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Thread: dirt bike tuning

  1. 06-15-2009, 10:24 AM #1
    86tecater
    86tecater is offline New to the board Arm chair racerNew to the board
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    dirt bike tuning

    i have a yz 490 that i bored out to a 503, ported, put a new piston and rings in, and i put a new high flow air filter on it. I was wondering how much higher i need to go with the jetting from the stock carb with stock settings. Also is it worth it to just pay 75 to get it done?
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  2. 06-15-2009, 01:22 PM #2
    3some's Avatar
    3some
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    if parts are included and you have no experiance with tuning then yes.
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  3. 06-15-2009, 01:58 PM #3
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    Macs
    Macs is offline Formerly barry_mann Got the holeshot
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    read the jetting 101 guide on here. It is pretty good at walking you through all of the steps. No one can tell you what jet sizes you need because everyone's circumstances are diffrent. Usethe guide and you will never have to pay someone again to rejet your toys, ever. Think about how much you will save.
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  4. 06-15-2009, 02:20 PM #4
    86tecater
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    yeah i have some experience so i will try doing it myself. Thanks everyone
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