CCM 644 Main Jets


Please remember that there are 2 carbs = 2 of each jet required. 

When replacing the standard silencer with a race item, we advise the following jetting:

  • 135 Main jets/25 Pilot Jets - Air box lid kept on
  • 150 Main jets/25 Pilot Jets - Air box lid removed
For use with a race silencer with the air box lid removed.
Standard main jet.

For use with a race silencer but keeping the air box lid on.

Main jet suitable for the 710cc big bore kit and the airbox lid removed.