...lutch by draining the oil and removing the cover exposing the CFD Next brace the CFD gear from turning with a suitable device Cobra tool EAMU0004 or similar Using a beam style torque wrench turn the t...

Страница 22: ...FILTER 6 TCC61008 MUDFLAP 2010 SR 7 MCKGHO03 HOSE CLAMP AIRBOX TO BOOT 8 RCKG0505 AIR BOOT 9 MCKGHO01 HOSE CLAMP BOOT TO CARB 10 MCKGHO04 HOSE CLAMP CARB TO MANIFOLD 11 ECKG0203 INLET MANIFOLD 12 ECK...

Страница 23: ...LEVER W BALL 6 BCKG0024 BRAKE PERCH ASSY W LEVER BALL NOT SHOWN BAKG0004 SHIELDED BRAKE HOSE ASSEMBLY 7 FCMU0019 THROTTLE CABLE 8 HCBC0806 SOCKET HEAD CAP SCREW M8 X 30 4 PER 9S TKMU0404M BAR MOUNT KI...

Страница 24: ...NG 15 RCMU0028 NEEDLE RETAINER PLATE 16 RCMU0007 NEEDLE CLIP 17 RCMU0204 CHOKE ASS Y 2001 CM 20 RCMU0009 FUEL MIXTURE SCREW 21 RCMU0011 IDLE ADJUSTMENT SCREW 25 RCMU0103 FLOAT BOWL GASKET 26 RCMU0107...

Страница 25: ...OP LEFT 4 ECCS0010 RADIATOR HOSE BOTTOM RIGHT 5 MCC6GR01 GROMMET RADIATOR MOUNTING 6 HCBF0612 6X12MM FLANGE HEAD BOLT 2 REQ D 7 HCWF1478 FLAT WASHER 2 REQ D 8 MCMUCL07 HOSE CLAMP 4 REQ D 9 FCKG0214 RA...

Страница 26: ...M5X16 SHCS 2 REQ D HCWF0501 5MM FLAT WASHER 2 REQ D 5 HCCN0000 5MM CLIP NUT MAY NOT BE USED 6 ICMU0018 STATOR WITH GROMMET 7 HCBC0535 5mm x 35 SOCKET HEAD CAP SCREW 2 REQ D 8 HCBC0525 5mm x 25 SOCKET...

Страница 27: ...T SHAFT TRANSMISSION WITH GEAR 12 ECMU0100 SECONDARY SHAFT TRANSMISSION WITH GEAR 13 ECMU0001 BEARING TRANMISSION SECONDARY SHAFT 14 ECKG0031 BEARING OUTPUT SHAFT RIGHT SIDE 15 HCBH0612 M6X12 HEX HEAD...

Страница 28: ...ATE WITH FRICTION MATL 08 STYLE 13 ECMU0138 FRICTION RING BRASS CFD 14 ECMU0166 GEAR CFD 08 STYLE 15 ECMU0159 SPRING WASHER CFD 60MM OD 16 ECMU0169 CENTERING WASHER CFD V2 17 HCNS1202 NUT CFD 20 LEFT...

Страница 29: ...IMPELLER WATER PUMP ALUMINUM 6 ECKG0004 RETAINER WATER PUMP ASSEMBLY MAY NOT BE NEEDED 7 HCBC1512 5X12MM SHCS STAINLESS 8 ECMU0167 BEARING WATER PUMP BIG 9 ECKG0175 WATER PUMP PULLEY FAN TYPE DRIVEN 1...

Страница 30: ...D 7 ECKG0012 WRIST PIN 8 ECMU0077 BEARING WRIST PIN 9 ZCMUOR07 O RING EXHAUST FLANGE 10 ECMU0086 EXHAUST FLANGE NOT SHOWN ZCMOTE11 O RINGS PIPE TO FLANGE 2 REQ D 11 HCBC0612 M6X12 EXHAUST FLANGE SCREW...

