

Troy in Ohio
I was having a rather annoying and difficult time trying to get my 300 jetting properly. I finally got tired of trying all of the stock needles and decided to try JD jetting. I ended up going with the suggested settings for my altitude and temperature just to get a baseline jetting and found this to be PERFECT. The multi-tapered needles provided by JD really do make a HUGE difference in power delivery and overall smoothness of the powerband. Previously I was unable to get that slight rich "crackle" out of the pilot/needle in the lower powerband, and found that the Red needle (leaner up to 1/4 throttle) was exactly what my 300 needed. The bike absolutely runs perfect now. It is quite amazing at the testing and research that went into making these needles. I emailed JD for a question on temperature ratings vs blue/red needles and they replied back the same day (within 2 hours on sunday!) and advised me of the best options. Great product!
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