Knucklehead Top End

Knucklehead VALVE GUIDES

Standard OD: .6438"

GUIDE fit in head: .001" - .002" press fit

Knucklehead VALVES

HEAD diameter: 1-3/4"

SEAT ANGLE: 45 degree

VALVE Length - Inlet: 3.565"

VALVE Length - Exhaust: 3.730"

STEM diameter: In .3745" Ex .374"

STEM Clearance in Valve Guide: .004" - .006" (use larger tolerance on Exhaust)

Valve Guide REAMS: .378" - .380"

Pushrod to Tappet Clearance (Cold): Noticeable Play - Freely Spins