- It is torque, not horsepower that destroys clutches, transmissions and drivebelts
- Increase your torque handling capacity to 250 ft-lb. with the Torquebox
- The Torquebox increases torque capacity by increasing the center-distance between the two shafts from the 2 1/2" transmission standard to a full 3" center-distance
- Torquebox features include a billet aluminum transmission case; 2" dia. shift drum; ratchet pawl with overshift inhibitor and 65% larger shaft; top mounted ignition kill and neutral switches for easy adjustments; frictionless detent system; 9310 steel shafts and 8620 steel gears with double-thick, heat-treated teeth; Baker's dual-rail shift forks and a shift system lever ratio that is 35% under stock for tight, short shifts
- All frame, starter and clutch interfaces are identical to stock-based designs
- Fits listed models with left-side drive
- R-ratio gears
RATIO CHART- Gears: R-Ratio = Z-Ratio
1st ------ 2.75 ------ 2.61
2nd ------ 2.05 ------ 1.89
3rd ------ 1.55 ------ 1.50
4th ------ 1.18 ------ 1.12
5th ------ 1.00 ------ 1.00
6th ------- .86 ------- .95
NOTE: Includes a 23 tooth chain-drive front sprocket, will not accept a belt-drive pulley
For Z-ratio gears us 14-9822
NOTE: This item ships 3-4 days after the order is placed
Specs Baker Drivetrain Torquebox 6-Speed Transmissions w/R-Ratio Gears - Left-Side Drive for Softails TB621L
- Type: 6-Speed Transmission
- Units: Each
Fitment Baker Drivetrain Torquebox 6-Speed Transmissions w/R-Ratio Gears - Left-Side Drive for Softails TB621L
- Part 149820 fits the following machines:
- 1990 Harley-Davidson Heritage Softail Classic - FLSTC
- 1991 Harley-Davidson Heritage Softail Classic - FLSTC
- 1992 Harley-Davidson Heritage Softail Classic - FLSTC
- 1993 Harley-Davidson Heritage Softail Classic - FLSTC
- 1994 Harley-Davidson Heritage Softail Classic - FLSTC
- 1995 Harley-Davidson Heritage Softail Classic - FLSTC
- 1996 Harley-Davidson Heritage Softail Classic - FLSTC
- 1997 Harley-Davidson Heritage Softail Classic - FLSTC
- 1998 Harley-Davidson Heritage Softail Classic - FLSTC
- 1999 Harley-Davidson Heritage Softail Classic - FLSTC
- 1990 Harley-Davidson Heritage Softail - FLST
- 1993 Harley-Davidson Heritage Softail Nostalgia - FLSTN
- 1994 Harley-Davidson Heritage Softail Special - FLSTN
- 1995 Harley-Davidson Heritage Softail Special - FLSTN
- 1996 Harley-Davidson Heritage Softail Special - FLSTN
- 1997 Harley-Davidson Heritage Softail Springer - FLSTS
- 1998 Harley-Davidson Heritage Softail Springer - FLSTS
- 1999 Harley-Davidson Heritage Softail Springer - FLSTS
- 1990 Harley-Davidson Softail Custom - FXSTC
- 1991 Harley-Davidson Softail Custom - FXSTC
- 1992 Harley-Davidson Softail Custom - FXSTC
- 1993 Harley-Davidson Softail Custom - FXSTC
- 1994 Harley-Davidson Softail Custom - FXSTC
- 1995 Harley-Davidson Softail Custom - FXSTC
- 1996 Harley-Davidson Softail Custom - FXSTC
- 1997 Harley-Davidson Softail Custom - FXSTC
- 1998 Harley-Davidson Softail Custom - FXSTC
- 1999 Harley-Davidson Softail Custom - FXSTC
- 1990 Harley-Davidson Softail Fat Boy - FLSTF
- 1991 Harley-Davidson Softail Fat Boy - FLSTF
- 1992 Harley-Davidson Softail Fat Boy - FLSTF
- 1993 Harley-Davidson Softail Fat Boy - FLSTF
- 1994 Harley-Davidson Softail Fat Boy - FLSTF
- 1995 Harley-Davidson Softail Fat Boy - FLSTF
- 1996 Harley-Davidson Softail Fat Boy - FLSTF
- 1997 Harley-Davidson Softail Fat Boy - FLSTF
- 1998 Harley-Davidson Softail Fat Boy - FLSTF
- 1999 Harley-Davidson Softail Fat Boy - FLSTF
- 1990 Harley-Davidson Softail - FXST
- 1991 Harley-Davidson Softail - FXST
- 1992 Harley-Davidson Softail - FXST
- 1993 Harley-Davidson Softail - FXST
- 1999 Harley-Davidson Softail Night Train - FXSTB
- 1995 Harley-Davidson Softail Springer Bad Boy - FXSTSB
- 1996 Harley-Davidson Softail Springer Bad Boy - FXSTSB
- 1997 Harley-Davidson Softail Springer Bad Boy - FXSTSB
- 1990 Harley-Davidson Softail Springer - FXSTS
- 1991 Harley-Davidson Softail Springer - FXSTS
- 1992 Harley-Davidson Softail Springer - FXSTS
- 1993 Harley-Davidson Softail Springer - FXSTS
- 1994 Harley-Davidson Softail Springer - FXSTS
- 1995 Harley-Davidson Softail Springer - FXSTS
- 1996 Harley-Davidson Softail Springer - FXSTS
- 1997 Harley-Davidson Softail Springer - FXSTS
- 1998 Harley-Davidson Softail Springer - FXSTS
- 1999 Harley-Davidson Softail Springer - FXSTS
- 1999 Harley-Davidson Softail Standard - FXST
Images Baker Drivetrain Torquebox 6-Speed Transmissions w/R-Ratio Gears - Left-Side Drive for Softails TB621L
(click on photo(s) for larger images)
Baker Drivetrain Torquebox 6-Speed Transmissions w/R-Ratio Gears - Left-Side Drive for Softails TB621L
Sizing Baker Drivetrain Torquebox 6-Speed Transmissions w/R-Ratio Gears - Left-Side Drive for Softails TB621Lsizing
Sendtofriend Baker Drivetrain Torquebox 6-Speed Transmissions w/R-Ratio Gears - Left-Side Drive for Softails TB621L