Product Description
S&S Flywheel Assemblies for Harley Davidson Milwaukee Eight Engines
The flywheel assembly is the heart of any performance engine and S&S has been perfecting the art for over six decades. Stronger, more durable, and trued to a spec others can only dream of, these flywheel assemblies for the Milwaukee Eight are the best of the best to build your high performance engine around.
Made out of heat treaded 4140 material, harder and more than twice as strong as stock. The stronger assembly eliminates the need to weld the crankpin. The High Strength connecting rods are designed with Finite Element Analysis to eliminate weak spots and handle more power. Consistent balance and precision machining makes them capable of higher RPM and perfect for gear drive cams.
Crankshafts that have connecting rods with tapered piston wrist pin ends can be used with stock or S&S pistons. The full-width version can only be used with S&S pistons and S&S Big Bore cylinder kits. Crankshafts with 4 5/8" stroke can only be used with pistons that are designed for this stroke.
Installation instructions S&S Flywheel Assembly M8
4 5/8" stroke gives:
- 113" from a 107" engine with stock 3 15/16" bore
- 117" from a 114" engine with stock 4 1/64" bore
- 121" from a 117" engine with stock 4 5/64" bore
- 131" with an S&S 4 1/4" Big Bore kit
Features:
- Complete flywheel assembly
- Consistent balance and precision machining
- Heat-treated 4140 material is harder and 114% stronger than stock
- Available with either full-width or tapered wristpin connecting rods
- Choose from 4 3/8”, 4 1/2” or 4 5/8” stroke, with or without balancer gear
- Includes flywheel, crankpin and connecting rods
- Special keyed 6° large diameter tapered sprocket shaft that provides more contact area for increased strength
- No welding required
- Pictures for illustration purposes only, actual product may differ
- Made in the U.S.A
Variant: M8 107" (4-3/8" stock stroke) (With balancer gear and tapered piston wrist pin ends)
SKU: C852-788972
OEM: 24100045A
DPN: 788972
Variant: M8 107" (4-3/8" stock stroke) (With balancer gear and full width piston wrist pin ends)
SKU: C852-788975
DPN: 788975
Variant: M8 114/117" (4-1/2" stock stroke) (With balancer gear and tapered piston wrist pin ends)
SKU: C852-788973
OEM: 24100057A
DPN: 788973
Variant: M8 114/117" (4-1/2" stock stroke) (With balancer gear and full width piston wrist pin ends)
SKU: C852-788976
DPN: 788976
Variant: M8 131" / Custom (4-5/8" stroke) (With balancer gear and tapered piston wrist pin ends)
SKU: C852-788974
DPN: 788974
Variant: M8 131" / Custom (4-5/8" stroke) (With balancer gear and full width piston wrist pin ends)
SKU: C852-788977
DPN: 788977
Variant: M8 131" / Custom (4-5/8" stroke) (Without balancer gear and full width piston wrist pin ends)
SKU: C852-788983
Shipping and Delivery Times
All orders are shipped from our warehouse in Falkenberg, Sweden. We work hard to get them moving quickly!
Stock status explained:
- In stock: Ready to ship to you within the time listed. Packages usually arrive 2–4 business days after dispatch depending on your location.
- Sold Out: Currently out of stock at Customhoj, but we expect to have it back soon! Please feel free to contact us for information on when the product will be available again.
If a product has multiple variants (like sizes or colors), the stock status updates automatically as you select your option.
Our goal is simple, to get your order to you as fast as possible!
30-Day Hassle-Free Returns - No Questions Asked
If you are not entirely satisfied with your order, whether you need to change sizes or something else, we offer a full 30-day return policy from the day you receive your order. Return shipping costs apply.
Please note that the right to return does not apply to products that are personalized, or manufactured upon order. See our return policy for complete details and conditions.
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