right it was the head gasket its sort of sorted i wrode it yesterday and had a go tonight and she seemed a bit sluggish on pull away (on a hill) so me being unsure if it was me ,my mate had a go hes more of an experianced rider than me but still the same she back fired slightly and splutered a bit started her again and she went what do you reckon the problem might be mate
............she s good fun though mate

J P, November 2006

hello there..
i have a vivacity 100cc scooter,it was running fine, untill it cut out and it wont start again, should i change the spark plug, and try again, there is spark coming from the spark plug, hot to you check, if there is any petrol going trought...
many thanks

sergio fernandes, November 2006

if the bike misfires when its trying to start then it means its not transferring properly which is due to low compression,have you checked the powervalves are working and the pulley moves when you rev it up?usually the reason they are sluggish to pull away is low compression or the powervalve being stuck in the fully open position,does it go ok when it is revved right up?i expect it does and then would say that it is definately low on compression for sure i bet the powervalves have attacked the front of the piston and scored it all up this is what normally happens im afraid like i said when you first said you got it jp,you will be able to take the exhaust off and look up the exhaust port with a torch and see the marks on the piston if it has been touching the powervalves ok.cya m8

adam bike doctor, November 2006