1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 TAPPET BLOCK KIT

Part Number: 91-750

TAPPET BLOCK KIT - Part Number 91-750
* Front & rear tappet blocks * 4 Big Axle "Powerglide" tappets. * Tappet block gaskets * Chrome tappet block screws Designed to accommodate a gross valve lift of .550" at the valves. This is about .350" at the tappets, leaving a clearance of .035" roller-to-block free play. (Please note: if using a cam with a higher lift, a simple modification is all that is needed.) These blocks will clear most small base circle cams having a lift of .600" or more. Jims Evolution tappet block kit was produced to improve the stock tappet and tappet block area. Made from billet 7075-T651 aluminum with a tensile strength 3 times stronger than cast aluminum tappet blocks. These tappet blocks are machined to the center line of the cam and hold +.002" Also, the bores are held perpendicular to the mounting flange to +.002". Add the precision quality of Jims "Big Axle" tappet and you can't buy a better tappet block kit for your bike (gaskets and chrome screws included). For the ultimate in valve train technology, and stability, add Jims Roller Rocker Arms (20 grams lighter than stock) and Jims billet cam cover (use with any Evolution Big Twin adjustable pushrods).
With the new chrome blocks 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974

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