Two strokes are difficult to hone as the tool tries to drop into the ports.many shops use a tool with stones on wires kind of like a wire brush but with stones on the end of the wires. These will damage the ports
You need a tool that uses 3 flat stones & use a slow speed drill to hone the bores .
You still need to be careful that the ends of the stones don't drop into the ports
You might be better going to somewhere that does motorbike engines if you don't want to do it yourself
something like this you need