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2005 yz 125 sounds louder and bogs on low end

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I was riding my 2005 yz 125 the other day and a parked it for about a half hour. When I got back on it had no bottom end power and sounded a lot louder than usual. I got home repacked the muffler, changed the reeds, cleaned the carb, and still have the same problem. It bogs until it hits the power band. At idle up to about 1/4 throttle it sounds loud and "tiny" almost like the pipe is loose. But it is not. Could the power valve be stuck open? I haven't had a chance to look at the power valve yet

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Found it.. the linkage broke. I called my local yamaha deeler and he kept trying to sell me something to do with the shift fork.. And had no clue what the power valve was.. does anyone know the part number?...

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