Factory cylinder with new bore to match new piston kit assembly for;
1989-2006 Polaris Big Boss 250
1989-2006 Polaris Trailblazer 250
Bolt on and go kit.
Kit Includes:
- Factory cylinder with a new 74mm bore to new Wiseco top end piston kit
- Piston complete with piston, rings, cir clips and wrist pin
- Complete top end gaskets set
