Buell S1, White Lightning-S3/S3T, Thunderbolt - 101hp w/ Thunderstorm Heads      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"

Std Bore: 3.498"

Disp. Bore Size Over Size Piston Part # Comp Ratio Gram Weight Skirt Style Ring # Pin # Lock # Gasket # Sleve # 1200CC 3.498" STD 161949 10:1 333g Round J140F1-3498 792-2500-14-51C 787-050-MW JC9689 Deglaze Only 1207CC 3.508" +.010" 161950 10:1 337g Round J140F1-3508 792-2500-14-51C 787-050-MW JC9689 Bore & Hone 1214CC 3.518" +.020" 161951 10:1 336g Round J140F1-3508 792-2500-14-51C 787-050-MW JC9689 Bore & Hone 1221CC 3.528" +.030" 161952 10:1 341g Round J140F1-3508 792-2500-14-51C 787-050-MW JC9689 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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