Altitude issues with quad

[Mezzy]

My 2005 Kawasaki banshee runs great, perfect at sea level and starts right up has a great idle perfect performance till I get up to 4000 feet and struggles to start won’t run hardly at all till warm. Anything I can do to the carburetor in a quick type adjustment? 

[davefrombc]

Try  leaning out the idle  mixture a bit .. Turn  the air screw in   1/4 turn  at a time  and  try  accelerating. If it stumbles on acceleration , back the screw out again  1 /8 turn at a time until  both idle and acceleration are good. That should also  help the start.  For regular  use above 4,000 ft.  you may need to rejet  the carb to a smaller jet size.

[Mezzy]

Thanks davefrombc