Putting a pipe on my bike, jet it?

[crd00]

I'm going to order a cobra exhaust(slip it on over the stock header pipe) for my 250sx and I was wondering if I would have to jet the carb? I have been told so many different things I don't know what to believe so maybe you guys can help me out.

[Rex Karz]

Of course! Start with 2 jet sizes.

[chirochris]

i have a cobra slip on no sparky you can have...

[the great gazoo]

Chris, I've heard bad stuff about the quality of Cobra exhausts for quads, but have seen many on Ebay trikes for sale. Re-jetting usually goes hand in hand w/ aftermarket pipes. Someone correct me if I'm wrong, but if you get popping on decell in gear, then you're running rich. Plus, you're elevation factors in as well, if I were you, I'd hold out for a Supertrapp on Ebay(requires re-jetting), or maybe ST still makes one for the SX? Check their site, Br!an................

[crackshot]

I would see what the plug looks like first. On my 200s, it was always rich.
Put the bassani on there and took airbox lid off and leaned it out perfect.