Re: what the best 2 strock for the price?
There all about the same, the only difference is the person selling it to you. I'll say DAX cause I have his F80 engine and it's awesome. Seems a little more heavy duty and ran better than my grubee. Also he seems to be a good guy on his warranty, and will work with you. I thankfully haven't had any problems with his stuff minus the RX carb having issue with air and fuel leaks, but it rules and isn't hard to fix. His kits are a little pricier but It looks like it might come with some better stuff and a warranty.
NOW, if your not one to tinker with stuff and don't wanna be working on your bike more than you ride it (atleast it'll seem like it) go with a four-stroke kit.