IM not so sure thats a champion frame, most champions have the square swing arm, and have normal shock mount point under the seat, with a brace coming at a longer angle to meet closer to the countershaft also the rear loop is weird like its an add on slip fit, somthing not right in there which is taking that rear end out too far and makes it look soooo wrong.
Id be going for somthing else, redline, C and J or definately post 75, could even be a copy like a gringo, but id leave it open. but the tank is definately an ugly add on mount and that pipe is a real dunger.
And is that a YZa front and rear ? what a waste.....