So I can't figure this one out, I've had the engine apart so many times and thought I'd finally have it done, this last time is was because my timing chain slipped and smashed my intake valves, so I replaced the valves, timing chain and tensioner The bent valves came out of the head very easily, my spare valves I had to hammer out of my extra head? But looked fine, putting them back in my other head, they wouldn't just slide in, I had to smash them with my palm to go in, but once in they would slide up and down freely, so something odd with the top of both valves.. I didn't replace the valve seals because they were done about 2300 miles ago The jug and piston rings were replaced about 100 miles ago and I've been taking it easy to brake them in My bike backfires pretty nice on decel, so I would think its lean, but my plug is back The problem is this, when I start the bike, no smoke, if I rev it quickly it will puff some blue smoke while it winds down, and when I first ride it it'll smoke a little but when its warm it won't smoke So I would think valve seals, the weird part is it will randomly blow blue smoke like crazy when its warm, not constantly its only happened twice now since the final reassembly, the first time it was after I tried a small clutch wheelie in first gear, then it started smoking like a 2 stroke, but still seemed to run fine, I wouldn't push it This last time just now, I readjusted my valve clearances, and it seems to run leaner, pops more and louder, but plug is still black? Anyways stopped at store for 10 min, since its like 50 degrees F I started it with choke again, and when I took the choke off, is about the time I noticed it start smoking like a 2 stroke again.. I'm trying to give as much detail as possible, also the head gasket was reused, just copper coated it first, since my head gasket I ordered still hasn't gotten here.. I'm thinking the first thing I do is replace the new valve seals? I just don't know..