This kit replaces the stock accelerator pump cover, diaphragm, plunger rod, spring and o-rings. This is the updated '08 version for better off-idle performance.
NOTE: For those models with the check valve in the float bowl you'll need to remove this or reuse your original accelerator pump cover. CRF's Only exclusive how-to will show you how to install this kit. Click Here For CRF150R installations you will not install the included plunger rod.