Страница 31: ...12 M6X12 FLANGE HEAD BOLT 6 HCBF0616 M6X16 FLANGE HEAD BOLT 7 HCHA0003 6MM CLIP NUT FOR FRONT PIPE MOUNT 8 HCWF1478 PIPE GROMMET WASHER 2 REQ D 9 XCMU0032 SILENCER NOT SHOWN XCMU0026 SILENCER PACKING...

Страница 32: ...NUT 2 REQ D 10 FCMU0151 CAP STEERING STEM 11 HCBC0806 CAP SCREW M8X30 4 REQ D 12 TCMU0404 BAR MOUNT KIT SHORT 2 REQ D TCMU0403 BAR MOUNT KIT TALL 2 REQ D 13 HCBC1001 M10X45 SOCKET HEAD CAP SCREW 2 REQ...

Страница 33: ...SPRING 11 HCNJ0038 NUT DAMPER ROD 12 KAKG0001 DAMPER ROD ASSEMBLY 13 KAKG0027 MID VALVE ASSEMBLY STANDARD 14 KCCS0001 CARTRIDGE CAP 15 KCKG0054 DAMPER TUBE CARTRIDGE 5 star 16 KAKG0024 BASE VALVE ASSE...

Страница 34: ...SHER 5MM BODY PANEL HCBC0514 M5X14 SHCS 5 MCC6GR01 GROMMET RADIATOR MOUNTING HCBF0612 6X12MM FLANGE HEAD BOLT 2 REQ D HCWF1478 FLAT WASHER 2 REQ D 6 HCBH1203 SWINGARM PIVOT BOLT 12MM HCNL1201 SWINGARM...

Страница 35: ...HCBC0514 M5X14 SHCS 2 REQ D HCWP0002 WASHER BODY PANEL FLAT 2 REQ D 4 MCMUGR03 MOUNTING GROMMET 4 REQ D TOTAL 2 PER BOLT TCKG0001 SPACER 2 REQ D HCBF0630 M6X30 FLANGE HEAD BOLT 2 REQ D HCWF1478 PIPE...

Страница 36: ...6 X 20 FLANGE HEAD BOLT 12 WCMUZT04 CABLE TIES 2 REQ D TO SECURE BRAKE LINE TO FORK GUARD 13 BCKG0031 BLEED KIT MULTIPLE SYRINGES FITTINGS HOSE 14 BRAKE FLUID DOT 4 ONLY ACCESSORY BCKG0028 LEVER ADJUS...

Страница 37: ...N WCCSBW11 NIPPLE SPOKE KING BIG WHEEL 4 BCMU0503 BRAKE ROTOR 5 HCBC0501 BRAKE ROTOR MOUNTING BOLTS 6 REQD 6 WCKG0011 FRONT AXLE 7 HCWF1202 FRONT AXLE WASHER 8 WCCSBW06 SPACER FRONT BRAKE SIDE 9 WCCSB...

Страница 38: ...0018 SPECIAL WASHER SEAT HOLDING HCBC0625 M6X25 SHCS REAR MOUNTING BOLT 7 TCC60022 SHROUD LEFT YELLOW TCC60022xxx xxx DENOTES COLOR BLK BLACK BLU BLUE WHT WHITE HCSP0003 PLASCREW 1 REQ D MOUNT SHROUD...

Страница 39: ...r 11 BCC60005 REPLACEMENT BRAKE HOSE 12 HCBF0635 M6X35 FLANGE HEAD BOLT 13 HCBF0620 M6X20 FLANGE HEAD BOLT 14 BCKG0013 CALIPER REAR BRAKE 15 BCKG0103 BRAKE CARRIER WITH PAD 16 BCKG0006 WHEEL SPACER FL...

Страница 40: ...AXLE HEAD FIXING PLATE 9 WCCSBW01 SPACER REAR SPROCKET SIDE 10 WCCSBW05 SEAL BEARING SPROCKET SIDE 11 WCCSBW02 BEARING SPROCKET SIDE 12 WCCSBW03 BEARING SPACER REAR 13 WCCSBW12 BEARING BRAKE SIDE 14...

