for race engines, without positioning marks in the camshaft. (A-B) homologation tolerances on all camlobes. ON SPECIAL DEMAND ONLY
Distance between valve and piston should be 1.0mm at least:
check 5-15° after TDC on intake
check 5-15° before TDC on exhaust
Machine pistons if required. Wrong installation can cause severe engine damage!
ONLY for use in competition engines with independent engine management (throttle position sensor) or carburettors