S&S Cycle

1999–2006 big twins

CRANKCASES 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 OPTIONS • Available in stock bore, 4" bore, and 41⁄8" bore versions KIT CONTENTS • S&S crankcase

96 ™ /103 ™ /110 ™ Street Rod ™ Milwaukee-Eight ® 1999–2006 Twin Cam 88 ® 1986–2019 Sportster ® & Buell ® Indian ® Models

2007–2017 Twin Cam

USPATENTPENDING FLUID LINE CONNECTOR exclusive

• S&S breather reed valve • Bearings and hardware

CRANKCASE FOR 1999–'06 BIG TWIN ENGINES (EXCEPT 2006 DYNA® MODELS) Crankcase Bore Size Silver

2014–2019 Street ® &

Wrinkle Black

Polished

106-4039A 106-4057A 106-4043A

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

– –

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

31-0179A

4.425" Bore (S&S® T143) 310-0721A DISCLAIMER: 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 —

31-0424

OIL LINE INSTALLATION KIT Fitment Part # 1999–'06 FLT Models 31-0425 1999–'05 Dyna® Models 31-0424

REPLACEMENT PARTS: SEE PAGE 212

Tools & Shop Supplies

Warranty & Company Policy

Index

Appendix &

Oil line installation kit part #31-0424 is required for installation in 1999–’05 Dyna® models. This kit includes a special transmission top cover and oil lines. Oil line installation kit part #31-0425 is required for installation in 2000–'06 FLT models. Stock transmission top cover may be used. The Oil line installation kits are not required for the updated S&S T-series engines. If the part number of the engine ends in "A," it does not need an installation kit. NOTES

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