Pre Unit Triumph 4 speed gearbox rebuild kit 500 650 Triumph 650 These pistons are manufactured by

These pistons are manufactured by JCC and the rings are exclusively made in England for Hepolite

1 CHAIN ADJUSTER FIBER WASHER ( 57-1738 OR T1738 )

used in many 5 speed Triumph and  BSA applications from 1972-1982

Instead of the typical and lame "refer to your manual" we include our own installation notes written by an experienced engine builder which will help both the installer and/or the machinist doing the work

400" lift at the cam can be used with this spring kit

Pre Unit Triumph 4 speed gearbox rebuild kit 500 650 Triumph 650 These pistons are manufactured byRebuilding a pre unit 4 speed gearbox may not be too hard, but getting all the correct wear parts together sometimes is . After rebuilding these gearboxes for years, I finally put together a kit of all the commonly replaced parts. This kit has most everything you need to get your Triumph pre unit four speed gearbox back into shape. This is for gearboxes from 1950 1960, which have bronze bushings to support the layshaft. If your pre unit gearbox has