My son is 5 and has been flat tracking his polaris scrambler 50 and loves it. I am wanting to get him into something he can be a little more competitive on and can find parts for. I was wondering what the difference was between drr 70 motor/frame and drr 90 motor/frame? Just wondering in that if i get him a 70 can it later be upgraded with 90cc top end or am i gonna be stuck with a 70 that he will grow out of much sooner? Any advice is much appreciated.
Thank you