Good news
I got my roid running this arvo
I removed the COV plug ,I discovered that the plug has a hemisphere machined on the end . Anyway , I tried starting the roid with the plug in different positions eg screwed out . It began to make smoke a bit, I was getting closer .. I screwed the plug almost all the way in, about 4 turns from the full .
I really swung the flywheels over faster than before ..... and I kept swinging on the crank handle as I let the decompressor go , it suddenly burst into life with black smoke and a chug chug . The problem is the crank handle got stuck on the crankshaft , it was swinging around wildly in a dangerous whirling fashion, I jumped out of the way as the roid was running . I managed to reach over and swing up the cut off lever - whew !
For the short time it was running ,about 60 seconds , it is very smooth and balanced even with the crank handle swinging around , no jumping or walking . thanks to 38ac's balancing method
re: adding weights brake drume , sounds like a good idea