88-06 XL Sportster

415" valve lift and have a moderate 129 lbs seat pressure

Since head pipes are therefore not connected you get the clean and uncluttered look

FLTR models)

36-47 Knuckle and 38-47 WL

JIMS, COMPRESSION RELEASE VALVE SET G" 88-06 XL Sportster10x1. 0mm threaded mechanical compression release valves, for most cylinder heads. Push in the button and pressure will vent out of the valve. When the engine starts, the valves automatically close. Designedl for hard starting high compression motors. Note: MCS 978425 thread tap tool (10x1. 0mm) and 978424 drill fixture tool are separately available to aid installation in Twin Cams. Fits: > All B. T., XL and Buell XB models