Maybe you guys can help me out. I’m running a Moki 1.8 on my H9 Cap also. My question is that I have no destructions for this engine. I have only done the tuning by chance. The problem is that the hub adjustment on the carb is much more critical than the needle valve adjustment. Is this normal? Is there a tuning procedure for this engine?

I have experimented with a few props, but still haven’t found the ideal prop for this engine. What is you’re recommendations for the prop for the Cap?