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S&S CYCLE 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8 310-1225

Part Number: 09040101
S&S CYCLE
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SKU:
09040101
MPN:
310-1225
Availability:
Ships Same Business Day
Weight:
43.70 LBS
On Sale
  • S&S CYCLE 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8 310-1225
  • S&S CYCLE 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8 310-1225
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MSRP: $3,359.95
Now: $3,023.96
Was: $3,359.95
— You save $335.99
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Description

If you're running a 107" M8 oil-cooled engine and want measurable power gains without extensive machine work, this 129" kit delivers the displacement and efficiency upgrades you need. The matched component design—big-bore cylinders, optimized cam, and purpose-built oil pump—ensures reliable power delivery across the RPM range. You'll gain meaningful horsepower and torque while preserving your engine's serial number integrity and serviceability.

  • Transforms 107" displacement
  • Increases to 129" displacement
  • M8 oil-cooled compatible
  • Chain drive application
  • No case machining required
  • Big-bore cylinders included
  • Matched performance cam
  • Purpose-designed oil pump
  • Independent scavenge sections
  • Flywheel cavity scavenging
  • Cam chest scavenging
  • Debris-prevention magnet installed
  • Conical single-wire valve springs
  • S&S proprietary spring design
  • Bolt-on installation (professional recommended)
  • Retains original serial numbers
  • Removable passage plugs
  • USA manufactured
  • MPN: 310-1225
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