S&S Cycle All-Helical Transmission Gear Set Cassettes for Harley-Davidson 1991-05 Dyna, 1991-06 FLT and Softail models, and Custom Applications - Manual (Page 2)

S&S ® Cycle Cassette Assembly Installation Instructions
The S&S ® six-speed gear sets are available for stock transmission cases of 1991-’05 Harley-Davidson ® Dyna TM , 1991-’06 FLT and Softail ®
models—as well as similar aftermarket transmission cases, clearancing is required. If you are not comfortable modifying your
transmission case—or do not have the proper tools to change bearings and remove the clutch assembly—contact the S&S tech line at
(608) 627-TECH for a dealer recommendation.
NOTE:
●
Trap doors are machined different for specific applications.
● S&S PN 56-1255 is intended for 1991-’05 Dyna models and 1991-’99 Softail models with tab for exhaust and starter mounting
brackets.
● S&S PN 56-1222 is intended for 1991-’06 FLT models and 2000-’06 Softail models without the mounting tab on the trap door.
2
Cassette Assembly 56-1222 for FLT & Softail ® Cassette Assembly 56-1255 for Dyna TM & Softail ®
SPECIAL TOOL REQUIREMENTS
● Inner Primary Bearing Race Puller, S&S PN 56-5141 ● Inner Primary Bearing Race Installer, S&S PN 56-5145
● Main Drive Gear Remover/Installer & Bearing Installer ● Primary Drive Locking Tool
● Mainshaft Locknut Wrench ● Output Sprocket Locking Tool ● Shift Shaft Sleeve Remover/Installer
CASSETTE CONTENTS
For more information see exploded view on pages 14-15.
OPTIONAL PARTS
● S&S Inner Primary Bearing Race PN 56-5089, See Picture 28 ● S&S Hydraulic Side Cover PN 56-4060
● S&S Speedometer Calibrator PN 55-1007
ADDITIONAL PARTS REQUIRED
● FLT models will require Oil Filler Spacer Kit, S&S PN 56-1292, See Picture 32
● 1991-’97 H-D ® models will require H-D #72405-98TN and H-D #72405-98BK to adapt from a one-wire neutral switch to a two-wire switch
● Clutch Center Pushrod H-D #37088-90, if installation is for new construction (not required for replacing existing stock H-D transmission)