I am building a 4 stroke and started out with the dax super titan. I was intrigued that it has more horse power than the other 49cc's (he claims it has 3hp). I asked Duane if its the same motor, how can it have more horsepower than all the rest? He didnt have an answer. I think its BS, they are all the same, just with different transmissions. So when I got it, I realized the final chain drive won't fit on the standard hub adapters because it uses an 8mm chain. Also, with a 3:1 reduction, you need a huge sprocket if you plan to replace the crap rag joint set up it comes with. He said rag joints are better than Sprocket adapters and tried to make me believe they strengthen the spokes. He then told me my Chinese two stroke I bought from him was made in the USA. That's when I stopped believing anything he said. I ended up returning the motor to him because I was not satisfied and I wish i did a little more research before I bought it, but live and learn. When he received my package, he claimed the choke lever broke on the Carb, and now wants me to replace the whole carb and pay 30 for labor! We are still in dispute about this and has not been resolved yet. That's the end of me doing business with Duane.
Now I have an ezm kit, and it seems much better quality. I have not started it yet though, so nothing to report until a few more weeks.