Wayne Humphreys

Thanks for all the advise guys, finally realised what the problem was and feel a complete prat, For some reason I convinced myself that the choke lever was off in the top position and kept trying to jet based on that, spent the best part of $100 in new parts too! I'm 41, an engineer by trade and have had bikes since I was 10. The bike was bought as a stolen/recovered and just looked for a problem where there wasn't one. Mental block I guess!!!

Sea level and nothing in the carb, have stripped and cleaned at least 5 times in the last week!

2002 xr650r,uncorked,new 68s/175,b53e middle position, will only run on half choke, idles on no choke, engine dies over 1/4 throttle. Someone point me in the right direction!!! Has anyone had a BRP which only runs on half choke? Thanks

Thanks for the input, the needle jet is still there,the correct way up! The plug is sooty, even after dropping the needle to the 1st position. I tried to order a 671 needle set, but they don't even list it in the Honda dealers here in the uk. I think the 641(b53e)is too rich, what do you think? The pilot seems pretty good now, idles well and very snappy up to 1/4 throttle. Would going down on the main (175) make any difference? Cheers for the help

The bike has the standard exhaust, drilled out tip,and standard air filter,definately Euro bike, and no air leak on the intake,squirted WD40 around carb while running,no leaks showing up.Is it likely to be on the needle/needle jet as it seems to be from 1/4-3/4 throttle opening? Where to next?

Has anyone got any ideas where to go next? My BRP will only run on half choke, it has a 68s pilot,175 main, B53e needle set at 4th clip and the float height set at 16mm. Runs great on half choke! idles ok with no choke,...Pilot screw seems to make no difference to engine note when screwed in. Any help appreciated at this point.