The CVT system in your scooter or moped automatically designates the gearing ratio for the transmission, in concert with to the engine's RPM and wheel speed. The CVT adjusts the transmission's gearing ratio in order to increase the moped's speed, under acceleration. After continuous use, the CVT drive belt for your moped will stretch or possibly fail. Checking and replacing your CVT drive belt will reduce the likelihood of a roadside breakdown caused by transmission failure. Replacing the CVT drive belt requires a few simple tools to complete.
- Skill level:
- Moderately Easy
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Things you need
- Ratchet and socket set with extension
- One-inch wide piece of cardboard
- Aerosol automotive parts cleaner
- Replacement belt
Secure the moped on the centre stand. Consult your moped's manual if you are unsure how to do this, since it may vary by model.
Remove the outer CVT case bolts using an appropriate size socket with ratchet extension. The CVT case is found on the lower left-hand side of the moped, between the engine and rear wheel.
Remove the CVT case. This will expose the front variator pulley, drive belt and rear clutch pulley. Use both hands to compress the outermost pulley on the rear clutch and push the drive belt toward the middle of the pulley, creating a sufficient amount of slack.
Hold the front variator pulley in position, toward the engine, while looping the drive belt over the fan pulley. Insert a 1-inch piece of cardboard between the variator pulley and fan pulley. Wedging the cardboard between the two pulleys will keep the internal roller weights inside the variator mechanism intact.
Remove the drive belt from the rear pulley.
Clean the debris left by the old drive belt from the inner and outer CVT case, using aerosol parts cleaner for automotive applications. Failure to clean out the debris present inside the CVT case may cause premature wear on the new drive belt.
Loop the new drive belt over the rear clutch pulley. Compress the outermost pulley half on the rear clutch and push the drive belt toward the middle.
Hold the variator pulley against the engine and remove the piece of cardboard. Loop the drive belt over the fan pulley. Rotate the rear clutch pulley to properly seat the drive belt within the CVT system.
Reinstall the outer CVT cover to finish the belt replacement process.
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