S&S Cycle Evolution Big Twin Flywheels - Harley Evolution
About S&S Cycle
S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.
This S&S Cycle flywheel assembly is engineered for 1984-1999 Harley-Davidson Evolution big twin engines. Machined from heat-treated steel forgings, these flywheels offer enhanced strength over stock components. The assembly comes dynamically balanced for optimal performance with stock 80" cast pistons, ensuring smooth engine operation.
Why riders pick this
- Superior strength from heat-treated steel forgings
- Dynamically balanced for smooth engine operation
- Includes premium S&S mainshafts
- Heavy-duty connecting rods for durability
- Engineered for 1984-1999 Evolution Big Twins
When building or rebuilding an Evolution big twin, the foundation of your engine's rotating assembly is critical. S&S Cycle flywheels provide that robust foundation, crafted from heat-treated steel forgings for exceptional durability. Unlike cast iron or late-style steel flywheels, these S&S units are built to withstand the demands of high-performance V-twin engines, offering peace of mind for riders pushing their Evo hard.
Engineered for Evolution Performance
- CNC machined from heat-treated steel forgings for superior strength
- Significantly stronger than factory or cast iron flywheels
- Dynamically balanced for smooth operation with stock 80" cast pistons
- Includes premium S&S mainshafts and heavy-duty connecting rods
Reliable Power for Your Evo
Whether you're restoring a classic Evolution or building a custom powerhouse, these S&S Cycle flywheels are a crucial upgrade. The inclusion of premium S&S mainshafts and heavy-duty connecting rods means you're getting a complete, high-quality rotating assembly ready for installation. This assembly is designed to drop into your Evolution big twin, providing the reliability and performance S&S is known for.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 32-2239
- Stroke: 4-1/4"
- Diameter: 8-1/2"
- Weight: 36.16 lb
- Category: Drivetrain / Flywheels
Common questions
What Harley-Davidson engines are these flywheels designed for?
These S&S Cycle flywheels are specifically designed for 1984-1999 Harley-Davidson Evolution big twin engines and S&S 80" V80 engines.
Are these flywheels balanced for stock pistons?
Yes, this flywheel assembly is dynamically balanced for stock 80" cast pistons, ensuring optimal performance right out of the box.
What components are included with the flywheel assembly?
The assembly includes the complete flywheel, premium S&S mainshafts, and heavy-duty connecting rods.
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 | S&S Cycle |
| TYPE | Flywheels |
| SKU | T14-662560 |
| WEIGHT | 36.16 lb |
