S&S CYCLE 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8 310-1225
Part Number: 09040101Description
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
Fitment
Fitment for S&S CYCLE 129" Power Package Engine Performance Kit - Chain Drive - Oil Cooled - Highlighted Fins - M8 310-1225
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