2009R rear throttle body soiled, front clean as a whistle. Figured the fog from the oil breather would dump down the front inlet but doesn't appear to be doing so.
I doubt if it its any thing with tight valves. Just checked mine and all were in spec.
Mine does pop some in town. Runs good on the throttle. Will monitor.
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BBF 03-09-13 "It is cool. I was playing dakar racer It truly was a gr8 day of riding you bitch"