So a few weeks ago I purchased a 1983 NH 650 to restore. It has 17k miles and hadn't been started for years. I installed new battery and rebuilt the carbs. The compression with cold engine was 130 PSI for all cylinders with throttle closed (forgot to hold it open). At first it started up and ran fine. Now it's blowing blue smoke out exhaust. Rechecked compression with warm engine and open throttle and all cylinders at 120 PSI except number 2 at 100 PSI. Can anyone office advice on where I should go from here? I figure the top end is toast and needs an expensive rebuild with new pistons and rings if not more. Oh and I've never ridden it. All this is with the bike sitting on the center stand.
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