- Big Bore Kit
- Brand
- 50 Caliber Racing (53)
- Advantage Parts (28)
- Alpha Rider (36)
- Athena (129)
- Athena Az Quad Parts (28)
- Bbr Motorsports (78)
- Cylinder Works (105)
- Honda (46)
- Hyway (29)
- Niche (59)
- Polaris (26)
- Power Part Pros (57)
- S & S Cycle (146)
- Smm (27)
- Tb Parts (165)
- Tbparts (64)
- V-twin (37)
- Vertex (47)
- Wiseco (89)
- Yamaha (58)
- Other (2494)
- Compatible Make
- Item Diameter
- Machine Type
- Model
- Type
- Big Bore (42)
- Big Bore Kit (140)
- Big Bore Top End Kit (6)
- Block Cylinder (6)
- Complete Cylinder (27)
- Cylinder (21)
- Cylinder Barrel (54)
- Cylinder Block (7)
- Cylinder Head (5)
- Cylinder Kit (72)
- Cylinder Piston Kit (6)
- Cylinder Rebuild Kit (6)
- Engine (5)
- Engine Kit (5)
- Engine Rebuild Kit (159)
- For Linhai Lh300 (5)
- Piston (12)
- Piston Kit (98)
- Top End Kit (9)
- Top End Rebuild Kit (40)
- Other (3076)
Polini Contessa 72cc 2T Big Bore Kit For Zuma 50cc Vertical (Pre 2001)
Polini Contessa 72cc 2T Big Bore Kit For Zuma 50cc Vertical (Pre 2001). Polini has become the leader in Italian racing cylinder kits. Their entry level Contessa options are relitively easy to install, tune. And improve the performance of your scooter. This 72cc kit for the 2T Yamaha Zuma Vertical Engine is the ideal starter big bore kit. For someone looking to get significant gain without excess tuning time. Don't forget to properly break in your big bore kit and add about an ounce of 2 stroke oil. 50cc oil injectors are not meant to lubricate 72cc bores. For break in, we recommend 200-300 mile before running your bike. Full throttle for any extensive length of time. This kit will only fit Pre-2001 Zuma and BWS 50 models. This product is intended for off-road use only.