i have a wyl carb on my shindaiwa conversion it works great runs perfect all the way through to full throttle. The only problem i had was the return spring on the throttle it was to strong. So i took it out and where the linkage goes to the carb i put a rubberband to hold the tension on the barell. works great though it would be nice if i could get a weaker spring to put in the barell but once i got it out i didnt have much luck getting another one in its place hope this helps