I'm fitting a speeduino ECU on the k11 facelift 1.3 dizzy, and I need to know if the IACV valve is PWM controlled or if it's a stepper motor
The heynes manual shows 2 coils (or at least they look like coils), so they would be a stepper, but they have different naming...
One is IACV FICD...
Actually the book "Four stroke performance tuning" by Graham is way more straightforward and gives more info then that link does
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Normally longer trumpets will favor lower rpm, but that's relative to engine it self.
I would point to 350mm from the valve face, up to the trumpet outter face.
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