What Chris is describing is correct for most carburetters ... but not for the Dell'orto that the Mini-Motor uses. In this case it really is a pump, not a tickler; it squirts an extra shot of fuel out of the float chamber and through the jet to aid starting. Despite that difference, what Danny and Chris have said about the float valve being the cause still holds.
Because it forces fuel through the jet, a couple of pushes on the pump is often effective at clearing a blocked jet.
Thanks James. So it was the float (hand drawing as good as i can do), I was able to compare it to another one today (thanks Martin from the Losers Motorcycle club). My float has been damaged with the needle being force down/float forced up by about 6mm. I re-soldered it at the correct height and there is now only fuel leakage at high vibration.
I'm guessing this was normal?
James if I want to get the bike on the road I'm assuming I just fill out:
V355/5 first registration form for the PPL466 number plate, V765 application to register under original number plate form. followed by applying for Tax exemption form.
Looks like I need a letter from a club but EACC isn't mention in the V654/1 info sheet?