Hi again. Nope won't change either whether using clutch or not. Seems i can press as hard as i like on the shifter and it won't budge.

I've changed the oil now and for a while i thought it was sorted as it seemed to have stopped but after about 45 mins it came back again.

Bit of a pain as i bought the bike to practice on before my test! Do they test your ability to cope with mechanical malfunctions?