wr450 jetting info wanted

[hairball123]

hi there 03 wr450 just put full Akrapovic system on front pipe seams hot as f@#k and if you blip throttle hard from tick over it bogs and stops engine i live in uk so any advice on main jet and such would help ive looked through all the posts and read all the stuff but all i can work out is I'm too lean and need to swap main jet any simple help please

thanks

[Dan_Lorenze]

What elevation are you at?

[hairball123]

hi there not sure but live in the middle of uk leicestershire if this helps

[dman450f]

you are running way to lean man!!

[Matty05]

Way way lean.

I would go 48 pilot, richer on the needle.

Your main might be right but only you can tell.

[hairball123]

ive put 168 main in and 3 turns out on pilot for now seems ok but booked dyno for next week thanks