The brand-new 2005 Zenoah G230RC engine is a 22.5cc (32mm bore, 28mm stroke) performance machine. The engine features a stronger intake manifold for better thermal isolation, a red silicone spark plug cap, new blue gaskets, wider intake and exhaust ports, a lighter 32mm piston and thinner ring for reduced reciprocating mass, and improved transfer port matching between cases and cylinder. This engine offers serious performance. It features a 4 transfer port 32mm cylinder, Walbro WT-603 carburetor (15.88mm bore, 12.7mm venturi, independent high and low jets) in your choice of linkage configuration, lighter flywheel, re-designed "hemi"-style combustion chamber, and full-circle crankshaft. Includes installation instructions. Engine is available in complete form, or you can choose purchase the engine without the carb assembly, airfilter, or muffler if you already have these parts and don't need them.