Haven't tried a BM one, but my Brother had a D&D in a 98 ZR 600. I have to tell you that the change was not that much. The gearing and clutching made more of a difference. I personally wouldn't waste the money on a chip. Get some Heelclickers and you'll be happy and much more reliable.
Bart, I also have a 2000 ZR 600 EFI. I installed a Black Magic Hot Rod Trail Chip last year. I am very pleased with the results. The sled performs better and the mileage increased about 1-2 mpg. It was very easy to install too. I think it was worth the money.
Bart, Yes, I am running stock clutching. The peak rpm came up just a little, still right in the peak HP range. The AC twins have a habit of eating up the cam arm bushings fairly quickly. If you let them go too long, other clutch parts will start to wear. Make sure everything in the drive clutch is in good shape for optimum performance. Good luck, and GO GREEN!!
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