S&S Cycle 106-3240 Super Stock 89cc Cylinder Head Kit - .640in. Lift Springs - Winkle Black engine-valve-train-shims S&S Super Stock piston kits

S&S Super Stock piston kits are required and include 10:1 ratio pistons

Sprocket Teeth: 37

2016-2022 Polaris Outlaw 110 EFI

1998 KTM 400 LC4

2008-2015 KTM 250 XC-W

S&S Cycle 106-3240 Super Stock 89cc Cylinder Head Kit - .640in. Lift Springs - Winkle Black engine-valve-train-shims S&S Super Stock piston kitsCompression release machining Must use S&S rocker boxes (PART #90 4110) if S&S compression releases are used. High port flow gives great performance now, and more later when additional upgrades are done. Heads are fully assembled with springs and valves, and are available in silver or black powder coat finish to match OEM components. Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement. Heads are machined