Working on my CZ night before raceday, final touches and its all good - hmmm, wouldn't run properly next day (of course ). I'd forgotten to re-fit the pilot jet....
another meeting
Kick, kick, kick....tried to run but kept dying. Pushing, pushing, pushing. Bugger, ran fine yesterday. No go. Plenty of spark, all the usuals good, bike half stripped in the pits and race coming up....oh, left the exhaust bung in.
. It ran fine once I reassembled it.