Right, in the pic below you can see the powerjet pipes. One part it blocked off, the other is open with nothing attached. I do not have the solenoids plumbed in and cant even see the connector for them!!

I had the carbs off just before I took that pic and removed the screw from the float chamber to reveal the powerjets were 'not' blocked.

So, with this setup, will the powerjets still come into operation and give me the top end fueling I need. The bike runs and rides absolutly fine, but I've not gone over 9k rpm yet as I didn't know what the top end fueling was like. With one of the pipe open to the atmosphere, would this be just like the solenoids being permanatly open and allowing air flow in?

Don't see anything in there mentioning an F3 PGM-II!

The power jets provide fuel depending on the air-flow (or rather depression) across the top of them - fuel is drawn through them. As I see it, the solenoids vary extra airflow (timing) and the X & Y pieces the extra airflow (volume) to the emulsion tubes weakening or richening the mixture as per the program in the PGM unit.

If you have power jets fitted, they will supply fuel regardless of whether the solenoids are connected. What mains do you have fitted? What size are the power jets? How about the size of the slow jets?

I will know a lot more about air solenoid timing after the next dyno session, but only have an MC21 and an MC18 to test. Quite what an F3 PGM is doing at certain RPM is a mystery to me I'm afraid.

Cue Matt...
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Andy.
NSR-WORLD.COM

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