Patent ID: 7306085

Claim:
A clutch device for a motorcycle, comprising: a body comprising a side; at least two centrifugal weights pivotably mounted on the side of the body, each of said at least two centrifugal weights comprising a clutch plate on an outer periphery face thereof, each of said at least two centrifugal weights further comprising a through-hole extending from an inner side thereof through the outer periphery face thereof; a spring-attaching member mounted in the through-hole of each of said at least two centrifugal weights and comprising a first end and a second end that has a screw hole, an adjusting screw being mounted in each said spring-attaching member; and at least two springs each comprising a first end attached to an associated one of said at least two centrifugal weights and a second end attached to the first end of the spring-attaching member on another one of said at least two centrifugal weights; each said spring-attaching member moving along a longitudinal direction of an associated one of the through-holes when an associated one of the adjusting screws is turned, thereby adjusting tightness of an associated one of said at least two springs.