after all the trouble i had with the 34mm carb,
i gave up & put the standard one back on.
started first time, so i know the batterys ok.
bike ran idling for a while,
but while i nipped indoors for lid, so i could take it for a test run,
it conked out!
now it wont start again!
took carb bowl off, full of petrol!
floats look ok.
emptied carb,cleaned it & put it back on.
but bike still wont start!
ruled out obvious,
petrol in tank,