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3 Piece Flywheel Assemblies for 2007-Up Twin Cam 96®/103™ and 96B™/103™

Dealer Only Item

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  • 2007-'14 Harley-Davidson® big twins – Balanced and unbalanced models
  • S&S T-Series Engine and Hot Set Up Kit® replacement flywheels

Features and Benefits:

  • Heat-treated 4140 material is harder and 114% stronger than stock
  • New light weight connecting rod forgings
  • Available with full width wristpin connecting rods • Larger 1.671" diameter crankpin - increased contact area and tighter press fit fora stronger joint.
  • No welding required!
  • Integral mainshafts - eliminates two potential points of weakness
  • Consistent balance and precision machining – Truer flywheels and less vibration
  • Reduced mainshaft deflection at high rpm – less vibration, reduced piston and rod side thrusting, prevents oil pump damage, fully compatible with gear drive cams
  • Capable of higher rpm – More available power!



S&S® Flywheel Assemblies for 2007-'14 H-D® big twin models
Engine Displacement Stroke Rod WP End Style Sprocket
 Bearing Race
Twin Cam 96®/103™  Twin Cam 96B™/103B™
 96, 103, 106 big bore, 110, 117 w/S&S Pistons 4 3/8" Straight Yes** 320-0350 320-0356
No 320-0351 320-0357
 96, 103, 110 w/Stock Pistons* 4 3/8" Tapered* Yes** 320-0352 320-0358
No 320-0353 320-0359
 S&S 106 Stroker 4 1/2" Straight No 320-0450 320-0456
 S&S 111 4 1/8" Straight No 320-0407 320-0413
 SE 120R (uses 7.575" length rods) 4 5/8" Straight No 320-0523 320-0529
 S&S 124 4 5/8" Straight No 320-0464 320-0471
 Special Order Specify Specify Specify 329-0002
*Stock pistons in 2007 and later engines require rods with tapered wristpin ends. Note - All S&S Flywheels for 2007 and later engines have 7.659” length connecting rods. **Note - Flywheel assemblies supplied with sprocket shaft bearing race installed are compatible with stock roller style sprocket shaft bearings. Assemblies with no race require a Timken® sprocket shaft bearing.
Special order forms can be found by clicking here.




  • Strokes longer than stock will require S&S Piston Oiler Set, part #31-2026.
  • 2007-up stock rod length is 7.659".
  • Main Bearing Note: Most S&S flywheel assemblies for 1999-'14 big twin engines are designed for use with Timken® sprocket shaft bearings. They will fit directly in stock
  • 1999-’02 Harley-Davidson® crankcases and in all S&S crankcases for 1999-'14 big twin engines, with no modifications. However, stock 2003 and later engines use a roller
  • type bearing for the sprocket shaft. S&S does offer flywheel assemblies that are compatible with late roller style stock sprocket shaft bearings, but they are not recommended
  • for very large, high performance engines.
  • S&S strongly recommends retrofitting 2003-'14 model crankcases to accept a Timken sprocket shaft bearing. A Timken conversion sleeve such as Screamin' Eagle®
  • #34822-08 or Jim's® #956 may be used. A charging system spacer for 1999-'02 model year is also required.
  • The S&S Service and Speed Center® can perform this modification for you.
  • If you choose not to convert your crankcases to a Timken sprocket shaft bearing, S&S flywheels may be used in 2003 and later engines by either purchasing the stock
  • compatible flywheels or by installing Harley-Davidson® bearing kit #24004-03B when using S&S flywheels designed for Timken bearings. This bearing kit adapts the S&S sprocket shaft so it is compatible with stock roller type bearings. Verify that the bearing kit contains the 24604-00D or 24607-07 sprocket shaft bearing. Do not use a
  • 24604-00, 24604-00A, 24604-00B or 24604-00C bearing. Please be advised that if this type of bearing is used, sprocket shaft bearing failure WILL NOT be covered under warranty.
  • S&S can provide quality, professional machine shop and engine building service through our S&S® Service and Speed Center®. We can handle any job from fitting a set of
    pistons in your cylinders, to complete installation of any engine kit. Contact your S&S customer service representative for details.


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