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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Valve Specifications

Face Angle 45°
Seat Angle 45°
Minimum Margin 0.635 mm (0.025")
Seat Run Out Max 0.050 mm (0.002")
Seat Width
Intake 1.53 mm-2.03 mm (0.060"-0.080")
Exhaust 2.29 mm-2.79 mm (0.090"-0.110")
Stem Height All 49.15 mm-50.17 mm (1.935"-1.975")
Stem Clearance
Exhaust 0.038 mm-0.081 mm (0.0015"-0.0032")
Intake 0.038 mm-0.089 mm (0.0015-0.0035")