WHAT IS A DYNO TUNE OR DYNOJET
The quick explanation to this question is that it is a very precise, computerized tune up that is performed to your ride. The first reason you would dyno tune or dynojet (dyno tune for EFI and dynojet for carb. systems) is if your ride isn't working properly, whether it be that it rides rough if it doesn't sound right or even poor gas mileage. This thing will diagnose the problem a trouble shooter if you will. The next reason and probably the one we care about the most is for higher performance. Once you make all of your modifications (breathers, exhaust systems, race tuners ect.) then you get your bike dyno tuned and what this will do is optimize performance. The improvements should be maximum output with the best gas mileage possible. As for the process it takes anywhere from 6 to 7 hours providing that your bike has no existing problems. For more on the process here's a link:
http://thedynoshop.com/pages/whatisDT.htm for a more elaborate explanation here's another link:
http://www.latus-hd.com/service-dept/dyno-tuning.html I hope this answers any questions you might of had regarding this topic. It really helped me better understand what this is and how it will improve my ride.