need some help with my 300ex jetting

[250xsupertrapp]

so my 300 has a powroll 313 kit and a cobra pipe with a k&n filter, so i had my cousins dad put it in and he told me to get a dynojet stage 2 jet kit, so he put it in and told me it ran good, so i ride it and bottom and midrange is good but wont rev for crap, it just falls on its face, idk what to do

[mike maddrell]

install a larger main jet. go up a couple sizes from what its got in it now.

[bwamos]

Aye the Stage2 is for filter pipe on a stock bore. You need a larger main jet. 2-3 sizes most likley.

[250xsupertrapp]

so i would need like a 135 or 138 main, im about 500ft elevation if that helps, alot what about the air fuel mix screw, were should that be

[Sjorge450R]

you have to use dyno jet jets with the needle.It doesntwork right otherwise. WhenI had my 300, I ran a 129 DJ main jet, clip in the middle and air screw at 2.5 out. As for mods. That was a closed box with K&N, Supertrapp IDS-2 full system and a .020 Wiseco 11:1

[250xsupertrapp]

so should i put the stock needle in and just buy a reg 135 or 138 or should i just buy dyno jet jets