Guys,

Here is a follow up on this problem.

After fiddling with it more than I wanted to, I decided to start fresh with a whole new ignition system and carburetor.

1. Replaced the hall sensor, and used a brand new Rcexl ignition
2. Made sure everything was sealed up good.
3. Installed the new WT 664A carburetor.

Running it in this configuration yielded no better results so I decided to order a WT 201B carburetor.

Next run.

1. New hall sensor and Rcexl ignition.
2. WT 201B carburetor (Factory Carburetor for this motor).

The engine ran like a champ. I was able to finally put a good tune on it. I wouldn’t think the difference between the WT 664A and WT 201B would have made that much of a difference. I am no carburetor expert, so I can’t claim to know why it worked, but for some reason I could tune the 201B and not the 664A on that engine.

Thanks for all the help.