Richard wrote:

Made a first test run with P-Port only. The side port was closed off at the side housing.

Fired up immediately. Idles at 1200RPM. No close up butterfly. Intake control is with carb slide only (38mm Mikuni).

Intake length is 6.5" and is not supposed to be tuned any at this time.

Exhaust is equipped with tangential muffler with no buffles inside. Can be tolerated in the test stand without ear protection.

I am pretty sure that this is the end of the combination port configuration, as far as I am concerned. With 1200RPM idle and 7500RPM max, I have a RPM ratio of 6.25/1 giving a comparable LYC idle
speed of 432RPM, I can't ask for any better.


Richard Sohn
N-2071U
unicorn@gdsys.net

 
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