Re: my opinion on the china girl ..
I must have gotten the good one. I'm a master photographer so I was pretty much lost. I screwed up the install and had a master mechanic give me advice when I replaced the rings.
That is the only trouble I ever had except stuff falling off because I'm too lazy to check the torgue before I ride. I had a muffler almost fall off today.
A lot of the kit non engine parts were trash but not a big thing. It was easy to work around them.
Then again I'm old and don't expect my bike to be a motorcycle or a fine German car, it's just a hundred and fifty dollar motor on a thrift shop bike. All together less than a fancy road racer bike and I can out run him, on a good day.
I would never buy another one because now I build and ride alternative engine bikes.
My posts have entertainment value only. A bike ain't yours till it has your blood on it. Then it owns you.