Hello, New to the forum so here goes. I recently bought a used 2000 XR650R with 10,000kms on the clock. It has an fmf powerbomb header pipe, aftermarket pipe (BILL'S PIPES) and the last owner told me he had the jetting 'done' to suit these mods. I bought the bike knowing that fuel would piss out of the overflow tube on the carb when you turned the petcock on. I could not get the bike to fire at all. I've taken the carb off and cleaned it out with carb cleaner (I haven't taken the jets out just sprayed into them and it shot out of the holes near the choke flap) and reset the float to about 18mm. Put the bike back together, 2nd kick bang she fired right up ran for about 5 seconds then died. Another kick and it fired then I put it to half choke but I had to keep blipping the throttle to get it to run. It is also popping a fair bit and will not idle. Is it possible that I have done something with the float to mess with the idle or is it more likely a blocked jet and its leaning out causing the popping?? Also the jet in the centre of the float bowl has a circular shroud around it. is that normal? Im a real noob with bikes and this is the first time ive taken one apart so any help or photos would be great.