fits model: Fxrs, Sp. make: Harley, Davidson. year: 1986–1993.

( Brand: S-s Cycle ), ( Manufacturer Part Number: MN/YN5S ), ( Type: High Compression Piston Kit ), ( Compatible Year: 1993 1992 1991 1990 1989 1988 1987 1986 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fxrs-sp Low Rider Sport ), ( Bundle Description: 1 Pc Genuines S Cycle High Compression Piston Kit ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )
The Cycle MN YN5SS High Compression Piston Kit is a top-tier upgrade for your 1986-1993 Harley-Davidson FXRS-SP/TB models. This piston kit is designed to enhance your engine's performance, providing a noticeable increase in horsepower and torque.
The YN5SS piston kit is renowned for its high-compression design. With a compression ratio of 11.5:1, it allows for a more efficient combustion process, resulting in a more powerful and responsive engine. The pistons are made from forged aluminum, ensuring durability and reliability, even under the most demanding riding conditions.
The piston kit also includes wrist pins, rings, and clips, ensuring a complete and easy installation process. The wrist pins are made from chrome molybdenum steel, providing excellent strength and durability. The rings are designed to minimize oil consumption and promote proper sealing, ensuring optimal engine performance and longevity.
The pistons are precision-machined to ensure a perfect fit with your Harley-Davidson engine. They are also coated with a molybdenum disulfide (Moly) coating, which reduces friction and wear, further improving engine performance and longevity.
The Cycle MN YN5SS High Compression Piston Kit is not just an upgrade for power-hungry riders, but also for those who value reliability and durability. It is a high-quality, American-made part, designed to provide years of trouble-free service.
In conclusion, the Cycle MN YN5SS High Compression Piston Kit is a must-have upgrade for any Harley-Davidson FXRS-SP/TB owner seeking improved engine performance, reliability, and durability. This kit is more than just a piston upgrade; it's an investment in your riding experience.
Pros of buying a high compression piston kit for your 1986-1993 Harley-Davidson FXRS-SP/TB YN5S:1. Increased power: High compression pistons allow for a more efficient combustion process, which can result in more horsepower and torque from your engine.
2. Improved fuel efficiency: By increasing the efficiency of the combustion process, high compression pistons can help improve fuel economy.
3. Better engine performance: High compression pistons can improve throttle response, acceleration, and overall engine performance.
Cons of buying a high compression piston kit for your 1986-1993 Harley-Davidson FXRS-SP/TB YN5S:1. Requires engine tuning: To safely use high compression pistons, your engine will need to be properly tuned to ensure that it can handle the increased compression ratio. This may require additional modifications to your engine, such as upgraded cams, intake, and exhaust systems.
2. Higher cost: High compression piston kits can be more expensive than standard piston kits, and the additional modifications required to use them can add to the overall cost.
3. Potential engine damage: If not properly tuned or installed, high compression pistons can cause engine damage, such as detonation or knocking.
Conclusion:A high compression piston kit can provide significant performance benefits for your 1986-1993 Harley-Davidson FXRS-SP/TB YN5S, but it's important to consider the potential drawbacks and ensure that your engine is properly tuned before making the purchase. If you're willing to invest the time and money required for proper tuning and modifications, a high compression piston kit can be a worthwhile investment for improving your bike's performance.
Recommendation:If you're considering purchasing a high compression piston kit for your 1986-1993 Harley-Davidson FXRS-SP/TB YN5S, we recommend doing thorough research and consulting with a qualified mechanic to ensure that your engine is capable of handling the increased compression ratio. Be prepared to invest time and money in proper tuning and modifications, and be aware of the potential risks of using high compression pistons if they're not properly installed or maintained.
Cycle High Compression Piston Kit for 1986 - 1993 Harley Davidson FXRS-SP tb: Status: In Stock.