Patent ID: 7028571

Claim:
A motorcycle engine comprising: a gearbox with a wall defining a cavity, the wall at least partially enclosing the gearbox; a shaft extending through the gearbox, the shaft having a longitudinal axis; a gear coupled to the shaft to rotate about the longitudinal axis; a sliding sleeve coupled to the shaft to rotate with the shaft about the longitudinal axis, the sliding sleeve being adapted to move axially along the shaft; a gearshift fork in mating engagement with the sliding sleeve, the gearshift fork being moveable in a direction parallel to the longitudinal axis to move the sliding sleeve axially along the shaft; a duct extending through the wall, the duct being in fluid communication with a supply of lubricant and with the cavity, the duct positioned adjacent the sliding sleeve and the gearshift fork to direct the lubricant onto at least one of the sliding sleeve and the gearshift fork; and a rib extending from the wall into the cavity, the rib positioned to direct the lubricant from the duct onto the sliding sleeve and the gearshift fork.