Power chips

yamaha does an excellent job of maximizing power with out giving up any reliability and getting good fuel mileage.anything out there may or may not get you a minimal gain in horse power wich you would only notice on a dyno or at the track looking at time slips.for the average or even aggresive trail rider theses things are a waste of money in my opinion.
 
it's snake oil

The stuff that really works like PowerCommander 3 with the Ignition module or the RapidBike 3 cost from $700-$1000 USD, you get the picture.
 


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