Originally Posted by 1 lunger
Even with the power up these bikes run a bit lean. Add a pipe and pre filter air box mod and its even leaner. The tuner will allow you to ad fuel all through out the rpm range or if you're low on fuel and miles from gas, you could lean it out. You'll get a better throttle response, more power and cooler motor. Call JD jetting and they'll explain it very well.
Mine is definitly not running too lean. I was thinking about getting a tuner so I could lean it out a bit. Its close, but just a tad on the rich side.
I'm wondering if the settings can be a bit random, even after the power up, from bike to bike depending on how there were set at the factory? Another good reason to get a tuner.