another jetting question

[Honda_7x]

hey my bro just got a hmf sport serious slip on for his 400ex and i was wondering what jets to stick in it to make it run at its best he'll pry go with the uni foam filter aswell were at about 2100 ft here in nebraska

thanks guys

[Eviltanker]

You might want to start at 158 and 40, 2 1/4 turns out on the pilot screw. Run a plug chop (real one) and go from there. I have close to the same set up but I have a K&N w/outerwears, and I'm only about 500 ft.

[Honda#4]

A 158 main might be a tad rich try a 155 main first with a 42 pilot and 2 1/2 turns out on the screw.

[Eviltanker]

Good call I will agree 155 is a better start point.

[Honda#4]

If you had a full system then you would go with a 158. I go by this jetting setup

slip-on with lid 152 main
slip-on w/o lid 155 main

[Honda_7x]

thats awsome guys thanks alot so the stock pilot jet will be alright?

[Honda#4]

I would put in a 42 pilot just because it starts alot better than stock.

[ohsobad_chevy]

Originally posted by Honda#4
I would put in a 42 pilot just because it starts alot better than stock.

Definately. :cool: