Ss-cycle Bore Big Twin Stroker Kit 1936–1999 3 7/16 - 3 1/2 User Manual download pdf (Page 3)

S&S® FLYWHEEL ASSEMBLY TORQUE SPECIFICATIONS

Stock Harley-Davidson®

Shafts

S&S Shafts (Street) S&S Shafts (Racing)

Big Twin

Sprocket Shaft 290-320 400-450 450-500

Pinion Shaft 140-170 275-300 275-300

Crankpin Nut 180-210 350-400 450-500

Sportster® Model

Sprocket Shaft 100-120 340-360 350-400

Pinion Shaft—pre-1985

Sportster® Models

100-120 180-200 200-250

Pinion Shaft—1985-up

Sportster® Models

100-120 340-360 350-400

Crankpin Nut 150 -175 290-310 350-400*

*Using S&S sprocket shaft nut on crankpin

S&S® FLYWHEEL IDENTIFICATION CODES FOR 1936UP BIG TWIN

Stroke Code Stroke Year Code Engine Year Sprocket Shaft Pinion Shaft Crankpin Type Diameter Code Flywheel Diameter

1 4⁄" E 1936-'54 Stock Stock 1941-'81 None 8½" (Stock)

2 4½" L 1955-'71 Stock Stock 1941-'81 A 8⁄"

3 4¾" AL 1972-Early '81 Stock Stock 1941-'81 X 8¼"

4 5" SE 1955-Early '81 S&S Stock 1941-'81

5 4¼" (Stock 80") BL Late 1981-'99 Stock Stock 1981-'99

6 4⁄" SL Late 1981-'99 S&S Stock 1981-'99

9 Special order SF 1999-up Press In Press In Press In

12 5¼" SG S&S 4⁄" Bore Press In Press In Press In

13 3½" (Stock 61") SM 1995-'99 EFI Press In S&S 1981-'99

14 3⁄" (Stock 74") Y 74/80 Indian® Stock Stock Stock

16 5⁄"

17 4"

18 3⁄"

19 4⁄"

TA 3⁄"

Titan Special

TB 4.450"

FLYWHEEL IDENTIFICATION

Style, stroke, and diameter of S&S® ywheels can be determined by examining the serial number which is stamped on the rim of both ywheels

in the set. Usually the ywheel serial number can be read through the timing plug hole of an assembled engine. Press-together ywheel serial

numbers are stamped on the inside rim of S&S ywheels. A cylinder must be removed in order to read serial number.

S1234-3 SLX

Year of

Manufacture

Engine Style Flywheel

Diameter

Serial Number Flywheel Stroke

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Ss-cycle Bore Big Twin Stroker Kit 1936–1999 3 7/16 - 3 1/2 User Manual Page 3

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