I HAVE A 97 XR400 , STOCK except the snorkel is removed and the exhaust tip is removed, I want to install a vortip to quite the bike down a bit. I know I will have to je-jet,but where is a good starting point for the Main,pilot and clip. I ride between 7,000 and 10,000 ft. This jetting thing is a bit new to me and I sure could use some help. Thanks,