I have a shinko 712 in front and an avon roadrider in back. Performance is great with this combination. Nothing wrong with Shinko tires other than not designed for rear tire use.
Maybe it's because most of us value our bodies and machines enough so that we don't purchase inexpensive tires hence no experience to draw on. I've been watching and wondering how long that this thread will continue before it somehow morps into either an oil or carburetor thread or maybe both.Baldy, is that right: Shinko are not for rear fitment?
If so, congratulations, you have actually answered the specific question of the OP (unlike the rest of us) !