Need to determine whether it is richening or leaning in a wheelie (try wheelie with the petcock closed and see if it gets better or worse as the carb bowl empties.) If it gets better, lower the float bowl level... if it gets worse, raise the level.
'01 660 Raptor, Burgard +2+1 arms, YFZ Shocks, LSR anti-vibe, CTR pipe, jetted, K&N
'01 Polaris Scrambler 400, K&N
'02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe
'04 Suzuki LTZ400
'16 RZR XP4 1000 Turbo