REVOLUTION PERFORMANCE, LLC - RP201-129W - Cylinder Kit - 131” - Black with Highlighted Fins - Twin Cam
The REVOLUTION PERFORMANCE, LLC RP201-129W is a purpose-built cylinder kit designed and tested to perform correctly in the conditions and applications it was made for. Aerospace-grade all-aluminum cylinder with nickel-silicon-carbide (NSC) electroplated bore. NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan, giving you a level of quality that holds up across the full service life of the component. Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for NSC cylinders and a head/base gasket set. Will require case boring, which is not recommended on OEM cases '95 and earlier; some kits will require a 4.625” stroke crank as noted.. Bore Size: 4.250”. The RP201-129W delivers exactly what riders need from a quality aftermarket component. Sold as a complete kit.
Features
- Aerospace-grade all-aluminum cylinder with nickel-silicon-carbide (NSC) electroplated bore
- NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan
- Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for NSC cylinders and a head/base gasket set
- Made in the USA
- Will require case boring, which is not recommended on OEM cases '95 and earlier; some kits will require a 4.625” stroke crank as noted.
Specs
- Bore Size: 4.250”
- Color/Finish: Black
- Compression Ratio: 10.6:1
- Material: Aluminum
- Product Name: Cylinder Kit
- Stroke Length: 4.625”
- Cylinder Bore Coating: Nickel-Silicon Carbide
- Riding Style: Street
- Type: Monster Big Bore
- Color/Finish: Highlighted Fins
- Units: Kit
- Compression Ratio: 11.2:1
- Displacement: 131”
- Features: Flat Top
Frequently Asked Questions - REVOLUTION PERFORMANCE, LLC - RP201-129W - Cylinder Kit - 131” - Black with Highlighted Fins - Twin Cam
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
