do you have to re-jet with after market pipe.

[honda 400ex 69]

i was looking into getting the pro circuit t-4 pipe but was wondering if i had to re-jet for the pipe to work right?


if u have ne pics of the t-4 pipe on the 400ex please post.

[Pro400EXC]

Yea,you NEED to re-jet,it will get more power outta the pipe,and make it run right. I put a 155 main in mine (148 stock), and already felt a difference. I also put some hoels in my airbox lid, it still runs a lil rich,so i need to play woth it more.

When i had the stock jet in there,it popped when i let off the throttle,and smelled like she was runnin hot.

You'll love the T-4,i have a pic for you. also,since your in Ohio,try maybe a 158main,and play with the Needle and all.

[honda 400ex 69]

could i just get a jet kit and install that or should i just buy the main jet?

[honda 400ex 69]

that pipe looks sweet on your 400. what happen to the sticker on the pipe?

[Pro400EXC]

Well just a mian jet is cheaper(only $5), but do what you wish.

ITs not a sticker,iyts painted on,and well,i tried polishing it when it was warm,and it rubbed it off. ohh well,i am gonna make it a shorty soon anyways.

[Wheelie]

Don't buy the jet kit, go to your local dealer and buy the jets.....save yourself the $$.

Open up the airbox and use a #152 or #155 main jet.

[honda 400ex 69]

arent jet kits really good. and dont they do a lot. it says 15% on hp/throttle response and tourqe

[TDBRPH]

Jet kit = Waste of Money !!!!!!
Like the others said save the money and just buy some main jets and consider bumping up the pilot while you are in there !!

later
Triston

[kid300ex]

my t-4 did the same with the sticker, when i rebuild mine im just gonna remove the plate and put rivits back in the holes

[Leo]

I never had a problem with the label on my T-4 although I don't think it would stand up to a pressure washer very long :D

Don't waste your money on a jet kit..

just grab a couple main jets, and a pilot, and away you go ;)

Leo

[yellowrider]

the one i siad cracked his frame in 4 placees or alot i dont know for sure i now it was like 4 anways he has a t4 and it did the same darn thing...... but he loved it

[Teufel]

go to the shop and buy singles, also you will need to change the pilot. Read the jetting article on this site it will help you.

[Blake24]

is it smart to get a new needle at the same time???

[Wheelie]

IMO--It's not necessary to buy a new needle, the stock one should work fine, it might need reset (raised or lowered) but not replaced.