Just ordered my uni from Dennis Kirk for $20. I can't believe how dirty the prefilter and main filter get. It is pretty dusty riding the edges of the fields around here though. Live in the coal region of Pennsylvania so I can't wait to see what the uni get like when I hit the trails here. Hopefully filter being plugged is why I was very sluggish and slow last night on my rip around on the back roads around the house. Only could get goin 49-50mph. I know the 800 was faster than that when I got it. I did seem like I was goin faster so maybe there is an issue with my speedo.