Engine unit and straddle type vehicle

摘要

A V-belt-type continuously variable transmission (CVT) of an engine unit has a secondary sheave shaft 62, which rotates with a clutch housing 78 of a centrifugal clutch 41. The secondary sheave shaft 62 is supported in a cantilever fashion via bearings 75 and 76. The engine unit has a gear 80, which rotates with a clutch boss 77. Between the secondary sheave shaft 62 and the gear 80, bearings 81 (81a and 81 b) formed with cage-and-roller needle bearings, a type of a needle bearing, are inserted. Such an arrangement can prevent abrasions and deterioration of a bearing inserted between a rotational shaft supported in a cantilever fashion and a body of rotation while avoiding enlargement of the unit.