option

Hey people. I'm looking for opinions on whether to keep and brace my crf frame or i've got the option to pick up a reasonably priced billet thumpstar frame. The bike will have a +2 swingarm and a longer forks. one of these badboy's:

Hi guys and girl lol, have just bought me and my missus a tdr pit bike to have some fun on. Could any one please fill me in on what oil I should use? I have heard mineral 15w50 is the best option? It's my first bike ever so very new to all this but can't wait to go for a ride haha. Thanx for any...