ENGINE SECTION RED PART NUMBERS INDICATE NEW PARTS 6-44 1 2 3 4 5 6 7 8 9 10 11 CONTENTS REFERENCE GENERAL EXHAUST FUEL DRIVE TRAIN ENGINE WHEEL CONTROL FRONT END FRAME ELECTRICAL Pistons Parts included with all piston kits. • Wiseco pistons are forged from hi-silicon aluminum alloy for superior strength and dependability. • The unique piston shape allows tight piston-to-wall clearances for quieter operation. • Grooves are machined around the top ring lands to reduce detonation and improve the sealing power of the top ring. • Designed for Stock stroke flywheels only. • All wrist pin holes are ream fit for a perfect geometrical surface. • Enlarged valve pockets provide the clearance for larger valves and high lift cams, but must be checked. • Includes Instructions and clearance recommendations. Replacement Model, Year & Compression Bore Piston Kit Ring Set Replacement Piston Displacement Ratio Size Part # For 1 Piston Lock Ring Pair Style Panhead 1948/1965, 9:1 Std. 3.437” 62131 63010 63026 Shovelhead .010” O.S. 62132 –– 1966/1977, .020” O.S. 62133 63012 1200cc (74ci) .030” O.S. 62134 63013 .040” O.S. 62135 63014 .060” O.S. 62137 63016 Shovelhead 7:1 Std. 3.497” 62139 63016 63026 1978/1984 .010” O.S. 62140 63018 1340cc (80ci) .020” O.S. 62141 63017 .030” O.S. 62142 63019 9.5:1 Std. 3.497” 62144 63016 63026 .020” O.S. 62146 63017 .030” O.S. 62147 63019 .040” O.S. 62148 63020 Big Twin Evolution 8.5:1 Std. 3.497” 62164 63016 63026 1984/1999 .010” O.S. 62165 63018 1340cc (80ci) .020” O.S. 62166 63017 .030” O.S. 62167 63019 10:1 Std. 3.497” 62248 63016 63026 .005” O.S. 62259 63004 .010” O.S. 62260 63018 .020” O.S. 62261 63017 .030” O.S. 62262 63019 Twin Cam 10.5:1 Std. 3.937” 62251 –– 65103 1999/2014 (97ci) Twin Cam 10.5:1 Std 3.875” 62252 63021 65103 1999/2014 .010” O.S. 62253 –– (103ci) Twin Cam 10.5:1 Std 4.000” 62254 –– 65103 CVO Models (110ci) FORGED PISTON KITS AND REPLACEMENT PARTS FOR BIG TWIN
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