Love mine but can't find upgrade parts that fit. The only things so far ( for me anyways ) cam, carb , springs , air filter, pull start
Billet Connecting rod didn't fit , gx 200 piston didn't fit, exhaust header didn't fit without some modding. Seems to me some some of its parts are a little bit larger to achieve that extra .5 hp.
Got mine used on my Yardcart , had a starter but was removed b4 I got it and besides a some carb issues the motor itself has ran good and still looked to be in good condition when I took it apart to mod it.
Almost all honda or clone information is the same for it though if you do decide to mod it some. Just be cautious when you buy parts and DO your research if you do mod it.