TB 178cc Bore Kit, Race Head V2, and Intake Manifold Kit - Z125 Body High compression 63mm piston with

High compression 63mm piston with rings

Direct replacement for O

Cable TBW0301 will also work

Fully adjustable

TB 178cc Bore Kit, Race Head V2, and Intake Manifold Kit - Z125 Body High compression 63mm piston withTB 178cc Bore Kit, Race Head V2, and Intake Manifold Kit TB 178cc Big Bore Kit, Race Head V2, and Intake Manifold Kit This is the final step in power gains as far as cylinder size goes. Like the 165cc kits, installation of this kit requires engine dis assembly and case boring. The engine cases cant safely be bored any bigger and for this 67mm cylinder, you definitely will want an experienced shop to bore your cases. You can also add a stroker crank