Now that I have fixed the crankpin and found the chipped ball in the front bearing, I removed the bad bearing from the case. I had another case with good bearings that was unconverted, so I pulled one of those bearings and replaced my bad one. I reassembled the case, sealing it up with Yamabond (permatex ultimate grey sealer) and now the engine runs like new without any clicking and great compression.

I have a H9 80" cub I will put it on. The Nosen Citabria would have been too heavy for it at 14 lbs.
The ignition, battery, and home made muffler only added about 4 ounces to the total weight brining it to 2.5 lbs ready to run. Using the original WA-46 small bore carb. Tried larger carbs but they only made it run rich at top end and no improvement. This was a very rewarding project to say the least!

John