old fart
XS400 Member
Hi all, New to board. Been lurking for months. This retired professor could use some help. My rebuilt 1981 Special has been fitted with brand new Mikuni VM26-8074 carbs on Mikuni VM 28-200 intake manifolds fitted with UNI UP 4182 foam filters (Speed Moto kit). Starts and idles fine. Air screw and idle screw set at 2 full turns out from seated. Problem: engine will not rev. It smells rich. It has a manual petcock, dual fuel lines with filters, valves are set correctly. Anyone have any experience with these carbs or the Speed Moto kit?
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