Not far off idle the RC Valves open to "Hi" or the setting position, then at around 3000rpm they move back to the "Lo" closed position. This is inherited from the MC16 model that had no T.P.S. and therefore no automatic way to set them up without the motor running.

If the idle is set to high, or the mixture isn't quite right, causing the RPM to wander slightly, or the idle RPM is set "just wrong" (i.e. on the edge of the lower set-up limit), then as the RPM increases the Valves will open. As they open, and as there's zero throttle, the motor will stutter very slightly, and the RPM will drop. Consequently, as the RPM drops, the motor falls back into its' comfortable range and settles down. As the RPM settles, the process will begin again.

If your idle is where it should be, i.e. around 1200 RPM, as you blip the throttle the RC Valves will be closed, briefly open, then close again. Once you get the revs up to around 7500 RPM they will re-open fully again.

I hope that explains it all?!
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Andy.
NSR-WORLD.COM

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