we built a gsxr kart but we really need to find the smallest battery since the original is basically in our laps. we are using a yuasa size 9 battery but its still to big, this thing seriously has no room. most people recommend a size 7 that has 6 amps, the 9 has 8. ive been looking aT A 3 that has 3 amps but its really small and im not sure itll run all the accessories like lights and stuff. just wondering if anyone has any experience with using the smaller batteries, i guess we should have thought about the battery before we built it. its running as a stock 750 so everything works even the lights. thanks for the help.