Will modifying the smog junk and jetting on my new XR650L void the warranty?

Also, the dealer told me to run minimum 91 octane fuel and the manual says 86. Which is best?

Ihe warranty depends on the dealer, and whatever you change can be changed back. Run the lower octane fuel - listen for spark knock. The motor will run cooler with the mods you are going to do to it. ------ Great bike, you will love it :)

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