mikuni vm20 help

[izaacz21]

Hi I'm running this carb and have horrible bog in second gear on the low end.it runs great in first gearAnd shifts great in to second at high rpm but if I let off the power band and low rpm in second gear it barely wants to put. Jetting specs are 17.5 pilot 140 main needle on second clip from the bottom and air screw 1.5 turns out. Any help would be greatly appreciated.

 

[izaacz21]

Oh yeah engine is a crf50 with tb 88 kit race head and race cam. Elevation is sea level

 

[my67xr]

hi,
welcome to miniriders.

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what is the carby off ?
the Main jetting sounds pretty big