6311 - Full Mod G320RC Top End (Replacement for engine 6300)

Porting not shown in picture!

Full mod G320RC top end. Can be installed onto a stock G320RC engine or is a replacement top end for full mod engine 6300. View engine description for modifications done to top end. https://oneillbrothers.com/products/6300-7-7hp-full-mod-zenoah-g320rc-31-8cc-engine?_pos=1&_sid=6be5a34a3&_ss=r

Top end comes complete with:

Ported cylinder

Modified piston

piston ring

Cylinder gasket

Transfer port/skavenging covers

Wrist pin

Thrust/piston pin washer

c-clip set