Any attempt to bring #1, #2, and #4 down raises the idle. Turning the idle adjustment screw doesnt help (because its controlled by #3) and adjusting the throttle cable only made a slight improvement. The only way to lower the idle is to adjust #3 carb which also lowers the reading on #3. It's a vicious circle. I can synch the carbs at 2000 rpm but then there is no way to bring the idle back down. Is there any logical explanation for this? I tried swapping hoses and nozzles on the carbtune to see if something was wrong with the synchronizer. Thank you for your help.
Can't upload photos. Current readings on my Carbtune are as follows. The manual says to synchronize at 1500 rpm.
#1=28
#2=24
#3=20
#4=28
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