The Zenoah G240RC engine is a 22.5cc (32mm bore, 28mm stroke) performance machine. This engine is a popular choice among race circuits using displacement limitations. This engine has a smooth RPM band and revs out nicely. In creating this engine, Zenoah revised and improved the legendary G230RC model. These features include:
4-bolt cylinder design for improved sealing and reduced gasket blowout (an enhancement from the 2-bolt cylinder design of the G230RC)
a stronger and lighter crankcase with additional crankshaft bearing
high-performance WT-990 carburetor as standard equipment (15.88mm bore, 12.7mm venture)
A lighter flywheel
metal-impregnated insulator gasket for a better seal and modified cylinder hardware to better resist vibration.
The cylinder showcases a 4 transfer port 32mm cylinder with a "hemi"-style combustion chamber. There are redesigned fins for better cooling and larger ports. A full-circle crankshaft round out the internals. Includes a preinstalled 54mm inner clutch assembly and installation instructions.