My 1984 Venture was making a rumbling sound at idle, which went away if I pulled lightly on the clutch. I pulled the clutch cover off, and removed the clutch. It was apparent that the bearing behind this clutch was distressed.
Late fall is a relatively nice time in Ottawa, Canada. Temperatures vary widely, from highs around 20 (70f) to highs barely above freezing. I put the bike in the back of the garage, borrowed my brother's 1500-watt heater, and set to replacing this bearing. The garage is now very pleasantly warm (and quiet too - I can hear my watch ticking). This is an excellent time of year to spend a bit of time in the garage with the Venture.
The engine can be removed in an afternoon, if you keep steady at it. Since my brain is not total recall, I place each part removed along the garage wall beside the last part I took off. That way re-assembly is just a matter of picking up a row of parts and bolting them back onto the bike.
Once the engine was out I took a series of photos to document the process of changing this bearing.