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Engine is Fresh
Measured Value
Engine Down on Power
Measured Value * 0.9
Engine NEEDS Rebuilt
Measured Value * 0.8
Example
110 psi 110 psi * 0.9 = 99 psi 110 psi * 0.8 = 88 psi
Your Values
Procedure for Compression Testing
1. Shut off the fuel petcock.
2. Install the compression gauge into the spark plug hole.
3. Hold the throttle to wide open, and kick repeatedly (approximately 20 times)
or until the gauge reading does not increase in value with each kick.
E1: Engine Removal
To service the bottom end and transmission, the engine must be removed from
the frame.
Tools required
• 5/16”, 10, 14, 22 mm socket
• 10, 13, 22 mm wrench
• 10, 17 & 19 mm sockets
• 9/64”, 3,4 & 5 mm hex key (Allen wrench)
• 7 mm nut driver, flat or Phillip, screwdriver for hose clamps
• Spring remover
• Flywheel / clutch puller (#MCMUTL68)
• Clutch nut removal tool (Call local dealer for details).
Procedure
1. Remove the seat (4mm hex key).
2. Turn of the fuel at the petcock and disconnect the fuel line.
3. Remove the tank (5 mm hex key & 10 mm socket).
4. Remove the carburetor from the inlet (flat head or Phillips head screwdriver, 7
mm nut driver).
5. Remove the right side number plate (3mm hex key).
6. Remove the silencer & pipe (spring remover, 5mm hex, & 10mm wrench).
7. Disconnect the ground wire from the reed cage with a 5 mm hex key
(depending on your ultimate repair, you may want to reinstall the fastener in
the inlet.
8. Leaving the coolant lines connected to the engine, remove the radiator from
the frame (5mm hex with 10 mm wrench).
9. Remove the master link from the chain.
10. Remove front engine mount bolt (13 mm socket, 6 mm hex key).
11. To access the swingarm bolt, remove brake lever (13 mm wrench, 5 mm hex
key).
12. Remove the swingarm bolt (22mm socket & wrench).