S&S Cycle

CRANKCASE BREATHER REED VALVES FITMENT • Twin Cam 88®/96™ (except "B" engines) • S&S T-Series engines

USPATENT6,899,066 BREATHER VALVE exclusive

FEATURES AND BENEFITS • Improved oil scavenging and reduced oil carryover

31-2070

CRANKCASE BREATHER REED VALVES Oil Pump Fitment Year Application

Part #

1999–’02 2003–’10

31-2070 USA 310-0742 USA

For Engines with Stock or S&S TC3 Oil Pump

310-0742

S&S special application crankcases*

For Engines with S&S gear oil pump

2003–’10 stock crankcases & 1999–'06 S&S crankcases 310-0742

*Spring adaptor required to accommodate the extra .375" case width of S&S Special Application big bore crankcases.

SPRING ADAPTER AND SPACER Fitment Part # Spacer (for S&S SA crankcases)* 31-2103 *Required to accommodate the extra .375" case width of S&S Special Application big bore crankcases.

REPLACEMENT PARTS: SEE PAGE 238

The crankcases breather valve for Twin Cam 88® engines was designed and developed for use with stock Harley-Davidson® or S&S gear oil pumps and tappets, and may not be compatible with some aftermarket components. Not available for Twin Cam 88B™ or Twin Cam 96B™ engines with internal balancers. Does not fit with Screamin' Eagle® oil pumps. NOTES

172 Order 608-627-1497 S&S Late Models 1999–up