Billet Aluminum Tappet Block Kit For Big Twin Evolution

Billet Aluminum Tappet Block Kit For Big Twin Evolution

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BILLET ALUMINUM TAPPET BLOCK KIT FOR HARLEY DAVIDSON BIG TWIN EVOLUTION

WEIGHT: 3.68

A REAL IMPROVEMENT OVER THE STOCK TAPPET AND TAPPET BLOCK , THIS CHROME PLATED BILLET ALUMINUM TAPPET BLOCK KIT FROM JIMS IS CNC MACHINED FROM BILLET 7075-T651 ALUMINUM AND HAS A TENSILE STRENGTH THREE TIMES STRONGER THAN CAST ALUMINUM BLOCKS. THESE TAPPET BLOCKS ARE MACHINED TO THE CENTER LINE OF THE CAMSHAFT AND HOLD A PLUS/MINUS OF .002". IN ADDITION , THE BORES ARE HELD PERPENDICULAR TO THE MOUNTING FLANGE TO .0002". THESE TAPPET BLOCKS WILL ACCOMMODATE A GROSS VALVE LIFT OF .625" AT THE VALVES , WHICH ALLOWS A CLEARANCE OF .035 ROLLER TO BLOCK FREE PLAY. THE BLOCKS WILL ACCOMMODATE MOST SMALL BASE CIRCLE CAMS HAVING A LIFT OF .655" OR MORE WITH SIMPLE MODIFICATION. INCLUDED IN THIS KIT ARE FRONT AND REAR TAPPET BLOCKS , FOUR JIMS "BIG AXLE" POWERGLIDE TAPPETS , JAMES TAPPET BLOCK GASKETS AND CHROME TAPPET BLOCK SCREWS. USE TAPPET BLOCK ALIGNMENT TOOL 60735 FOR A PROFESSIONAL JOB. FITS BIG TWIN EVOLUTION 1984/LATER.