Patent ID: 7562643

Claim:
A lift adjustment device for a valve mechanism connected by a plurality of links to a valve cam that contacts and lifts intake/exhaust valves and a rotating drive shaft connected to a crankshaft, the device comprising: a connector pin, inserted into two of the plurality of links, that connects both links and allows for their relative rotation; a lift adjustment means wherein the connector pin position is adjustable from a single direction using a prescribed adjustment tool; and a pin guide hole into which the connector pin, which is radially moveable in a prescribed adjustment direction, mates at a pin mating portion on one of the two links; and the lift adjustment means that is provided with a pair of holders, first holder and second holder, that sandwich and hold the connector pin in the prescribed adjustment direction, with the position of the connector pin being adjusted by adjusting the first holder and second holder wherein a configuration in which positional adjustment of the first holder and second holder is performed from the single direction.