The threads where the spark plug fixed into the cylinder head have become damaged. The spark plug is now screwed in, but cross threaded. That said it appears to be in fairly tight.
Firstly does anyone know if this will affect the performance of the scooter?
The scooter appears to run fine, at top speed but struggles as the revs are building? Could the dodgy spark plug fixing be the cause?
If so can anyone tell me how to change the cylinder head? Does the entire engine have to be removed? Ive tried searching the forum but the search facility doesn't appear to work.