hi, i hav a Zocchi pipe on my b1r 50cc i was racing round cheedar last nite without a prob it was going really well, i even got gettin ur knee down sussed, i come in to the pit after bout 20 min riding went to go bck out and my bike would start and tick over but soon as you touched the accelerator it died, after looking thru every thing i couldnt find a fault, jus by chance i took the bottom pipe to the exhaust and it started first time, ( but bloody loud) put it back together and it worked spot on, but after coming in again a short time later the same happend again, so i repeted and it worked, so i had to do tht all nite, does any body hav any idea wot this could be as im very confussed bout it,
thank you,
soz bit long