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  1. New to BlueTraxx - Tuning up a 2008 YZF450

    Yamaha YFZ450/450R (2004-Present)
    Greetings, I just finished checking the valves and replaced the shims. I bought it used and the previous owner had never checked them. Only one intake valve was in spec, the other four were out. Both exhaust were under by .10mm. It was running a bit rough. While I had it tore down I did...