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Wednesday 16 September 2020

S&S Cycle

M-8 Forged Roller Rocker Arm Upgrades

S&S Cycle's engineers have addressed a potentially important issue in M-8 engines. Big lift cams can open up the high rpm potential of the M-8 powerplant, but they can also add stress to the stock valvetrain geometry. 

Valve thrust and valvetrain wear in big lift cam applications drove S&S engineers to design stronger, more durable components that will help dealers and riders get the most out of the M-8, and first on the list was forged roller rocker arms.
These new rockers are stronger, more durable, and designed to be easier on the rest of the top end. Oil routing is updated and is now sprayed directly on the valve springs, helping cool and lubricate these hard working parts.
Compatible with stock and most CNC-ported heads, they feature a 1.640 ratio, which is capable of up to .650 valve lift. S&S says that "we think these are an essential modification for increasing the longevity of valvetrain components, particularly with cams running .550 or greater lift. Making big, reliable power has always been what we do best, and these new forged roller rockers are a solid addition to our M-8 performance parts line."