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 Spring

Spring Length W/Damper Removed, Compression Pressure (Lb. @ Spec. Length)
Intake and Exhaust (Installed) 71-79 @ 1.52 inch
Intake and Exhaust (Valve Open) 128-142 @ 1.12 inch
Intake and Exhaust (Valve Closed) 67-74 @ 1.52 inch
Free Length (Approximate) 1.877 inch
Assembled Height 1.49-1.55 inch
Service Limit 5% Pressure Loss @ Specified Length
Out of Square Service Limit 5/64 (0.078)