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Message: [QUOTE="03YZ85Rider, post: 760575, member: 45231"] I don't think any aftermarket pipe will noticably increase low-end power on the YZ85. I have a Pro Circuit platinum and it actually has less low-end power now then it did with the stock pipe, and yes it is jetted properly. I would spend my money on Eric Gorr's low to midrange porting if I were you, it's half the price of a new pipe and probably twice as effective. Keep an eye on the silencer packing, mine likes new stuff every 2 or 3 weeks or it runs terrible at low RPMs. You might want to experiment with larger rear sprockets, maybe a tooth or two bigger. With the stock 14/47 gearing you really have to slip the clutch or shift like a madman to keep the bike in the power. You could try a shorty silencer too but I don't know if there are any real power gains to be had there either. Hopefully someone that has tried one will chime in. I hope this helps some. [/QUOTE]