Pipe and jet kit?

[397ccEX]

Hey guys I was wonder if I get the Procircuit T4 SLIP ON OR T4 FULL and I buy the jet kit made for the 400ex out of rockymountain would that work with the new pipe?
And I just put a k&n filter on ther is no need to rejet right?

All input would be appreciated
thanks

[wheeltrax]

It is always recommended to rejet when letting more air into the engine or allowing more air to escape. the jet kit would work with both options. If you are spending the money might as well get the full system over the slip on.

[397ccEX]

who else has input
Can i rejet for a new pipe if i get the k&n jetkit made for an 400ex?

[honda_runner]

U have to rejett, no matter if u have a k&n or not. I took off my air-box lid and i went up 2 sizes on the main jett.

[honda_runner]

Oh yeah, and get the full exhaust, slip-on is for ricers.

[397ccEX]

So basically its no use cause im gonna have to get new jets anyway if i get a new pipe right?
So jetkits are for use with out pipes right?