I don't think you'll find the NSR power jets work the same way as bikes like the RS and TZ, where they can be cut off or triggered at certain RPM.
What I can tell you however is that while setting up StephenRC45's MC18/300, different size power jets had a huge effect on the way the motor performed (or didn't perform) whilst trying to get the top-end jetting correct.
I will admit though, we are still not entirely sure exactly how and when things are happening regarding the power jets and solenoids, which is one reason why we have booked the dyno for a day in a few weeks time.
_________________
Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
Check us out on Facebook! Please "like" our page!