S&S Cycle 310-1289 MK136 Black Edition Engine - Race Only - M8 Touring

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