kfx50 won't start

have had this quad for awhile and never had a problem. it is all original. after it not wanting to start(and getting blisters in between my fingers from the pull start!) i removed all restrictors,replaced sparkplug,made i new air filter pod so i can use a UNIFILTER.checked and have great spark. i think i have isolated the problem to the carb. can someone please help as to what jet size,rebuild kit for carb, etc. or am i overlooking some elctrical connection somewhere that is causing it not to start? like i said all the electrical is original and in place, including the rear safety tether. any and all suggestion/replies will be appreciated. thanks.

should have started with the carb they are a pain but give it a good cleaning and you will be ok good luck

well i am still in the same place with this quad. i have installed a new plug cleaned and re-cleaned the carb, checked the compression(125) all electrical connection checkout, i have spark,air, and gas. am i missing something?