S&S Cycle - S&S Performance Parts 2025 L - Volume 67

1999-'06

Phone: 608-627-1497

1 -2017-UP 2 -2007-'17 3 -1999-'06 4 -1984-'99 5 -1936-'84 6 -XL-RA1250 7 -BELTS & GASKETS 8 -TOOLS 9 -WARRANTY 10 -APPENDIX

Fitment • 1999–'06 Harley-Davidson® Twin Cam 88® A Engines (except 2006 Dyna®) Features And Benefits • Much stronger than stock crankcases in every aspect, extra large front motor mount for increased strength • Large cam chest allows cam lift up to 675" without clearancing • Timken® style sprocket shaft bearings withstand the most demanding applications • Includes S&S crankcase breather reed valve to eliminate oil carry-over and oil scavenging problems • Clearanced for strokes up to 5" • All passages between the crankcase and the cam support plate are o-ring sealed • Includes pinion and Timken® bearing • stock bore and 4 1/8" bore cases come with Dual Spray Piston Cooling Jets

Options • Available in stock bore, 4" bore, and 41/8" bore versions

Kit Includes • S&S crankcase

• S&S breather reed valve • Bearings and hardware

Crankcase For 1999–'06 Big Twin Engines (Except 2006 Dyna® Models) Crankcase Bore Size

Silver

Wrinkle Black

Stock Bore (Stock Stud Pattern) 41/8" Bore (Stock Stud Pattern) 41/8" Bore (S&S Stud Pattern)

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31-0172A 31-0181A 31-0178A

106-4057A 106-4043A

4 425" Bore (S&S® T143) 310-0721A NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE. NOT LEGAL FOR SALE OR USE NATIONWIDE ON ANY FEDERAL POLLUTION CONTROLLED MOTOR VEHICLE UNDER THE CLEAN AIR ACT —

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