Thanks again,too be honest the way it stopped yesterday I thought it had burned a piston untill it pickup and fired every other lampost,when I let it settle down and pull it's self together it regained it's composure so to speak.

I've experience this on an Africa twin with a K+N and an open pipe,but nowhere near as bad as this.

The original cover is already back on and plug doesn't look to bad when I took it out and checked when I got back but I haven't ridden the bike with the stock cover back on the weather is crap,but what I'm intrigued about is the fresh tank of fuel,yea sure I'm aware that modern day unleaded goes off pretty dam quick,but surely gone off fuel isn't going to effect it that much,or is the XT less cooking engine than I thought!!!

I had originally thought about fresh fuel and try again,for no other reason I've never known a bike react so badly to just an aftermarket filter,and thats a lot of bikes!!!.