You don't need a dyno to tell you the engine is running rough at low rpm... which is generally the most common case when re-jetting is required. My '98 had a dynojet kit and a D&D can, and wasn't jetted properly... the problems I had were rough running at sub-7000 rpm, occasional stalls when not running hard, and a lot of deposit on the tip of the endcan.
Went to smaller needles, and the bike ran like a top, despite the fact that I lost a noticeable amount of peak power because of it.
If in doubt, your dealer's mechanics should be able to assess fairly quickly and reasonably if it's running lean or rich, and can likely change the jetting for you to make sure it's set up right.
"Keep yer feet on the pegs and your right hand cranked."
I know this guy..he came in an ate at my bar a few days ago and saw my bike....
we have exactly the same type bike (color and everything).
Anyway...he does have a full exhaust system and the dealer told him he doesn't need to rejet...which I said sounds crazy. The bike is running extremely lean after a full exhaust is put on and he needs to rejet asap! But I gave him the url to this website so he could ask you guys (who know a heck of a lot more than me).
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