i own a derbi senda on a 54 plate and it started to leak but i tightened all the bolts and put a piece of paper towel under it to check if it was still leak leaking waited for half an hour and the towell was still dry so i thought i'd fixed it but i came back to it today and there is a considerable amount on the towel and i've had to cancel my mot that was booked for tomorow can anybody help me out i've checked everything and it seems to be coming from the casing next to the back brake lever and collecting on the sump plug before making a mess

josh, May 2008

Not sure if this is relevant but my derbi was leeking petrol from the plug on the tank where the fuel sensor is, i used a water proof sealer and it has been fine since, im sorry if this doesn't help but thats the only leekage problem i've had.

Steve, July 2008