My Longjia 50 has no power when I accelorate . I can only get 15 to 20 mph at best. Does anyone know the reason for this or know anyone who would look at it for me ( in the Southampton area ), Unfortunately all the workshops that I have gone to wont touch it with a bargepole

Jordan, August 2013

Hi,

If this bike is a 2 stroke (as I suspect) then you need to ensure the exhaust is clean (internally) and also that your plug is in good condition.
Remove the exhaust baffle and clean in caustic soda or oven cleaner. If the baffle is excessively dirty it can indicate over oiling from the oil pump or a rich mixture. You may also have to remove the exhaust and run cleaning solution down the whole system if it is very dirty.
A 2 stroke needs to breath and the exhaust is a critical part of the system.

westcountry, October 2013