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

DIMENSIONS
Combustion Chamber Volume 46.34-48.34 cc
Cylinder Bore Diameter 100.38-100.43 mm (3.9527-3.9543 inch)
Maximum Cylinder Out-of-Round 0.025 mm (0.0009 inch)
Maximum Cylinder Taper 0.025 mm (0.0009 inch)
Main Bearing Bore Diameter 60.62-60.64 mm (2.3866-2.3874 inch)
Crankshaft to Rear Face of
Block Runout TIR 0.127 mm (0.005 inch) Max.
Head Gasket Surface Flatness (1)
Head Gasket Surface Finish 60-150 RMS

(1) 0.079 mm (0.003 inch) in any 6 inches-0.16 mm (0.06 inch) overall.