Anyone have any experience with it?I live in the NorthWest and do a lot of high altitude riding.How high?I can't give the exact figure and won't guess but it's high enough to notice a decline in performance.I have ridden at this elevation for years on different machines and have always noticed the decline in performance. I read the review in the Dealer Showcase.Sounds interesting.

2000 450ES Red.

 

I have a Dial-A-Jet installed on my YZ490. As far as high altitude riding, I don't know. I have never been at any level than whatever Michigan is at. It did seem to make the bike run better at certain throole positions where the jetting did not seem quite right before. I still have not gotten the bike fully jetted yet, so I have realized the full potential. It is still too rich, but runs good. I did not lean out the main enough to compensate for the DJ. My bike eats plugs, but does not seem to have any other signs of running too rich. I'm sure that when I get it tuned, it will make quite an improvement. It is also much easier to tune by the seat of the pants when it only takes 30 seconds to adjust. My adjustments just have all been down so far.