Страница 41: ...RING SCKGFX37 SHOCK SPRING 3 7 KG MM MED SCKGFX35 SHOCK SPRING 3 5 KG MM LIGHT 4 SCKGFX39 SHOCK SPRING 3 9 KG MM HEAVY STANDARD BIG WHEEL 5 SCKGFX03 SPRING RETAINER BOTTOM 6 SCKGFX01 COLLAR SHOCK END...

Страница 42: ...E HOSE CLAMP 2 REQ D for hose with clear cover 13B HCCC0006 BRAKE HOSE CLAMP 2 REQ D for hose with black cover 14 HCPP0832 BRAKE HOSE CLAMP FASTNER 2 PER 15 HCBF1040 M10 X 40 LOWER SHOCK MOUNT BOLT 16...

Страница 43: ...20 before you establish the most accurate reading possible Because of the geometry of the spark plug used in this Cobra Motorcycle the adapter used with your compression tester must have a similar vol...

Страница 44: ...er head and piston at TDC and there are negative effects of either having too much or too little clearance Since parts like the crank connecting rod cylinder head piston and crankcases all have varyin...

Страница 45: ...the spark plug and ignition cover piston rings can be left off to ease assembly Carefully insert the solder wire though the spark plug hole into the cylinder far enough such that the tip of the wire...

Страница 46: ...g remover 8mm socket 6 Locate a suitable container for the engine coolant and disconnect the coolant lines connected to the engine 8 mm socket NOTE If the coolant looks to be free of contaminates it m...

Страница 47: ...inder bore for abrasions deposits and missing coating 1 If abrasions scrapes scratches pitting etc are found replace the cylinder 2 If deposits are all are found a Clean with muratic acid b Once the d...

Страница 48: ...ne professionally CAUTION If you split the cases check the gear tooth faces for chipping signs of fatigue Check the small needle bearings for fatigue If the bearings are damaged the engine cases shoul...

Страница 49: ...ation 11 Install the piston with new wrist pin bearing and pin and clips CAUTION Be sure to install the piston such that the arrow on the top piston surface points to the exhaust front of bike engine...

Страница 50: ...ion with the engine resting on a bench 24 Install the CFD 25 Install the clutch per Clutch Installation section in this manual 26 Install the coolant drain plug with copper washer 11 ft lb 15 Nm 27 Ma...

Страница 51: ...your overall combined spring stack accordingly i e if your effective shoulder length is 0 5mm short of the 16 00 measurement decrease the overall combined spring stack height by 0 5mm or if your shoe...

Страница 52: ...knowledge sake but don t blindly restack washers to different heights without first consulting the factory Cobra clutch puller assembly Figure 30 Figure 31 Clutch puller installation Tools recommende...

Страница 53: ...prings and flat washer s configured as a 5 stack See figure 32 This clutch is designed such that it reconfigured by the customer to achieve different clutch engagements hits by changing washer counts...

Страница 54: ...t washers Replace the stock washer with the proper combination of adjustment washers that delivers the desired clutch hit CAUTION It is easy to prematurely damage the clutch and other engine component...

Страница 55: ...ndard 0 030 0 76mm ECMU0040T Clutch to hub spacer thin 0 015 0 38mm 3 ECMU0119 Needle bearing 4 ECMU0120 Clutch basket with bearing 5 CAMU0005 Clutch Complete w Arbor 6 ECMU0018 Clutch nut CCMU0029 Cl...

Страница 56: ...ds and install the nut and torque to 40 ft lb 54Nm with the special socket see figure 33 CAUTION Use high strength red thread locker on the threads of the clutch nut If you are using an impact socket...

Страница 57: ...ections are free of dirt CAUTION Advancing the ignition timing will cause the engine to run hotter in turn causing power loss shortened clutch life and possibly lead to premature stator failure and ca...

Страница 58: ...the engine cases NOTE Inspect the old coolant for evidence of oil combustion byproducts black oil slick stuff or other things that may indicate a problem Tools recommended for impeller service Flat he...

Страница 59: ...mmer onto the end of the water pump shaft and remove the assembly NOTE It is quite common for the older plastic impellers to fall off the end of the shaft during this step of the process if that is th...

