There are a lot of good choices these days I have seen that are made in China, the CRRC and DLE are just two of them, both lighter then the Zenoah and packing a lot of power but the Zenoah engines are hard to beat, very user friendly and you can always find parts for them if needed. They have been around forever and for good reason. You can go to the gas engine forum and look to see what other guys are using and what they think. I can still get any parts needed for even the old G-23, sometimes in the blink of an eye the new engines are gone and off the market so it's something to think about.