I've played with a lot of gearing for the dragstrip and it seems like once you lower the front gear you actually slow down the usable acceleration of the bike. Every bike that I have lowered the front tooth ran slower qtr miles. That tells me the engine is working too hard to spin that little sprocket. It's great for wheelies and burnouts but optimal speed sucks. I would just leave it. Three up in the back seems like enough for me.