No you could be right as I’m starting to think that the smoke smells of oil , I’m not going to run it again for now anyway, stuck rings = knackered bores if I run it . Would it have fired up so quickly with stuck rings though ? I will check if it’s pressuring the crankcase , thing is this engine was always a brilliant starter and runner , its been in 4 different motors now , my dad had it rebuilt with about 180,000 miles on it , it must have done 250,000 by now . I was getting it running to sell it but I’m starting to think I should fix it and put it back into my 110 !