Welcome to the forum!
If your airbox is going to remain intact, complete and closed and your exhaust is stock then you only need stock jets, although 25 pilots are always recommended.
If, however, you plan on an aftermarket exhaust or modifying your airbox - remove snorkel, or modify or remove the cover - then you need to increase your jet size and switch to DJ needles...
With more info on your plans we can give you a suggestion on where to start.
'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
Last edited by QuadManiac; 02-08-2019 at 01:51 PM.