S&S CYCLE - 310-1289 - MK136 Black Edition Engine - 550G Gear Drive - Oil Cooled - Race Only - M8 Touring
The S&S CYCLE 310-1289 is a mk136 black edition engine - 550g gear drive - oil cooled - race only - m8 touring engineered for street applications where fit, function, and build quality are the baseline expectation. High-flow cylinder heads with premium seats, guides, valves, springs, and seals. +1.00 mm oversized intake and exhaust valves, giving you a level of quality that holds up across the full service life of the component. Valves are 0.030” longer than stock for improved valvetrain geometry. 0.605” max lift valve spring. 550G gear drive cam. The 310-1289 delivers exactly what riders need from a quality aftermarket component. Sold individually.
Features
- Cylinder Heads:
- High-flow cylinder heads with premium seats, guides, valves, springs, and seals
- +1.00 mm oversized intake and exhaust valves
- Valves are 0.030” longer than stock for improved valvetrain geometry
- 0.605” max lift valve spring
- 550G gear drive cam
- Enlarged cooling passage around the exhaust seats
- S&S exclusive breather boxes
- Crankcase:
- Patented dual-spray piston cooling jets
- Precision machined oil scraper
- Enlarged oil sump
- Contoured floor allows oil to easily drain back to the sump
- MK136:
- Retains stock engine height
- Includes forged pistons, S&S performance oil pump and cam support plate, premiun tappets and tappet cuffs, billet aluminum covers, sprocket shaft spacer, Champion spark plugs and cam cover badge
- Made in the USA
Specs
- Product Name: Engine
- Color/Finish: Powder Coat
- Type: Race
- Color/Finish: Black
- Piston Material: Forged
- Model: MK136
- Riding Style: Street
- Units: Each
- Displacement: 136”
- Cooling System: Oil Cooled
Frequently Asked Questions - S&S CYCLE - 310-1289 - MK136 Black Edition Engine - 550G Gear Drive - Oil Cooled - Race Only - M8 Touring
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
