Harddrive M8 124 Black with Machined Fins Cylinders Pair - Harley Milwaukee-Eight
About Harddrive
Harddrive is the house performance and replacement line built for American V-twins, covering everything from engine hardware and electrical to controls, lighting and chassis parts. The range is aimed squarely at Harley-Davidson and Indian riders who want a direct-fit part without dealer pricing, and it spans decades of model years — from Evolution-era Softails to current Milwaukee-Eight baggers.
Unleash more displacement from your Milwaukee-Eight with Harddrive M8 124 big-bore cylinders. This pair of black powder-coated cylinders with machined fins delivers an OEM-style appearance while preparing your engine for a significant power boost. Designed for a straightforward installation, they are a direct fit for Wiseco K2787 pistons.
Why riders pick this
- Boost your Milwaukee-Eight displacement with big-bore cylinders
- Factory-style black powder coat with machined cooling fins
- Engineered for Wiseco K2787 pistons
- Compatible with Cometic Head and Base gasket kits
- No machine work required for installation
These Harddrive M8 cylinders are engineered for riders looking to maximize their V-twin's potential. Crafted for durability and performance, they provide the foundation for a potent big-bore build. The meticulous finish with machined fins ensures your engine bay maintains a factory-fresh look even with increased displacement.
Engineered for Performance Builds
- Powder-coated black finish with precision-machined cooling fins
- Big-bore cylinders designed for Milwaukee-Eight engines
- Compatible with Wiseco K2787 pistons for a high-performance build
- Works seamlessly with Cometic Head and Base gasket kits without modification
- No additional machine work required for installation
Ready for Your M8 Upgrade
Whether you're replacing worn cylinders or embarking on a full big-bore conversion, these Harddrive M8 cylinders simplify the process. They are designed to integrate with common aftermarket components, making your engine upgrade smoother. Pair them with a high-performance cam and a proper dyno tune to fully realize your Milwaukee-Eight's potential.
Specifications
- Brand: Harddrive
- Manufacturer Part #: 88186
- UPC: 191361123412
- Length: 21.2 in
- Width: 11.02 in
- Height: 11.02 in
- Weight: 11.02 lbs
- Country of Origin: Japan
Common questions
What pistons are these cylinders designed for?
These M8 big-bore cylinders are specifically designed to work with Wiseco K2787 pistons, which are sold separately. Please confirm your piston part number before purchasing.
Do I need to purchase new gaskets with these cylinders?
Yes, gaskets are sold separately. These cylinders are compatible with Cometic Head and Base gasket kits without requiring any modifications.
Are these cylinders sold individually or as a pair?
These Harddrive M8 cylinders are sold as a pair, providing both cylinders needed for your Milwaukee-Eight engine.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Harddrive |
| TYPE | Engine |
| SKU | 820-51548 |
| WEIGHT | 11.02 lb |
