CRF Valve Shim Calculator
to shim your Honda CRF450R valves to their correct
tolerances? Use this valve shim calculator to make
the job easy. It's set up with shim specs for the
CRF450 but you can change those and use this calculator
for the Honda CRF250R and CRF250X as well. It also
has the Honda part numbers for all the available shims.
Here to check it out!