main jet too small

[fishyyy]

yo i have yamaha dt 125 re 06 and my main jet in only 110 i know stock one are 210-240 but if i run somthing like that its too rich. now my yamaha runs good on low rmps (idles good aswell) but if i go in high rmps and hold throttle wide open for more then 30 sec seems bike like dies feels like its too rich but when i pull in cluch the rmps stay high for about 20sec (like its too lean) and then they return to normal, any help what i should do?

[MadGyver]

Maybe it's from the 3ET DT200R,has the same carb as the DT125R but uses different numbering in jets, the main is 150 but is not smaller than the 210 of the DT125R.