tzr-r 125 running rich

[davey]

hi all, my tzr r is running rich ive adjusted the screw on the carb and put in a new air filter, but the plug tells me its still running rich, it also miss fires badly from around 8000 rpm upwards in the higher gears, i cant seem to find any settings or data on this bike anywhere. its a 94 belgrada 4fl.(french model as ilive here)
any help or advice would be great.
thanks ,just to add that the carb has been rebuilt but it was by a french bike shop and it was ultrsound cleanedat the same time .

Dave

[carlos]

probably needs a smaller main jet mate if the plug is black especially if it's at the top of the rev range!

Someone may have put a bigger jet in due to it running badly due to dirt and the ultrasound has removed all the dirt and make it run rich

[davey]

ok mate thanks i will try , u dont happen to know what size jet is standard do u ,, as u can tell i have absolutly no experiance with these bikes , if were a porper lc i would have no probs

cheers a lot

[Norbo]

bim meens moveing the clip up to lower the needle to weeken the mixture.

[davey]

better late than never
thanks for the advice guys , turned out that the french are c**ks ,, it was way overjetted ended up doing it my self a 210 main now will pull 11 grand in top