Accurate reproductions of the mainshafts for 3-speed transmissions of pre-war models.

While all other gears of the 3-speed transmissions in 1915-35 Big Twins are in good condition, the sliding gear (1st and 2nd main shaft) is mostly shot. These high quality replacement gears put your tranny back into service again.

Accurate reproductions of the main drive gear bearing races for 3-speed transmissions.

Right side bearing for the mainshaft, which replaces your worn period part. This is a quality bearing, which has the correct offset and which fits perfectly, unlike a cheap 52x20 mm hardware store bearing, which simply does not work properly here.