i bought a sach's madass clone made in china, and it had that honda copy motor in it. When the chineese copy czechoslovakian design, no good can come of it. The motor leaked like hell from the time it was brand new. The clutch always slipped, and the bike was generally very underpowered. As for the rest of it, same poor engineering, to the point that i had to make new brackets here and there to even get parts to sit right. The rear brakes NEVER worked, once again, poor design of the calpier, that would NOT seal. None of the lights worked, all the connectors worked themselves loose, and so on.
And that's the way it came brand new shipped.
further down the line if you wanted to get parts (brake pads, air cleaner, piston rings, chain, sprockets, etc.), you might as well look for unicorns, you have a better chance of finding those. The real jap bikes (honda, yamaha, suzuki, kawasaki) are much nicer because the parts for them are generally readily available.