Re: Top Speed, 80cc Chinese motor? what is the record?
I agree, run it a little rich to start and keep the first couple of runs short, keep an eye on the temp, retention the head.
Then if it's not preforming as wanted, pull her down and try something else.
But for me, they're just a toy.
Not a 'daily' that I hope to get 10 000 Km from.
I personally think, If you want it to do 10 000+ Km's, 10 000+ RPM is not advisable.
Keep her fairly stock, break her in gently, (boring!)