| 摘要 |
<p>A crank shaft (3) of an engine of a two-cycle engine of a motor bicycle, for example, is operatively connected, through a gear mechanism (5a, 5b), to a balancer shaft (1) which is arranged in parallel thereto and rotatable in synchronism with the crank shaft in a direction reverse to that of the crank shaft. Balance weights (4a, 4b) are secured to both axial ends of the balancer shaft and the balance weight (4a) at one of the axial ends of the balancer shaft comprises two parts (4a, 4a) secured on both sides of a coupling gear (5a) secured to the balancer shaft.</p> |
