Product Description
S&S CYCLE MK136 Black Edition Engine – 550G Gear Drive – Oil Cooled – Race Only – M8 Touring
Key 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
Technical Specifications
- Weight: 157.00 lbs
- Supplier Number: 310-1289
- Unit of Measure: Each
Current Warehouse Inventory
Stock by Location:
- ✓ Janesville, WI: 4 units
- ✓ Batavia, NY: 1 units
- ✓ Dallas, TX: 1 units
- ✗ Fresno, CA: 0 units
- ✓ Reno, NV: 1 units
- ✗ Asheville, NC: 0 units
- ✓ National: 7 units
Total Available: 14 units
Inventory Last Checked: December 4, 2025 at 1:00 AM UTC
Thank you for Shopping at Knobtown Cycle!
When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.
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