Automotive Manual PDF

This kit is intended for use on 1993 and newer XR/CRF100’s using CDI ignition. Engine assembly requires special attention to detail. A new BBR Cylinder and piston kit have been supplied. The following measurments are critical to proper installation and performance.
Ring end gap: .012″ - .015″
Valve clearance: Intake: .002″ Exhaust: .003″
Piston to head clearance: .040″
(more…)

[Read more →]