Honda 400 Clutch Replacement
 

There are three different clutches, plus it depends on how far you want to go. On the multiplate, you could probably get away with new friction plates $60 in parts. If it is the Centrifugal clutch, $100 for new shoes, but it could need a new drum $150, doubtful if you are referring to the one way clutch, which keeps the centrifugal clutch engaged on the "overrun." New gasket $14, and fresh oil. Labour time about 2.5 hours, but I have spent over an hour extra, removing footwell plastics, when the fastners are rusted solid and bolt heads corroded away.