- Specs: Top End Piston Kit, One part number includes everything for a top end rebuild. Includes Vertex piston, rings, wrist, pin, circlips, and top end gasket kit. Exact fit A, B, or C pistons match your cylinder bore perfectly to maximize power and performance. 2-stroke applications include wrist pin bearing. 4-stroke applications include Hot Cams cam chain for a more complete rebuild.
**Verify the part fits before purchasing** Specs: Description: Top End Piston Kit Compression Ratio: STD Cylinder Bore: 72. 000 Piston Diam: 71. 950 Displacement: 300. 00 Notes: Top end piston kit includes: piston, rings, pins, circlips, top end gaskets, and wrist pin bearing when applicable. Fits: KTM 300 EXC 2004
