'02 Vulcan 750, 27k
Join Date: Aug 2014
Location: San Francisco, CA, USA
Couple issues, might be related..
I posted this in my newbie check-in, but realized it'll probably get more thoughts here.
I initially thought this might be related to a fuel filter or sediment in the tank - but I'm increasing thinking it's carb or cam related.
I have an intermittent (though growing more frequent) loss of engine power. It just drops for half a second - just long enough to be noticeable. I haven't noticed a corresponding drop in RPM, but that might be due to the tach's stalk shaking around alot, making it difficult to do a fine reading while I'm riding.
When idling, the RPMs bounce around a bit (~200ish range). Not sure if that's related or normal.
What I did think was related - and made me think of a fuel filter - the engine starts to act like it's running out of gas after using only 2.5 gal. It'll even sputter to a stop. I realized a couple days ago that I didn't test it for the phantom-out-of-gas condition... It also will sometimes die when the engine is still cold. Fully open choke helps prevent this - but does not completely eliminate it.
Alternately, someone mentioned that they heard cam chain noise and that I needed to replace the chain/tensioners. Could that be the cause instead? I don't really know what to listen for, so I can't validate that it was cam chain noise.