well I did my shims a while ago - and also overhauled the carbs (new tubes and seals) but then had a period of ill health - and also had some other bits and pieces to do (new front disc, tyre and wheel bearings) - so its only been the last couple of weekends i have been trying to get it up and running
it is very reluctant to start (spark fine, plenty fuel getting through) tries to fire up and catches a couple of times but just wnot pick up - got it running eventually last week and after a while did even out and sounded not too bad. - but this week - pops and bangs and flames up carb inlets - catches bu would not pick up
but i have a nagging suspicion that the timing may be one tooth out - i used to have a XS250 that would not start when warm and it was a valve timing issue - so if one tooth out one way makes it hard to start when warm, ....................
any thoughts before i take cam cover off again?
cheers