2001 rmk 800 jetting (with a Attack air box)

[JDmotorhead]

A friend of mind installed a attack air box on his rmk 800 and we are wondering what jetting he should go with down in the Valemount area. The box came with 430 and he installed a 390 he thinks which was good for the Fort Mcmurray area. Will this be good for Valemount. Thanks for the help!

 

[f650]

my 2001 800 rmk air box is gone installed air pods and slp twin pipes i run 430 440 at valemont i also run egt sensors i hit 1270 to1300 on gauge
need to be careful on trail egs creep up a bit and coolant temps need to burp the throttle a lot watch the mids