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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Power Jet
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[QUOTE="jsantapau, post: 1360400, member: 99193"] I believe that the power jet closes off when the ignition reaches a certain rpm. at the very top of the rpm ceiling ,when the engine is past its peak power,the power jet closes to lean out the mixture a smidgen to give you an extra bit of over rev. I have heard of some people disconnecting it and tuning the carb in the standard old fashioned way.Not something I would do just because I hate things that aren't the way they are supposed to be Never having to try and tune one myself,my GUESS is that You tune it with the pilot,needle and main like the old style and if you run into problems like bike runs well at extreme rpms but pings right before you hit the usable rpm cieling you would fatten up the powerjet. It would be something that you would tune at extreme high rpm but I doubt that I could tell the difference since I rarely ever really get the throttle pinned all the way open anyway so I would more than likely just tune with the pilot,needle and main and not worry about it. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Power Jet
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