36mm Big Bore Kit for 28.5cc / 30.5cc

36mm Big Bore Kit for 28.5cc and 30.5cc engines.

Fits: G230RC, G260RC, CY23, CY26, CY27, GP290, Fuelie 23cc, Fuelie 26cc.

Notice *If this kit is being installed on a stroker motor that has a +1mm or +2mm crankshaft, you'll need a .020" or .040" copper gasket to be stacked with paper gasket for proper squish clearance at the top of the cylinder.  Failure to stack gaskets will result in engine damage.