Tools to service the CFD

An improperly adjusted CFD can cause many problems, including bad starts, slipping, overheating, and loss of power.    It should be checked every time you change the Cobra Milk.   These are the first tools that a new Cobra owner should have.

MCMUTL40 - CFD CHECK STOP PIN

In the Venom engine, you remove the oil fill plug, and screw this in its place. With the check pin in place, use the sprocket socket to check the torque. Sorry, but this will not work in the Classic Pre-Venom engines

EAMU0004 - Gear Stop (Red Gear Jammer)

With the clutch cover off, insert the gear stop in the space between the gear and the case. This will allow you to use the sprocket socket to check the torque. Works in both the Venom and Classic engines.

MCMUTL18 - Sprocket Socket

This is one of 3 tools needed to service the CFD in your Cobra. In conjunction with the gear stop or the check pin, you attach this to your output shaft and your torque wrench,  and try to "break" the slipper clutch. If it slips below 80 ft/lbs, you will need to tighten the slipper. Be sure to use a new cotter pin each time.

Tools to service the 50cc clutch

It is very important to keep the clutch in good working order if you want that holeshot!   A slipping clutch will take away performance and cause overheating.   Don't forget to measure the drum - Max ID is 84.15mm.   For best results and max clutch life, always use Cobra Milk.

ECMU0078 - Clutch Nut Socket

This tool fits the clutch nut on all 50cc engines. Be sure that when you replace the nut, you use blue loctite and tighten to 40 ft/lbs.

MCMUTL70 - Clutch and Ignition Rotor Puller

This tool is used to remove both the clutch assembly and the ignition rotor. To pull the clutch, place the bump-end against the crankshaft, and use 3 of the side cover screws to attach it to the clutch arbor. Turn them each 1/2 a turn to evenly pull the clutch off the end of the crank. Use the other end and 2 side cover bolts to remove the ignition rotor.

MCMUTL03 - Piston Stop Tool

To stop the engine from turning while you remove the clutch nut, remove the spark plug and screw the piston stop tool into the cylinder. Slowly rotate the engine until the piston makes contact with the tool. Remove the clutch nut using hand tools - NEVER USE AN IMPACT OR AIR TOOL.

65cc Engine Tools

The Cobra 65 is a complex engine that also requires some special tools.   

EAMU0006 - 65 Crank Puller

The 65 crank is a press fit. This tool will facilitate the installation of the 65 crank by pulling it into the press-fit bearing.

MCMUTL25 - 65 Flywheel Puller

This is the only way to remove the 65 flywheel without damaging it or the crank. The Cobra 65 uses a specific thread that is not readily available in generally available tools.

EAMU0007 - 65 Case Splitter

This tool will split the cases of the 65 engine. This engine has pressed fit crank bearings and this tool will push the crank through the bearing while splitting the cases.

MCMUTL19 - Powervalve Diagnostic Harness

This tool is used to measure the voltage opening the power valve.    Connect this harness between the stator and the solenoid, and the other end to your meter.     

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