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When to re-jet?

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Hey when should you normally re-jet your bike? I have an 06 rmz 250 and i was wondering if i should do it after performance upgrades or just after so many hours of riding. feedback is greatly appreciated. thanks.

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Generally speaking re-jetting is done after mods are made. For example, after market exhaust or opening up an air box. Other good reasons are altitude change and engine mods.

You shouldn't have to re-jet just because of mileage, unless of course the jetting didn't match your configuration or altitude to start with. For example some bikes are slightly lean from the factory because of emission regulations, which is probably not your case.

If your curious how your current jetting matches your set-up? Just have a look at your plug color. If your not having any performance problems and you plug color is okay (pictures of this can easily be found on the net) then leave it alone.

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