front sprocket nut + SERVICE NOTE 2005-12A

[Val]

the nut has never been replaced, nor has the chain, hence the reason I'm going to do the lot, I'm just using as is, as if it's not moved by now, will it move? That's just my reasoning, I would rather wait till bike is off road fir the winter and do all my stuff then as it's easier to do and I don't lose riding time

It will move. Just  use long enough steel breaker bar. I've used steel this steel pipe from B&Q:

http://www.diy.com/departments/ffa-concept-steel-round-tube-w30mm-l1m/254227_BQ.prd