S&S Cycle - S&S Performance Parts 2025 L - Volume 67

2017-UP

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Introducing the next generation of Proven Performance for your 2017 & newer H-D® Touring Models, the MK136 Engine This is the newest version of the complete crate engines S&S is known for, ready to install in your M8 Touring bike We took our MK-Series Crankcases, married them to the 136” cylinders and flywheels, and then fit High-flow cylinder heads with +1mm Valves and 605” springs This is everything you need to have the largest, most powerful, and most reliable crate engine on the market today

1 2017-UP 2 -2007-'17 3 -1999-'06 4 -1984-'99 5 -1936-'84 6 -XL-RA1250 7 -BELTS & GASKETS 8 -TOOLS 9 -WARRANTY 10 -APPENDIX

Fitment: 2017-'24 M8 Touring Excluding 2023-up CVO and 2024 Road Glide and Street Glide models.

Features And Benefits:

Cylinder Heads • High-flow cylinder heads with premium seats, guides, valves, springs, and seals • +1mm oversized intake and exhaust valves • Valves are 030” longer than stock for improved valvetrain geometry • 605” max lift valve springs • High-strength alloy used in cylinder head casting, improved strength at high temperatures • Enlarged cooling passage around the exhaust seats • S&S Exclusive breather boxes MK136 • Forged pistons • S&S performance oil pump and cam support plate • Premium tappets and tappet cuffs • Billet aluminum covers • Sprocket shaft spacer included • Champion spark plugs • Retains stock engine height • Includes Cam Cover Badge • Powder coat finish matches factory finish • Huge displacement increase means a huge power increase

Crankcase • All premium quality components • Patented Dual-Spray Piston Cooling Jets • Precision machined oil scraper • Enlarged oil sump • Contoured floor allows oil to easily drain back to the sump

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