Hello all,
I've had some very strange problems with my 94 NSR 125RR. I was just riding home from a friend's house, and I hadn't got too far when the engine spluttered and died. I pushed it back to his, and the next day investigated a little bit. I eventually traced the problem to the spark plug. I found a motorbike shop, and got another one the same ( an -ES). Started up the bike & it runs. Seemed fine until i tried to ride it, but now every time I open the throttle, the engine dies, but at tickover the revs keep increasing at an alarming rate, as if I had the throttle slightly open. Then the strangest part, it won't turn off! the only way to stop it is to stall it. When you turn off the key, the revcounter turns off but the engine keeps going.