ENGINE SECTION RED PART NUMBERS INDICATE NEW PARTS 6-41 1 2 3 4 5 6 7 8 9 10 11 CONTENTS ELECTRICAL FRAME FRONT END CONTROL WHEEL ENGINE DRIVE TRAIN FUEL EXHAUST GENERAL REFERENCE CAST PISTON KITS FOR SPORTSTER Pistons Moly Fits STD Displacement Compression Ratio Size Part # Part # Ironhead Sportster 54ci - 900cc 9.5:1 ( Std. Compression) STD Bore (3”) 62216 62122 1957/1971 +.010” 62217 62125 +.020” 62410 62123 +.030” 62218 62413 +.040” 62412 62124 +.050” 62219 62414 +.060” 62220 ----- 62410 62122 Moly Fits STD Displacement Compression Ratio Size Part # Part # Ironhead Sportster* 61 ci - 1000cc 8.5:1 (Low Compression) STD Bore (3 3/16”) 62222 62417 1972/1985 +.010” 62501 62418 +.020” 62502 62419 +.030” 62223 62433 +.040” 62504 62420 +.050” 62505 ----- +.060” 62224 ----- 62502 62417 Moly Fits STD Displacement Compression Ratio Size Part # Part # Ironhead Sportster* 61 ci - 1000cc 9.5:1 (Std Compression) STD Bore (3 3/16”) 62508 62435 1972/1985 +.010” 62509 62436 +.020” 62510 62437 +.030” 62511 62438 +.040” 62512 62439 +.050” 62149 62440 62508 62438 Moly Fits STD Displacement Compression Ratio Size Part # Part # Sportster 1988/2003 74ci - 1200cc 9:1 (Std Compression) STD Bore (3 1/2”) 62179 62448 +.005” 62180 62442 +.010” 62181 62447 +.020” 62182 62444 +.030” 62225 62445 +.040” 62226 ----- 62179 62445 *It is not recommended to bore Sportster 1972/ Early 1973 models more than .030” OS.
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