I'm thinking about doing a 520 conversion with a DID ERV3 race chain and going up a couple of teeth in the rear to a 45. Anyone have any experience doing this? I might even just leave the stock chain and front sprocket and just put a lighter steel Vortex 45t on the rear. I don't care about losing any top speed because I'm flashing the ECU, but just want a little more "wheelie power". Thoughts?