how to change the mixture of petrol and air?

lol aaron the bike is running too weak if it does that so at least i know that now,right the thing to do is take the slide out from the top of the carburettor it will be held in by a small screw or two then you will pull out a slide shaped like a small toilet roll and there is a small needle in the centre of it,pull the spring up as far as you can out of the slide and slip the cable out from where it fits in the slide so you now have the slide in your hand.pull the pin out and you will see a small circlip on the pin now move the circlip by pushing it out from the groove and move it to the groove nearest the sharp end of the needle,ok now put it back together and it will run better but i would suggest a bigger main jet for a more sucessful job make sure the slide is in the right way when you fit it back into the carb there is along groove and a short groove the short one goes on the side where the tickover screw is .ok what cc is the big bore kit you have fitted and what exhaust have you got and ill try to work out what main jet size you need,but try the slide trick first and see how it goes ok.

adam bike doctor
January 2007