"PRIME" is on the the older models (85-87 I think), and was removed / replaced by "OFF".Is this a vulcan 750? Mine has 3 positions, ON, OFF and RESERVE. Never heard of Prime. Unless its an older model or the petcock has been replaced before. This fuel system has 3 lines that go to the fuel tank petcock. One for each carb and the other is a vacuume line. For fuel to flow to the carbs a vacuume has to be felt on the vacuume (center) line.
thanks KC I guess I was typing this the same time you were.
Thanks, I guess I need to get in there and do some cleaning. I didn't really want to mess with it, but I will go on and clean it. Will it hurt anything running it on prime. Just curious?
just be careful with the screen that is on the upper section of the petcock and sits inside the tank. some are brass and some plastic but both may be brittle. I cleaned up mine with a pipe cleaner. you may want to just buy a rebuild kit on ebay. I don't think they are all that expensive. I would probably just drive it on prime until a rainy weekend came around, and just move it to ON when you're done riding, which in this case would be turning it off because even if you have a small leak in one float that maybe isn't noticeable when it's running, over time you'll contami'minate your motor oil. Hope that helpsThanks, I guess I need to get in there and do some cleaning. I didn't really want to mess with it, but I will go on and clean it. Will it hurt anything running it on prime. Just curious?