I don’t have any experience with the china bikes but I did buy my daughter a china 4-wheeler back in 2007 for $900 shipped.
It really is of decent quality for no more than we paid. It had quite a few flaws in design and reliability but nothing major, all minor fixes.
One major flaw was the main motor mount bolts broke within 6 months of use. I replaced the rear with a grade 8 bolt, then the front bolt broke replaced it and never had that problem again. Cheap low grade bolts were used and couldn’t with stand the stress. Simply fix.
The rubber adapter hose from the air box to carb was low grade rubber, it began to crack in about 3 years and I replaced it with a adapted silicone hose.
The lights were cheaply mounted and either broke off or fell of in a few years. I didnt replace them as she didnt need to ride the thing in the dark anyway.
If the battery isn’t kept on a trickle charger during the winter months it be dead come summer but that is kind of normal.
I kept the cables oiled and chain lubed at the start of each season followed by a carb cleaning. The chain kept popping off, figured out the flimsy chain guide was misaligned. Made a stronger chain guide out of some 1/8 flat steel and fixed that problem.
All and all the problems were minor and the motor and the way the 4-wheeler drove were fine.
For $900 I feel like my daughter definitely got my moneys worth out of it. But if your the type that doesn’t want to work on it at all, then stay far away from the china stuff.
You will have to work on it guaranteed. That’s just my advice, who knows you might get lucky and have no problems.
The funny thing is if they would raise the price by 50 to a 100 bucks they could have fixed every issue a had with the machine and still been affordable with better reliability.
Just my 2 cents. 