Zenoah G320RC 4-Bolt Top End Kit 38mm 31.8cc 967319401 (OBR Modified for +2mm Stroker Crankshaft)

Zenoah G320RC 4-Bolt Top End Kit 38mm 31.8cc 967319401 - (Modified for +2mm Stroker Crankshaft)

Modified by OBR to accept the +2mm (30mm) stroker crankshaft. OBR has machined the squish on the cylinder to properly accommodate the +2mm stroke, while still using a stock thickness cylinder base gasket.

Fits Zenoah G320RC engine (with +2mm stroker crankshaft installed - part dd404b - only. Does NOT fit earlier Zenoah RC models!

This will make your engine a 34.02cc.

Requires the +2mm stroker crankshaft (DDM part number dd404b).

Zenoah Part # 967319401, Modified by OBR to accept +2mm stroke

Manufacturer notes:

Squish band is cut to accept a +2mm stroker crank without stacking gaskets. The stock cylinder gasket needs to be used. Running a thinner gasket or no gasket at all will raise compression too high and/or cause the piston to hit the combustion chamber
Hemispherical dome is cut to improve power
Compression set for 91-95 octane fuel. Running race fuel can cause detonation and damage to the top end.