# S&S Cycle 00-06 BT 4-3/8in Stroke Flywheel Assembly w/o Sprocket Shaft Bearing Race

This 4-3/8" stroke 8-1/2" diameter flywheel assembly replaces the original flywheels in 2003-'06 HD® internally balanced big twin engines, increasing the stroke from 4" to 4-3/8". Sprocket shaft does not have a stock style bearing race pressed on.

-   Assembly is trued to less than .0005" runout on pinion and sprocket shaft bearing surfaces, making them capable of higher rpm and fully compatible with gear drive cams
-   Flywheels are CNC machined from heat-treated, closed die, steel forgings, which are 114 percent stronger than late style stock steel flywheels
-   Fully assembled with premium quaility S&S® heavy duty 7.667" connecting rods, with full width wrist pin ends, and dynamically balanced
-   The only joints in the assembly are where the 1.671" diameter connecting rod crankpin is pressed into the flywheels
-   This flywheel assembly is for crankcases with Timken® sprocket shaft bearing
-   Pinion and sprocket shafts are forged as part of the flywheel
-   Pinion shaft has sprocket to drive balancer chain
-   Flywheel assembly is three piece design

This Part Fits:

Year

Make

Model

Submodel

2006

Harley-Davidson

FLST Heritage Softail

Base

2000-2004,2006

Harley-Davidson

FLSTC Heritage Softail Classic

Base

2000-2004,2006

Harley-Davidson

FLSTF Fat Boy

Base

2006

Harley-Davidson

FLSTN Softail Deluxe

Base

2000-2003

Harley-Davidson

FLSTS Heritage Springer

Base

2000-2004,2006

Harley-Davidson

FXST Softail Standard

Base

2000-2004,2006

Harley-Davidson

FXSTB Night Train

Base

2001-2004,2006

Harley-Davidson

FXSTBI Night Train

Base

2000-2004,2006

Harley-Davidson

FXSTD Softail Deuce

Base

2000-2004,2006

Harley-Davidson

FXSTS Springer Softail

Base

## Details

- **Price:** 2502.46 CAD
- **Vendor:** S&S Cycle
- **Type:** Flywheels

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2502.46 CAD | In stock |

## Images

- User 1

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/s-s-cycle-00-06-bt-4-3-8in-stroke-flywheel-assembly-w-o-sprocket-shaft-bearing-race)
> Updated: 2026-07-01