Patent ID: 7581467

Claim:
A motorcycle transmission, comprising: (a) a shaft mounted for rotation in a transmission housing, the shaft having a first end supported in the housing and a second end supported proximate a trap door; (b) a plurality of gears rotatably mounted on the shaft; (c) a countershaft mounted for rotation in the transmission housing, the countershaft having a first end supported in the housing and a second end supported proximate the trap door; (d) a plurality of counter gears rotatably mounted on the countershaft; (e) the trap door having a cylindrical surface forming a bore; (f) a flange operatively connected to the trap door proximate a first end of the cylindrical surface, the flange defining a stop; (g) a bearing having an inner race, an outer race, a first side and a second side, the bearing positioned with a first side proximate the flange; (h) a threaded surface formed in the cylindrical surface proximate a second end of the cylindrical surface; and (i) a retainer having a threaded outer surface sized and configured to be connected to the cylindrical surface's threaded surface, wherein when threaded, the retainer holds in place the outer race from the second side.