Me and my dad recently put a 66cc kit together and I'm using it to ride around my neighborhood to save gas. The problem is the thing only goes about 20mph. I know its a small motor but i hear ppl getting 40mph on these things. I heard about the upgrade for the carb and the exhaust which im going to do...and the boost bottle....Im just wondering if those are going to get me +20mph...it seems at 20mph the engines revs are pretty high and idk what to do to get 40 out of it...also im still in the semi-break in period which im running gas at 25:1. When i go 40:1 is it gonna improve performance that much. I just seem a little disappointed in the performance.