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S&S Cycle M8 Flywheel Assemblies

Not Yet Reviewed

Crankshafts are the heart of any performance engine. S&S Cycle M8 flywheel assemblies are stronger, more durable, and trued to a spec others can only dream of. Thes
Crankshafts are the heart of any performance engine. S&S Cycle M8 flywheel assemblies are stronger, more durable, and trued to a spec others can only dream of. These cranks for the Milwaukee-Eight platform are the best of the best to build your high performance engine around. Available in different strokes with tapered rods or full wrist pin rods, select the M8 flywheel assembly needed for your motorcycle's engine.

Features and benefits:

* Available in 4 3/8, 4 1/2, and 4 5/8 in. stroke
* Comes with balance gear installed for easier installation
* Heat-treated 4140 material is harder and more than twice as s
Crankshafts are the heart of any performance engine. S&S Cycle M8 flywheel assemblies are stronger, more durable, and trued to a spec others can only dream of. These cranks for the Milwaukee-Eight platform are the best of the best to build your high performance engine around. Available in different strokes with tapered rods or full wrist pin rods, select the M8 flywheel assembly needed for your motorcycle's engine.

Features and benefits:

* Available in 4 3/8, 4 1/2, and 4 5/8 in. stroke
* Comes with balance gear installed for easier installation
* Heat-treated 4140 material is harder and more than twice as strong as stock
* Stronger assembly eliminates need to weld crankpin
* S&S high-strength forged connecting rods are designed with Finite Element Analysis to eliminate weak spots and handle more power
* Full width connecting rods have more material to handle higher stress
* Perfect for gear drive camshafts
* Consistent balance and precision machining
* Capable of higher rpm--more available power


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Results 1 - 5 of 5

CRANKSHAFT, M8 FLYWHEEL 4-3/8" TAPERED

Part Number: SSY-320-0601

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

CRANKSHAFT, M8 FLYWHEEL 4-1/2" TAPERED

Part Number: SSY-320-0598

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

CRANKSHAFT, M8 FLYWHEEL 4-3/8" FULL

Part Number: SSY-320-0604

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

CRANKSHAFT, M8 FLYWHEEL 4-5/8" FULL

Part Number: SSY-320-0605

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

CRANKSHAFT, M8 FLYWHEEL 4-1/2" FULL

Part Number: SSY-320-0603

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

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Estimated Ship Date: Jan 5, 2026 if ordered today

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