S&S CYCLE Big Bore Kit 920-0144
Part Number: 09040085
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Description
If you're serious about closed-course competition, displacement is power. The S&S Cycle Big Bore Kit delivers measurable horsepower and torque gains by increasing your engine's swept volume and compression ratio, giving you the edge needed to stay competitive on the track. Choose your displacement—750cc or 865cc—and bolt in the confidence that comes from factory-engineered components built to withstand race conditions.
- Complete kit with cylinders, pistons, gaskets
- 750cc option: 83.5mm bore × 67.8mm stroke
- 865cc option: 90mm bore × 67.8mm stroke
- Compression ratio: 11.0:1
- Stock compression: 9.5:1
- Bore increase over stock: 5.5mm–12mm
- CNC-machined cylinder sleeves
- Forged piston assemblies
- USA manufactured
- Closed-course competition only
- California legal for sanctioned racing vehicles
- Not street legal
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