JIMS, Powerglide hydraulic tappet. Standard .8425" O.D. - 84-99 B.T.; 86-90 XL; 87-90 Buell (NU) 904127 80-81 FLT REAR)

80-81 FLT REAR)

Compatible with Compu-Fire ignition systems

On stock Big Twin generators

unpainted steel

OEM replacement reference 68555-87

JIMS, Powerglide hydraulic tappet. Standard .8425" O.D. - 84-99 B.T.; 86-90 XL; 87-90 Buell (NU) 904127 80-81 FLT REAR)Jims Powerglide tappets will give you a superior hydraulic function when compared with OEM style equipment, a billet steel body with hand honed hydraulic unitcavity and an oil fed axle. To get full power, you must have zero valve lash and eliminate collapsing of the hydraulic unit as is found in the OEM unit, also called 'the shock absorber syndrome'. Failing to keep the valve open the full amount results in power loss. The Jims Powerglide tappets