S&S Cycle

1926–'84 vintage engines

STEEL ROTARY BREATHER GEARS FOR 1936–’84 BIG TWIN FITMENT • 1936–’84 OHV big twins FEATURES • All steel construction–superior dimensional stability, abrasion • Welded-in screen • Higher flow than stock • Elongated breather pocket scavenge hole for increased suction OPTIONS • Standard diameter for replacement or new builds • +.030" diameter for damaged engines • Breather gear only kits • Breather gear and shim kits

1984–1999 Evolution ® 1926–1984 Vintage Engines Tools & Shop Supplies Warranty & Company Policy Appendix & Index

USPATENT6,899,066 BREATHER VALVE exclusive

33-4250

BREATHER GEAR KITS FOR 1936–'99 BIG TWIN Year of Camshaft Standard Size

+.030" Oversize

106-6010 33-4253 33-4250

106-6013 33-4263 33-4260

1936–Early '47 1948–Early '77 Late 1977–'99

106-5070

BREATHER GEARS ONLY FOR 1936–'99 BIG TWIN Year of Camshaft Standard Size

+.030" Oversize

106-5070 25300-36 33-4246 25313-73

106-6012

1936–Early '47

33-4247

1948–Early '77

33-4241 25310-82A, 25313-77B, 25311-90

33-4242

Late 1977–'99

BREATHER GEAR SPACING SHIM KIT Description

Part #

33-4249

Fits stock 1979–’82 and all S&S® steel breather gears. Includes one of each thickness: .100", .110", .120", .130", .140", .150", .160", .170"

33-4249

137