Not bad. I have a Sport Rider magazine where they tested a 1999 F4 and got 88.8HP @ 12,500, and 41.6lb/ft @ 10,000. Your CO is too high, should be 4.0 or below. Could be dirty air filter, stuck choke, leaking float needle/seat, etc. Plus the HC is too high. Could just need new spark plugs.
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