My recently rebuilt (not by me) K2 motor gets very smokey from #4 exhaust when hot. Doesn't smell totally oily, but more like a rich mixture smell but with a fine blue smoke. My thoughts were if it is mixture smoke it would be black?
Fine on start up, and warm up, but after a couple of miles it smokes like hell (under power and at idle). Checked all plugs (put a new set in to test), and #4 very carboned and a bit wet (after about 1 mile!), #3 a bit the same but not as bad, and the other 2 ok.
Have had suggestions from valve guides to rings, as well as carbie set up. Any thoughts?