Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Valve Seat

Minimum Dimension For Calculating Valve Seat Refacing Dimension:

MINIMUM DIMENSION (Valve Stem to Head):
Intake: 33.8 mm (1.331 in.)
Exhaust: 34.1 mm (1.343 in.)

Valve Seats:

VALVE SEAT DIMENSIONS:
Diameter (a):
Intake: 37.2 mm (1.465 in.)
Exhaust: 32.4 mm (1.276 in.)
Maximum Permissible Refacing Depth (b): calculate
Seat Width (c):
Intake: approx. 2.0 mm (0.080 in.)
Exhaust: approx. 2.4 mm (0.094 in.)
Valve Seat Angle: 45°
Upper Correction Angle: 30°