yeah done most of the obvious stuff, trimmed leads, checked caps, replaced plugs, carbs are mint, clean as a whistle
its only happens after 10 mins of riding which is the bit which is different to most other peoples problems
it will be fine for 10-15 mins, and the start missing down low but be fine on powerband, and as you keep going, obviously bike getting hotter it gets worst, until itll only run on 1 cylinder almost all the time
so im thinking that spark is not string enough to fire both cylinders as it gets hotter, which makes me think low speed coil?
however most of the time it will idle ok?
one occurence happened where its mainly the right side that wont run, but i watched it swap sides to the left, and fire the left at idle for a while and then it swapped back to the left
so its as if theres not enough to fire both cylinders at once when its hot? plug wire swapping seems to make no difference