S&S Cycle

SUPER STOCK ® ALTERNATOR STYLE CRANKCASES FOR 1970–’84 BIG TWIN ENGINES FITMENT • 1970–'84 big twins FEATURES AND BENEFITS • Available for stock, 35⁄8", and 313/16" bore applications • Compatible with stock 1970–up flywheel assemblies, primary covers and gearcovers • Clearanced for 38 amp alternator stators

31-0004

• Pre-clearanced for strokes up to and including 5" • Complete with bearings and installation hardware KIT CONTENTS • Crankcase assembly • All required bearings and hardware for installation • Assembly instructions

EO #D-355-8

SUPER STOCK® ALTERNATOR CRANKCASES FOR 1970–'84 BIG TWIN ± Crankcase Style Finish Stock Bore 35⁄8" Bore

35⁄8" Bore (Small Diameter)

313⁄16" Bore

31-0004 31-0002*

31-0003 † 31-0002*

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–

1970–'84

Natural Specify

31-0002*

31-0002*

Special Order*

Special Orders: S&S Super Stock alternator crankcases can be special ordered for cylinder bore sizes up to 313/16" and deck heights as much as 3/16" taller than stock. A special order sheet must be filled out for any special order crankcases. Ask your S&S Customer Support Representative or download special order forms from our website at www.sscycle.com/soforms NOTES: 1981–’84 style oil pump. Includes primary scavenge port machining. Machined for 1970 & later alloy primary. † Exempt from emissions tampering regulations under CARB EO# D-355-8 when used with stock bore cylinders *Download the Special Order Form at sscycle.com/soforms ± WARNING:CancerandReproductiveHarm–www.P65Warnings.ca.gov

REPLACEMENT PARTS: SEE PAGE 176

FLYWHEELS FOR 1937–'73 45" FLATHEAD ENGINES

FITMENT • 1937–'52W/WR models • 1952–'53 KR & all K models (excluding KH) • 1932–'73 G models FEATURES AND BENEFITS • 313/16" stroke

• Complete S&S connecting rod set–includes special crankpin, rods, bearings and cages • Compatible with stock 45" KR rods or rods for 1957–"84 Sportster® models, when used with the special crankpin

WILL NOT FIT KH MODELS !

FLYWHEELS FOR 1937–'73 45" FLATHEAD ENGINES Description S&S Replacement Flywheels for 45" Flathead 23925-37 *Special Order: Download the Special Order Form at sscycle.com/soforms

Part #

32-3013

TRYING TO IDENTIFY A SET OF S&S FLYWHEELS? SEE FLYWHEEL I. D. CHART ON PAGE 226

126 S&S Vintage 1926–1999 Order 608-627-1497