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ThumpingWR400

Yoshimura exhaust upgrade?

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Greetings all,

A noob here looking for some guidance.

I have my first bike 99 wr400f which I am looking to modify. I believe it has a standard header and a yz muffler. I am looking at a Yoshimura Stainless header pipe with titanium rs-3 muffler in the hope that it will be less restrictive and more responsive than the current setup? Also will the carb need tuning / jetting or will I be able to bolt on and ride?

Many thanks,

Simon

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