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  1. 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...
  2. Yamaha YFZ450/450R (2004-Present)
    Ok im putting new rings on my piston. Since i have the top end apart i was thinking of doing the cam mod. Should I do the cam mod? if i do the cam mod will i need to do some carb work? If i did carb work what should i do b/c i have a trinity drag pipe and i was thinking about taking the airbox...
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