Description
Upgrade your Yamaha Banshee with the 421 Cub Serval Big Bore Rebuild Kit. Engineered to significantly boost performance, this 4mm stroker top-end rebuild kit provides substantial gains in horsepower and torque, making it ideal for aggressive dune riding, track racing, and rugged off-road trails.
Constructed from high-quality, heat-resistant alloy, this cylinder rebuild kit is engineered for maximum durability and resilience in extreme operating temperatures. Designed for straightforward fitment with minimal modifications, it provides a reliable, high-performance engine enhancement for serious ATV enthusiasts.
| Brand | Banshee |
| Product Type | Engine Rebuild Kit |
| Compatibility | Yamaha Banshee |
| Cylinder Displacement | 421cc |
| Material | Heat-resistant alloy |
| Color | Natural metal finish |






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