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

NOTE: Specifications are for intake and exhaust unless noted.

Compression Pressure @ Height
667.0 N (150 lbs.) 28.02 mm (1.1031 inch)
289.1 N (65 lbs.) 40.0 mm (1.5748 inch)

Service Limit
Pressure Loss @ Specified Height
10% 28.02 mm (1.1031 inch)