Ya, I can help, it would just help more if people would just stop buying discounted s**t that is discounted
because it's s**t from the likes of gasbike and bikeberry.
Your mistake was buying a 4-stroke engine with a long straight shaft and no clutch already on it. The best would be the 49-53cc HS -1G engines with a short shaft with a clutch attached, you can use 4G transfer case on that.
Your delima is how to get a bushing to spin free on the moving engine shaft without bearings while under under belt/chain tension on it.
That bronze bushing your clutch bell ride on is called an Oilite Bushing, soak it in 30W oil overnight, it's the only lube it going to get.
Only adjust it (if you even can) to semi a tight belt, get it too tight and it's a constant angular drag on the bushing.
Don't bother with trying to replace the bushing with bearings, been there done that and it was an expensive fail.
All I can suggest is you soak that bushing, and then pack it with grease when you put it in, and of course, get the right engine next time so you can use the trouble free 4G transfer case ;}
Note, anyone dealing with a big HF or Honda engine is faced with this as well, so it can be done well enough, but if you just want just a reliable small 4-stroke, go with the HS 142F-1G and 4G combo, it sure has worked great for me.