This (81 special) has been my daily rider for about 4 years now. Never had any issues with reliability, or smoke coming from the exhaust before. Only reason I did the rebuild was the plastic pieces from the front cam chain guide getting into the bottom of the engine. Had to replace that, so I replaced the rings even though they were still within spec, replaced the valve guide seals and lapped the valves, new cam chain, and new gaskets. I put yamabond on top and bottom of the head gasket, and torqued everything to specs. After starting for the first time I am getting white smoke from the exhaust on both sides, but more on the left and especially when you rev it. Thought maybe it would go away after it warmed up, but no. Cam chain and valves clearances are all right on. I didn't do anything different with the carbs because they were working great before. I retorqued the 8 big ones on top from 25 to 30 thinking that may help, but to no avail. I am willing to take it apart again and replace the valves, guides, and seals again if I have to, but I don't want to just start replacing things if they don't need to be. They seemed fine before. If something is not right with the valve guide seals,even though they are brand new, would I be ok just replacing the ones on the exhaust side and leave the intake ones alone?