Help with clutch issue diagnosis

[Cragar67]

Hi, new member here. i have an 85 CB650 with 36k miles. on yesterdays ride i noticed a clutch related issue. the clutch lever started to get really stiff and when rolling and pulling the clutch in there was a whirring/pulsing noise that would go up and down as the wheel speed went up and down. i checked the fluid level before the ride but will check again today. any thoughts? thanks in advance.

[mollusc]

Sounds like your slave cylinder may need to be cleaned and rebuilt.  If it stops releasing pressure, the clutch actuating rod might not be moving all the way.

[draser]

Also, check the return port - small hole - in the master. Does it sound/feel like slipping?

[Cragar67]

thanks, will do. the clutch isn't slipping. just a noise that mimcis the wheel rotation speed.