G'78 GS 670E puffing white smoke cyl,1&2

[moto65lee]

Hi everyone, this bike has been sitting for a couple years. It still cranks over but the compression on cylinders 1 @ 2 have always been low and when it runs I get white smoke out of the left exhaust pipe. Could this be a stuck ring. Anyone ever heard of putting some tranny fluid in the oil, cylinder, or gas to loosen a ring up or does it just take time for the rust on the ring to reseat itself. Gosh , dont want to get a ticket for excess oil burning. Any ideas? Right side exhaust pipe no smoke. Thanks Ray

 

[Nessism]

Marvel Mystery Oil is good stuff for freeing up carbon stuck rings. Worth a try but if as you say, the compression has always been low, I doubt it will help.

BTW, have you checked the valve clearance lately? That might be part of the compression problem, but is unrelated to the oil burning.

 

[Guest]

Is there something in the right side exhaust pipes, I had a 750 a couple yrs ago,It had been sitting about 10 yrs when I got it, I went through the carbs and adjusted the valves, went over every thing on the bike. Started it up ran great but was blowing white smoke out of the exhaust. I played with the carbs and did a compression ck,a little low but except able, could not figure out why it was blowing smoke, so I pulled the mufflers off and just left the head pipes started it up no more smoke, my guess is that the carbs had flooded over or something and filled the exhaust with old fuel at some point or a mouse house or something. Put exhaust back on and just kept running it and after about 100-150 miles the smoke went away.