From what I have seen the kits offer a pretty good price on the kits, if you buy the parts individually you will pay more for the same things. But in some cases the parts in the kits are substandard to what you might want. The rag joint is not the best of the options for your rear wheel, but it will be the one in the kit. If you can live with the little things, the price is great, but if you want top of the line options, then spend the money up front. I bought the 80 Monster, I am in my 70's, if I need speed, I have a car and pickup, my bike is a toy to play with at the ranch. The rear wheel sprocket could be upgraded, but it handles what I give it. The motor mount is a "cluster", but it works. If either give up the ghost I will upgrade with a build of my own design in my own machine shop.