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

Upgrade your Harley Davidson Big Twin engine with the S&S Cycle Part Number SSC320-0355 4-3/8 inch stroke flywheel assembly, designed specifically for models from 2000 to 2006. This precision-crafted assembly increases the engine's stroke from 4 inches to 4-3/8 inches, enhancing performance and power output. Constructed from heat-treated, closed die steel forgings, these CNC-machined flywheels are 114 percent stronger than late-style stock steel flywheels, providing durability and reliability under demanding riding conditions. Fully assembled with premium S&S heavy-duty 7.667-inch connecting rods featuring full-width wrist pin ends, the assembly ensures smooth operation and balanced performance. The design maintains less than .0005 inch runout on pinion and sprocket shaft bearing surfaces, making it capable of higher RPMs and fully compatible with gear drive cams. The assembly includes a forged pinion and sprocket shaft, with the sprocket shaft driving the balancer chain, and is intended for engines with Timken sprocket shaft bearings. The three-piece construction ensures ease of installation and maintenance, with the only joints being where the 1.671-inch diameter connecting rod crankpin is pressed into the flywheels. Compatible with a wide range of Harley Davidson models including Softail and Heritage Softail series, this flywheel assembly is an essential upgrade for performance enthusiasts seeking increased power and durability from their engine. Note that the sprocket shaft does not have a stock-style bearing race pressed on, and the assembly is not CARB approved, making it suitable for off-road or race applications. Enhance your Harley’s performance with this high-quality, precision-engineered flywheel assembly from S&S Cycle.

Features:

• Increases engine stroke from 4" to 4-3/8" for enhanced power

• Constructed from heat-treated, CNC-machined steel forgings for superior strength

• Fully assembled with durable S&S heavy-duty 7.667" connecting rods

• Designed with less than .0005" runout for high RPM compatibility

• Includes forged pinion and sprocket shafts, with sprocket to drive balancer chain

• Three-piece design for straightforward installation and maintenance

• Compatible with engines fitted with Timken sprocket shaft bearings

• Suitable for Harley Davidson models from 2000 to 2006

Fitment:
Harley Davidson FLST Heritage Softail Base 2006
Harley Davidson FLSTC Heritage Softail Classic Base 2000
Harley Davidson FLSTC Heritage Softail Classic Base 2001
Harley Davidson FLSTC Heritage Softail Classic Base 2002
Harley Davidson FLSTC Heritage Softail Classic Base 2003
Harley Davidson FLSTC Heritage Softail Classic Base 2004
Harley Davidson FLSTC Heritage Softail Classic Base 2006
Harley Davidson FLSTF Fat Boy Base 2000
Harley Davidson FLSTF Fat Boy Base 2001
Harley Davidson FLSTF Fat Boy Base 2002
Harley Davidson FLSTF Fat Boy Base 2003
Harley Davidson FLSTF Fat Boy Base 2004
Harley Davidson FLSTF Fat Boy Base 2006
Harley Davidson FLSTN Softail Deluxe Base 2006
Harley Davidson FLSTS Heritage Springer Base 2000
Harley Davidson FLSTS Heritage Springer Base 2001
Harley Davidson FLSTS Heritage Springer Base 2002
Harley Davidson FLSTS Heritage Springer Base 2003
Harley Davidson FXST Softail Standard Base 2000
Harley Davidson FXST Softail Standard Base 2001
Harley Davidson FXST Softail Standard Base 2002
Harley Davidson FXST Softail Standard Base 2003
Harley Davidson FXST Softail Standard Base 2004
Harley Davidson FXST Softail Standard Base 2006
Harley Davidson FXSTB Night Train Base 2000
Harley Davidson FXSTB Night Train Base 2001
Harley Davidson FXSTB Night Train Base 2002
Harley Davidson FXSTB Night Train Base 2003
Harley Davidson FXSTB Night Train Base 2004
Harley Davidson FXSTB Night Train Base 2006
Harley Davidson FXSTBI Night Train Base 2001
Harley Davidson FXSTBI Night Train Base 2002
Harley Davidson FXSTBI Night Train Base 2003
Harley Davidson FXSTBI Night Train Base 2004
Harley Davidson FXSTBI Night Train Base 2006
Harley Davidson FXSTD Softail Deuce Base 2000
Harley Davidson FXSTD Softail Deuce Base 2001
Harley Davidson FXSTD Softail Deuce Base 2002
Harley Davidson FXSTD Softail Deuce Base 2003
Harley Davidson FXSTD Softail Deuce Base 2004
Harley Davidson FXSTD Softail Deuce Base 2006
Harley Davidson FXSTS Springer Softail Base 2000
Harley Davidson FXSTS Springer Softail Base 2001
Harley Davidson FXSTS Springer Softail Base 2002
Harley Davidson FXSTS Springer Softail Base 2003
Harley Davidson FXSTS Springer Softail Base 2004
Harley Davidson FXSTS Springer Softail Base 2006