Hey guys, I need to get a new chain and sprockets and I want to know if I should change the teeth on the back. My engine just got done by Eric w/the 2mm over kit(now a KX267) and I had the porting cleaned up, but otherwise left alone. I've just been play riding, but I'm going to start racing a little next year(MX and Hares). I've ridden pretty much everything Michigan has to offer(terrain-wise) and the bikes been great. Should I keep the gearing stock or will I get benefits from increasing or decreasing the teeth?