I have this engine on a Twist 40. It is a powerful, easy starting, reliable, sweet running engine. I bought it used on RCU for a very good (cheap) price because everyone knows this engine is no good and drives everyone crazy and has been found by the State of California to cause cancer and birth defects. Having said that, I don't think this is a best choice for a basic training engine. It makes a lot of power, certainly more than would be useful for a trainer. If you want to buy this engine for some future project down the road, go for it, but for a basic trainer, I recommend a Super Tigre 40 or OS 40/46 LA. These are economically priced engines that will give many years of service and would be excellent choices for your trainer. Good luck to you, whatever you choose.