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  1. A few questions about modding a 250x

    Performance Modifications
    i have an 87 250x with a DG exhaust on it, the pipe was there when i bought the quad so i have no idea what jets are in it but its dialed in very well, i was considering a new UNI air filter... if i put this on with airbox lid vents will i need to do some carb work? also i was wondering about...
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