JIMS, Hydrosolid tappet. Standard .8425" O.D. - 84-99 Evo Big Twin, 86-90 Sportster; 87-90 Buell (NU) 904413 (Sold each not pair)

(Sold each not pair)

OEM replacement reference 67737-88T

1 gallon capacity

Direct replacement for large cork OEM 17955-48 lower pushrod seal

JIMS, Hydrosolid tappet. Standard .8425" O.D. - 84-99 Evo Big Twin, 86-90 Sportster; 87-90 Buell (NU) 904413 (Sold each not pair)Must be used with adjustable pushrods. Jims 'Hydrosolid' tappets have broken the limitations of all previous hydraulic tappet designs and is the best Jims tappet that is offered. This tappet works like a hydraulic tappet to about 5500 RPM, and then turns into a solid al the way up to where your rev. limiter takes control. At the time it turns into a solid the Jims Hydrosolid will add 3 6 horsepower. Even when the tappet rollers start lifting of the