just bought what I thought was an '86 kx500, found out it's an '85. That carb has a #350 main jet, #35 pilot. I'm at 5000 ft. Is this jetting at all right for this altitude? I thought for sure this bike would be power wheelie prone. from what I heard, the earlier 5hundo's were more violent. I checked the reed block and it's all good. compression is great. i'll check the gearing and get back with ya'. just wanted to know if anyone has any jetting for this year bike, this altitude, all the jetting specs i've found are for '88 and newer(different carb). I found it hard to belive that this thing can run well with a main jet hole the size of a pencil lead.