Страница 60: ...ad is oriented toward the stator 10 Hold the installation tool firmly against the engine case and tap on the end of the water pump shaft with a dead blow hammer until the insertion punch is needed 11...

Страница 61: ...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 IDLE ADJUSTMENT On the left side...

Страница 62: ...FUEL MIXTURE SCREW The smaller brass screw that is towards the front of the engine is a fuel mixture screw This screw will also richen and lean your engine more on the bottom and mid range In warmer c...

Страница 63: ...le and choke knob oriented as shown Reeds If the reed is damaged in any way replace it This means cracks chips and ruptures Anything abnormal replace the reeds NOTE If you are having difficulties gett...

Страница 64: ...arbon build up is created from exhaust Exhaust has oils in it and the oils cling to the walls of the inside of the pipe Over a long period of time the diameter of the pipe will decrease due to carbon...

Страница 65: ...It a correction is needed Cobra has thin brake shims to help make minor adjustments in alignment Always leave adequate free play in the lever or pedal CAUTION This brake system uses only DOT 4 or 5 1...

Страница 66: ...into groove on lower fork leg 6 Slide the bushing over the glide ring about 1 4 to hold the glide ring in the groove 7 Insert the lower leg assembly into the upper fork tube about 5 6 8 Use a seal dri...

Страница 67: ...rious suspension options See Optional Components section of this manual for details on these and other optional components for your Cobra Motorcycle Rear Shock The rear shock is fully serviceable but...

Страница 68: ...off idle ii Motorcycle moves but not with much power iii Clutch fully engages before the power band kicks in 2 Things to measure that can have an effect a Spring washer configuration b Spring stack wi...

Страница 69: ...is too short iv Clutch shoe material has worn too thin v Clutch basket has worn too much and is too large of a diameter With the exceptions of component failures generally two things will occur 1 The...

Страница 70: ...re Gearing For a bike with a centrifugal clutch it s better to be geared too low than too high What happens with improper gearing Poor performance Not enough top end speed No snap Over heat clutch Pre...

Страница 71: ...2 43 15 37 2 47 14 35 2 50 15 38 2 53 13 33 2 54 14 36 2 57 15 39 2 60 13 34 2 62 14 37 2 64 15 40 2 67 13 35 2 69 14 stock 38 2 71 15 41 2 73 13 36 2 77 14 39 2 79 15 42 2 80 13 37 2 85 14 40 2 86 1...

Страница 72: ...k spring 2 2 1 Stiffer spring stiffer throughout the travel 2 2 2 Less stiff spring less stiff throughout the travel 2 3 Compression damping 2 3 1 Harder more damping slower adds resistance to the sus...

Страница 73: ...Proactive Suspension Adjustments Once you have the suspension adjusted for decent overall feel you can make proactive adjustments when faced with different racing conditions Situation Actions Sand tra...

Страница 74: ...stments Condition Mixture will be Required adjustment Cold air Leaner Richer Warm air Richer Leaner Dry air Leaner Richer Very humid air Richer Leaner Low altitude Standard None High altitude Richer L...

Страница 75: ...adjustment To raise the idle turn the screw in clockwise in 1 4 turn increments and rev the engine after each adjustment To lower the idle turn the screw counter clockwise TOP END JETTING Adjust for c...

Страница 76: ...case gasket 2 Engine is down on power a Clutch engagement is not set properly b Jetting is incorrect c Silencer needs repacked d Exhaust pipe i Has excess carbon buildup ii Has large dent in it e Com...

Страница 77: ...idle a Idle knob needs adjusted b Carburetor jets are dirty Index Air Filter 16 Bars and Controls 22 Base Gasket Selection 43 Break In 8 Carburetor Parts 23 Service 60 Specifications 5 CFD Cobra Frict...

Страница 78: ...me 33 Front Brake 35 Front Wheel 36 Ignition Water Pump 28 Plastic Seat 37 Rear Brake 38 Rear Wheel 39 Shock 40 Swingarm 41 Top End 29 Triple Clamps 31 Plastic Seat Parts 37 Pullers 63 Rear Brake Adju...

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