Looks like its top end rebuild time!

[pjm204]

okay, you guys are giving me some good information. The left cylinder is the one with the carb with the vacuum line running to it. My petcock does leak but it looks like it is leaking between the gasket of the petcock and tank (just had tank painted).
The bike was running decently until I messed with the timing:-(, now it is running like garbage. I need to figure out how to set the timing....at least you guys are giving me hope that I may not need to tear the motor down. I'd be very happy if I was just burning excess fuel and not oil.

I think I will also put premium gas in it, right now it has regular in it which runs great in my other GS's but maybe this one needs the extra octane right now.....

Okay so I need to figure out the timing and adjust the carbs properly to the filter foam I am using. Keep the input coming guys, I really want to get this thing running great by the end of the week.

[pjm204]

Okay, so I have pretty much determined that it does not need a rebuild, only 13,xxx on the clock, 120 PSI on the low cylinder (left), about 140 on the higher one(right). Today I took the carbs off, cleaned them, they were pretty clean to start with though. I messed around with the carb sync screw (I know, that was probably dumb)...I am about to go buy some clear tubing to make a manometer. It is now burning clean on the left cylinder(no smoke) where it used to smoke horribly. Now it is smoking a bit out the right side. It does however ride and has much much more power, I think my issues are almost completely carb sync/timing related.

well back to the garage.

[rapidray]

I guarantee the smoke on start up is the valve seals. They get hard with heat & time & stop doing their job. Ray.