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R1ck
Sun Feb 09, 2014 1:15 am
90 MC21 Power Valve issue

I am trying to figure out if my power valve servo motor or pgm is faulty.

When the bike is at idle and I blip the throat the power valves go wide open. I also have very little bottom end.

Any info would be appreciated

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TuckerBag
Sun Feb 09, 2014 2:23 am


That actually sounds pretty normal to me.
I think the power valves open briefly at 3000rpm.

I strongly suggest having a read about the powervalves in the tuning section:
http://www.nsr-world.com/tuning/250-tuning/engine

also, just search the forums and read up about power valve stuff in general:
http://www.nsr250.net/forums/viewtopic.php?p=90986#90986
http://www.nsr250.net/forums/viewtopic.php?t=4405
