Quote Originally Posted by mad_max View Post
Its a mates bike and seems to be over oiling, just want to mix some up and see if thats the problem
Just want to try it. Could over oiling be a reason for it to be fouling plugs? Within a few rides?
I can probably find you a copy of the service manuals for the NSR in English, and with that you should be able to check the pump adjustment pretty easily.

Most likely she's just worn out. But that's not such a bad thing... rings and pistons are cheap and easy to fit (use OEM gear, not Chinese knock off rubbish)... at least it hasn't been neglected so far as to die.

Start with the simple stuff... two strokes like to have all of their adjustments correct (ok, all bikes do, but four strokes are happier to run like neglected dogs).