Need help with jetting. I have 160 mains but not sure the pilots the numbers are not there. I have the air screw 1 turn out but have mess with it in and out. The plugs are black. It bogs all the way through the Throttle range. It will not rev all the way out. Not to sure what to do. It has the slp boost bottle put new reeds in it as well. I run this sled in BC canada Elavation around 2000. Let me know what you think.