| 摘要 |
A drive chain adjustment mechanism for a vehicle having two rear wheels includes a swing arm supported on a body frame for vertically pivotal movement, a pipe member fixed to the rear end thereof, and a holder member inserted into the pipe member, which has therethrough an eccentric bore for rotatably supporting a rear wheel axle driven by way of a drive chain. The holder member is provided on at least one end with a plurality of projections, which are recessed to receive a rod-like tool and thereby turn the holder member.
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