Wiseco EVO 883/1200 9.5:1 Compression Piston Kit - Harley Evolution
About Wiseco
Wiseco has forged pistons in Mentor, Ohio since 1941, supplying everything from factory race teams to big-bore street builds. Forged construction is what lets a V-twin survive higher compression and more cylinder pressure than the stock cast piston was designed for.
Unleash the full potential of your Harley Evolution engine with this Wiseco V-Twin Piston Kit. Engineered for 883 and 1200cc EVO motors, this kit delivers a 9.5:1 compression ratio, perfect for riders seeking a balanced increase in power and reliability. Each piston is crafted to meet the demands of performance street riding.
Why riders pick this
- Boosts compression to 9.5:1 for improved power
- Forged high-silicon aluminum for superior strength
- Compatible with all common cylinder bore types
- Reduces weight and enhances heat transfer
- Precision diamond-turned finish for exact fit
When it's time to refresh or upgrade your Harley Evolution motor, Wiseco piston kits provide the foundation for robust power. These forged pistons are a significant upgrade over cast factory components, offering superior durability and heat management for sustained performance.
Built for Demanding Performance
- Forged from high-silicon, low-expansion aluminum for exceptional strength
- Diamond-turned finish ensures precise dimensions and consistent bore fitment
- Compatible with a wide range of cylinder bores, including cast iron, chrome, nikasil, and boron composite
- Designed to reduce weight and improve heat dissipation for engine longevity
The Foundation of a Strong Build
Installing a quality piston kit is crucial for any engine build, whether you're rebuilding a tired motor or chasing more power. Wiseco pistons are known for their consistency, making them a trusted choice for builders and riders. Consider pairing this kit with a performance cam and a proper dyno tune to fully realize your engine's potential.
Specifications
- Brand: Wiseco
- Manufacturer Part #: K1655
- Engine: Harley EVO 883 / 1200
- Compression Ratio: 9.5:1
- Weight: 2.794 lbs
Common questions
Do these pistons require cylinder boring or honing?
These pistons are designed for various bore types. Always consult a qualified mechanic to determine if your cylinders require boring, honing, or re-sleeving to match the piston specifications.
What kind of performance gain can I expect?
A 9.5:1 compression ratio will increase your engine's efficiency and power output compared to stock, especially when combined with other performance upgrades like a cam and exhaust. Specific gains depend on your overall build.
Are these pistons compatible with different cylinder materials?
Yes, Wiseco pistons are engineered to work with cast iron, chrome, nikasil, and boron composite cylinder bores without modification.
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 | Wiseco |
| TYPE | Piston kits & Components |
| SKU | K1655 |
| WEIGHT | 2.79 lb |
