My street legal wr450 has 14/45 now. I have had it up to 94mph so far, but that that was "just to see". I have a 50t and think I want to put that on.. 1: how much difference will that make? Alot lower than i have now? I know 3 on rear is like 1 on front, but i am talking seat of the pants feel? 2: how many link chain do I have to buy? .. Also do any of U run lower than stock gearing? Thank You for any help.