Page 24 of Transmission & Kickstart by Zodiac

6-speed transmission conversion kits new · complete transmission fits 1991-1999 softail models · cassette fits 1991 thru 2005 flt and softail models · retrofittable to 1986 thru 1990 models complete transmissions for 1991-1999 softail models s&s complete transmissions will fit 1991-1999 evolution softail models but can retrofit to 1986 thru 1990 models if a late clutch and a starter adapter are installed 750592 natural finish 750593 black powder coat finish 750594 polished finish s&s helical gear six-speed transmission the new s&s six-speed transmission features helical gears throughout to reduce noise lash in the shifting mechanism is reduced because the design uses shifting rings instead of the usual dog and pocket design the unique s&s roller detent shifter mechanism dog-less low inertia shifting rings and high aperture ratio provide smooth guarantee positive shifting in addition a simple but effective modification to the design of the main shaft bearing race positively prevents the race from walking into the mainshaft seal and potentially destroying the output gear this improved bearing race can be retrofitted in stock transmissions as well provides the same positive protection top gear has a 1:1 ratio and the transmission is supplied with a 34-tooth front pulley when used with a stock rear pulley the supplied 34-tooth pulley yields a final drive ratio that is equivalent to that of most overdrive six-speeds but there is a difference top gear in an overdrive transmission goes through a meshed pair of gears to achieve the higher gear ratio top gear in the s&s six-speed is 1:1 which means that the input shaft is simply locked to the output shaft and no gears are involved at all the advantage is less noise and less power lost first gear has a lower ratio than on a stock transmission so even with the 34-tooth pulley the final drive ratio in first gear is the same as stock conditions and differing applications may require the use of different pulley sizes · designed to handle the power of big inch s&s motors · all helical gears for quiet operation · dogless low inertia high aperture ratio shifting rings and roller shift detent for smooth positive shifting · 1:1 final ratio supplied with an ultra light 34-tooth front pulley for the optimum final drive ratio with stock rear pulley same as most overdrive six-speeds pulley is 30 lighter than stock · available as complete transmission assembly with s&s transmission cases in natural aluminum black wrinkle powder coat and polished finish · gear set cassette only available for installation in stock or aftermarket transmission cases­minor clearancing operation required 09-024 new 09 gear set cassette assemblies fit 1991 thru 1999 softail models and 1991 thru 2005 flh and flt models the s&s six-speed transmission may also be purchased as a gear set cassette the cassette version includes all the gears and the shifting mechanism assembled in an s&s polished trap door the cassette may be installed in stock and most aftermarket transmission cases with only minor modifications stock cases must be clearanced for the additional shifting fork cassettes fit 1991 thru 2005 evolution and twin-cam 88 flt and softail models but can also retrofit to 1986 thru 1990 models with the appropriate late style clutch and starter adapter 750595 gear set cassette assembly optional parts 750597 improved mainshaft bearing race 750596 oil filler spacer kit for flh and flt models

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