Compression Test

Compression Test

You will need a compression tester:

Step 1: Remove the spark plug wire(s)

Step 2: Remove the spark plug(s)

Step 3: Screw in the compression tester hose in to the spark plug hole

Step 4: Now you want to hold the throttle at full throttle and kick start or push the start button continue until you get you're reading. Repeat 5 times to see if the results match. If there is more then one cylinder repeat for the rest of them.

Step 5: Compare you're results to the spec. in the service manual. If you have more than one cylinder the maximum allowable difference between cylinders can only be a 10% difference. 

Chain Slack Inspection and Adjustment for a Dirtbike

Chain Slack Inspection and Adjustment for a Dirtbike

Inspection

Step 1: Start by putting your bike on a stand so that the back wheel is off the ground.

Step 2: Measure the chain to do this push up on the chain and measure at the back of the chain slipper on the swing arm.

• Chain slack standard should be: 52-62 mm (2.05-2.44 inches) 

Adjustment

Step 1: Loosen the rear axle nut.

Step 2: Loosen the chain adjuster locknuts on both the right and left side.

Step 3 Loose Chain: If the chain is loose turn both adjusting bolts evenly counter clockwise until you have the slack that you want and make sure to align the marks on the axle blocks with the markings on the swing arm.

Step 3 Tight Chain: If the chain is to tight turn both adjusting bolts evenly clockwise until you have the slack that you want and make sure to align the marks on the axle blocks with the markings on the swing arm.

Step 4: Tighten both chain adjuster locknuts

Step 5: Tighten the rear axle nut

Step 6: Remeasure the chain slack

Disassemble and Reassemble a Carburetor

Disassemble and Reassemble a Carburetor

Disassemble

Step 1: Remove top cover to do this remove the screw.

Step 2: Then remove the slide and the jet needle.

Step 3: Turn the carburetor upside down and remove the screws on the float bowl and remove the float bowl.

Step 4: Remove the main jet, emulsion tube, and pilot jet. Once they are removed be sure to check the sizes of the jet with the spec. in the service manual.

Step 5: Before you remove the float measure the float height and write in down to check with the spec. then remove the float and float valve by pulling the pin out.

Step 6: Now screw in the pilot screw an count how many turns it takes and write it down. Then remove the pilot screw.

 Reassemble

Step 1: Screw in the pilot screw all the way then turn the screw out to what the spec. is in the service manual.

Step 2: Install the float an float valve and insert the pin to hold them in place. Then measure the float height to make sure its still set to spec.

Step 3: Install the emulsion tube, main jet, and pilot jet.

Step 4: Install the float bowl an tighten the screw. Be sure to not over tighten

Step 5: Reinstall the slide and the jet needle

Step 6: Reinstall the top cover and tighten the screws. Be sure to not over tighten.