1985-1999 EVO Bathtub Big Bore (Fits STD Brand Heads Only)      Select Another New Engine 1984-2001 1200 Sportster 1986-2004 883 Sportster Flat Track 1985-2004 883/1200 Sportster Conversion Kit Buell S1, White Lightning-S3/S3T, Thunderbolt - 101hp w/Thunderstorm Heads 1985-1999 EVO 1985-1999 EVO 1985-1999 EVO Big Bore Kits 1985-1999 EVO 1985-1999 EVO 1985-1999 EVO Bathtub (Fits STD Brand Heads Only) 1985-1999 EVO Bathtub Big Bore (Fits STD Brand Heads Only) 1985-1999 EVO Bathtub Big Bore (Fits STD Brand Heads Only) 1978-1984 Shovelhead 80" 1978-1984 Shovelhead 80" 1978-1984 Shovelhead 89" S&S 113" 1999-2006 Twin Cam 1999-2004 Twin Cam Big Bore 1999-2004 Twin Cam Big Bore 2007-2008 Twin Cam 96" 2007-2008 Twin Cam 103"

Machined from 2618 T6 high tensile forged aluminum Dome/Dish features smooth flowing radii and require no deburring or preparation JE designs are specifically engineered for extreme applications including professional competition Pins, pin fitment, lock and rings included

Std Bore: 3.625"

Disp. Bore Size Over Size Piston Kit # Comp Ratio Gram Weight Skirt Style Ring # Pin # Lock # Gasket # Sleeve # 1438cc 3.625" STD 144902 11.5:1 418g Round J150F8-3625 792-2500-14-51C 787-050-MW JC9691 Bore & Hone 1446cc 3.635" +.010" 144903 11.5:1 428g Round J160F1-3635 792-2500-14-51C 787-050-MW JC9691 Bore & Hone

- Denotes part # has been issued a new part #. A list referencing old part #s to their new counterparts will be available shortly.

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