Excellent engine! Yes, the honda gx-160/200 parts interchange. the carbs/rebuild kits are the same as honda. I have 4 of the Harbor Freight 6.5 hp some HIGHLY moddified, pushed to the limit well over 14 hp each, spinning well over 6500 rpm. Using a combination of Honda, ARC, and other aftermarket parts. I have 2 6.5's that are bone stock, and 1 13hp (GX-390 clone) have not had ANY issues with these engines.
Keeping the gov. connected and/or keeping it under 4500 rpm (3600 is normal), with regular oil changes and the thing will last forever. If something does happen, they are the easiest of all the small engines to work on!
For those that speak badliy about these engines perhaps they should check out 4 cycle karting forums and the "clone" class. Briggs and Tech's are available used. Techs are GARBAGE! The company is out of the small engine business. Techs carbs **** ***, no choke WTF! I actually retrofitted a Harbor freight 6.5 "clone" carb to a tec vs. paying out the rear for a tec carb with a choke.