S&S CYCLE MK136 Black Edition Engine - 550G Gear Drive - Oil Cooled - Race Only - M8 Touring 310-1289

The S&S Cycle MK136 Black Edition is purpose-built for M8 Touring platforms where race-level performance demands precision engineering and reliability under extreme conditions. This is not a modified stock engine—it's a ground-up performance assembly designed by one of the most respected manufacturers in the industry. If you're serious about track performance, this engine delivers the geometry, cooling capacity, and durability required for sustained high-RPM operation.

Key Performance Features:

• High-flow cylinder heads, premium internals
• +1.00 mm oversized intake/exhaust valves
• 0.030" extended valve length, improved geometry
• 550G gear drive camshaft
• 0.605" maximum valve lift capability
• Enhanced cooling passages, exhaust seat area
• Dual-spray piston cooling jets
• Precision oil scraper, enlarged sump
• Contoured crankcase floor, efficient drain-back
• Forged pistons, S&S performance oil pump
• Billet aluminum covers, sprocket spacer
• Premium tappets, tappet cuffs included
• Stock engine height, direct fit
• S&S exclusive breather boxes
• Includes Champion spark plugs
• Manufactured in USA
• Race-only application
• MPN: 310-1289

Excludes additional discounts.