wont run after putting hmf full system on

[xX-Clutch-Xx]

I installed a hmf full system today and it started fine when i rode it to the house but after putting the system on it floods easily and if you wait and try it starts for maybe 2 seconds then makes a loud pop and its done. i dont know if i need to turn the idle up of course im rejetting it but i didnt think the pipes wouldnt let it run at all haha.

[01boneless]

Originally posted by xX-Clutch-Xx
I installed a hmf full system today and it started fine when i rode it to the house but after putting the system on it floods easily and if you wait and try it starts for maybe 2 seconds then makes a loud pop and its done. i dont know if i need to turn the idle up of course im rejetting it but i didnt think the pipes wouldnt let it run at all haha.

youd be supriced what the pipe would make it do without rejeting espicaly since its flodding id say start on jeting the quad and see how it goes but thats just my 0.02 cents :) good luck

[Scro]

If you have to re-jet the carb when you install anything that changes the air/fuel mixture, exhaust included.

[JOHNDOE83]

Yeah, you need a bigger pilot jet and a bigger main jet, might even need to move the needle.

[JOHNDOE83]

How much bigger is the hmf header then the stock EX header?

[BenHonda400ex]

Hmf- 2 Inch
Stock- 1.5 inch