Hey all! I recently bought my 93 Vulcan and wanted to ask you guys a few questions. I have about 3 issues I'd like your guys' opinion on.
1) When I warm the bike up in the morning, the exhaust will blow out a fair amount of white smoke. This will go on for about half a minute then stop, lol so far this is how I've been knowing that the engine is warmed up, is this something to worry about? It doesn't do it the rest of the day, just that first warm up in the morning.
2) I sometimes backfire in the mornings before the bike will start. After the backfire, it will usually start right up. Any ideas on what could be causing this?
3) I took the bike up the grapevine (I5) over the weekend, which is a fairly substantial elevation change. Once I was at the top, the bike would lose power going around 70-80 and die. I'd pull over and after a couple tries the bike would start back up. I could maintain about 60-65. I had remembered that there was an air mixture knob on my old bike (07 Honda Rebel) that you would adjust based on your elevation, and thought there would be something similar. Quick search online, found the air mixture screws and turned them one full turn. Never got back up to 70 or higher after that (stupid LA traffic), but on the way home I was riding 80 without problems. Although this was at night, dunno if that makes any difference.
I was looking through the service manual to see what the air screw should be set to, but was unable to find anything about them. Was I off base in my diagnosis earlier? How do I make sure I have those screws adjusted correctly?
Be forewarned, your dealing with someone who has just enough mechanical knowledge to be dangerous.