Operation CHARM: Car repair manuals for everyone.
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

System Specifications

Cylinder Head/Valve Train
Combustion Chamber Volume 52.6 - 51.6 cc
Valve Seat Width - Intake 2.1 - 1.9 mm
Valve Seat Width - Exhaust 2.1 - 1.9 mm
Valve Seat Angle 45.00 - 44.50 degrees
Valve Seat Runout (T.I.R.) 0.025 mm

For torque specifications, refer to the service procedure.