Abstract: A motorcycle transmission is provided which includes a transmission case, an end cover, and a mainshaft gear shaft. The transmission case includes a main portion and a trapdoor. The end cover extends from the trap door. The mainshaft gear shaft is supported by circular bearings placed in the main portion, trapdoor, and the end cover. A lubricant path extends from inside the transmission case, through the walls of the transmission case and the end cover, to the circular bearing in the end cover.

Abstract: A six speed gear assembly for a motorcycle transmission is provided that includes a mainshaft gear shaft with a plurality of mainshaft gears mounted in sequence thereon, wherein the sequence includes a mainshaft 4th gear, a mainshaft 3rd gear, one of a mainshaft 1st gear and a mainshaft 2nd gear, the other of the mainshaft 1st gear and the mainshaft 2nd gear, a mainshaft 6th gear, and a mainshaft 5th gear. The six speed gear assembly also includes a countershaft gear shaft with a plurality of countershaft gears mounted in sequence thereon, wherein the sequence includes a countershaft 4th gear, a countershaft 3rd gear, one of a countershaft 1st countershaft 1st gear and a countershaft 2nd gear, the other of the countershaft 1st gear and the countershaft 2nd gear, a countershaft 6th gear, and a countershaft 5th gear.