Issue: Bike had a lot of trouble starting for a few days and whenever it would start there would be a good amount of smoke coming out of the exhaust which would disappear after half a minute or so. Got ready to go to school one morning and started it up after 10 minutes of babying and there was an enormous amount of smoke coming out of the back end for a good 5 minutes or so. Turned it off, started it up again and it idled alright for a few minutes then completely died.
Since then I've:
- Checked spark plugs (little oily but cleaned them, performed a spark test and they looked healthy)
- Taken off the exhaust and carb to look at the intake and exhaust valves for oil leakage. Nothing out of the normal for any of them except one of my exhaust ports is covered with a thin film of what seems to be burnt oil.
I brainstormed with a roommate and we think it might be a leaking valve seal, but I don't think that should prevent the bike from starting up at all.
Tried starting it for a good 20 minutes...cranks pretty well and seems half a second from roaring to life but just never does.
Any ideas? baby GS is my main commute to school so input would be much appreciated :thumb:
Ok not an expert like some of these guys but...I know white smoke means blow by. That means there is a malfunction in the engine or the carb is putting in way too much ..or you have weak rings on your pistons and oil is being burnt with your gas. And there is no way to tell you have that issue by taking apart the carbs generally. Carbs are before the issue you are having. I would do a compression check, check the valves for clearence and go from there. It sounds like you have three choices..either your rings are gone or you have a stuck valve or your carbs are putting in so much gas it is causing the white smoke. All are bad.