Race Ported Zenoah 25.4cc 4 Bolt G270RC Top End With Decked Cylinder

This is a brand new race ported 25.4cc G270RC 4 bolt top end. This kit comes with a hand ported G270RC cylinder, piston, ring, wrist pin, c-clips, spark plug, and base gasket. The following port work has been done:

1. Deck cylinder for higher compression with out using a thinner base gasket

2. Resurface all ports for better gas/air mixture

3. Modify transfer ports for better flow

4. Raise/enlarge/reshape exahsut port

5. Rebevel all porting and factory bevels to prevent damage to the piston