over the past few months iv been building a pit bike. the engine is a 125cc air cooled lifan copy (you can't tell the difference apart from the name) everything works apart from the gears it either doesn't change gear or jumps through gears. when i got the engine i noticed the gear leaver was all mangled up so im thinkin its a bent gear changer shaft. as iv never worked on a engine like this was wonderin if anyone has any other ideas or guidance as i dnt really wanna start takin the engine to pieces if i can help it.
thanks
thanks