Just installed Pro Circuit T-4

[400exNH]

Well, haven't rode it yet as it's late and it'll wake up my neighborhood, but here is a pic. I love the looks of it. And the sound was mean in my garage. One question for all you owners.

Where the slip-on connects to the header, is there supposed to be a rubber fitting/gasket or something? Because it seems to not have too tight of a fit and I'm thinking air might leek out.
Anyway here is a pic, sorry it's a little dark like I said it's dark out now.

[Stevo]

Hey whats up i just put on a t-4 as well. It is awesome and it improved the power a good bit, but im not sure if i should rejet or not. Anyone know whats a good jetting to use???

Where it connects to the head pipe it should have a rubber o-ring inside the silencer. It doesn't get clamped down like the stock one though, mine seems to be pretty snugg though, i dunno maybe try taking it off and seeing if its missing.

[user101]

the little rubber gasket yall r talking about is in the stock muffler.
take it out and put it in the t-4

[400exNH]

It's stuck in the stock muff, and tips to get it out without destroying it. TIA

[Porkchop]

My cuzin has one on his 400ex with a k and n and I just moved the needle up one and it worked and ran great

[YLW400]

I just put mine on last night too! It does sound good! Are all of you running the spark arrestor in yours? Does it sound differrent without the SA. I am going to try it tonight. I am happy with it though. Do I need to put that rubber ring in the T-4???

[400exNH]

Just went to my local Honda dealer and bought a new muffler gasket because the original one from my stock muff is toast.
Part # 18392-mk4-000

[400exNH]

I'm thinking that this sucker is louder than the Yosh slip on, but you know what, screw it because I'm pissed at New Hampshire anyway for charging me $67 to register my quad. *******s...

looks good.

[yellow400]

Originally posted by 400exNH
Just went to my local Honda dealer and bought a new muffler gasket because the original one from my stock muff is toast.
Part # 18392-mk4-000


DId they just give you an o ring for the muffler right there or did you order it? with my big gun slip on i'm having the problem with it being loose there too. IS that what i should get

[400exNH]

They gave it to me right then and there. They only had one left in stock so I guess I got lucky. You can also find this part on servicehonda.com if you want.

Ref# 8 http://www.servicehonda.com/HARD%20PARTS/atv/trx400ex/muffler.htm

I don't have experience with the big gun so I'm not sure it will work. My guess is that it would.

[honda400zx]

the t-4 already has an oring itf u look into it so u donnt need anything no clamp or nothing:D

[honda 400ex 69]

muffler gasket - what is that i have a t-4 and dont think i did ne thing with the muffler gasket what the he!! is it? thanks for the help

[rdmex]

look at my sig for jetting with the t4

Go to the auto parts store and get some hi-temp gasket sealant. I prefer "the Right Stuff" but get some and put it on your joint connection, wait overnight and you will be leak free. :D