Just a background on the quad. I got it for free a year ago trading someone my totaled SUV that still ran and I got all the money back from, so basically a free quad. I havent had much ride time other than a few hours here and there around my wife's rental property when it was vacant to get a feel for the quad and see what issues came up. The main problem I have had is the starting. Here is a list of items I have replaced in which the starting issue has been there before AND after.
Battery, spark plug, ignition coil, carb rebuild and then just full replacement, starter motor, oil change, new air filter