Description
Bolt-In Sidewinder 4\” Big Bore Kits
- Bolt in – no machining, balancing or splitting the crankcases; install can be performed with engine still in frame
- Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer
- 88\” engines are boosted to 100\”
- 96\” and 103\” engines are boosted 110\”
- 10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams
- Complete kits include cylinders, forged pistons, rings, piston pins, clips and gaskets
- Not for use with S&S 79cc heads
- Not recommended for trike models

![S&S Cycle Cylinder Kit – 110 ” – Silver [MPN: 910-0650]](https://www.carpartspact.com/wp-content/uploads/2026/03/s-038-s-cycle-cylinder-kit-8211-110-8221-8211-silver-mpn-910-0650-zwckdxdc87970.webp)
![ProX Piston Kit [MPN: 01.1408.100]](https://www.carpartspact.com/wp-content/uploads/2026/03/prox-piston-kit-mpn-01-1408-100-ykmjuwup65976.webp)
![WSM Piston Ring for Polaris – .25mm [MPN: 010-933-04]](https://www.carpartspact.com/wp-content/uploads/2026/03/wsm-piston-ring-for-polaris-8211-25mm-mpn-010-933-04-uptrkvgl47570.webp)

![Hot Cams Valve Shims 7.48×1.70mm – 5/Pack [MPN: 5PK748170]](https://www.carpartspact.com/wp-content/uploads/2026/03/hot-cams-valve-shims-7-48-215-1-70mm-8211-5-pack-mpn-5pk748170-cxlcrbzw53822.webp)
Reviews
There are no reviews yet.