jetting help

[muddzilla94]

can anybody help me with jetting i have a 04 450r with a full system exhaust and air box lid removed at about about 2500ft above sea level, any help is appreciated thanks.

[Baileygunns]

185 or 190 main and 50 pilot... Middle clip on the needle

[muddzilla94]

thanks man, the stock needle is non adjustable right? so what should i do until i can get a adjustable one?

[Baileygunns]

Deal with it? Not much you can do till you get a good needle... lol

Your pilot jet is idle-1/4 throttle
Your needle is 1/4-3/4 throttle
Your main jet is 3/4-full throttle

But..... They all effect each other. You might have a bit of a bog in your mid throttle with the stock needle from running a little lean.

Start with the 185 main first... I run a 190 but I'm at sea level.

[mx Eli]

I have a 172 with a hmf system no sparky and a k&n with a hrc lid. also have a hrc cam

[Baileygunns]

Is it a Dyno jet you have in there?

I have a Sparks exhaust, K&N filter, HRC lid, HRC cam, HRC needle and I'm running a 190 main and a 50 pilot... Kiehin jets, not Dyno Jets...

[mx Eli]

no I have Kiehin jets but I think I need a hrc needle because it pops a little on deceleration