Dieco I just dont understand why that bean cut reed valve lost power. In my tests it just didnt matter what reed it had it came out the same. the only thing i can figure is witht he bean cut shape it just dosent seal as well as the full reed as the reed stop cant keep it contured and sealed to the base. I dont know this for sure as i cant see your parts. Try the waiste cut shape and see what your get there. could be interesting. I cant belive that newer style head and cylinder runs that good. I would like to see the combustion chamber of that cylinder. I think your gone asee a big power increase with that new bigger carb. at least 300 rpm in my opinion.

I worked on changing my port timming to 150 degrees today. I will run that test when I get a chance. From there I will work on case stuffing. sure wish that darn comp ignition would get here.