Was running 110 because the guy told me it HAD to run race fuel. Keihin PWK (on the side it says 72RA4  TJR) not sure on jets (its been a while since i had the carb opened up) elevation im in Yuma AZ (next to Gordon Well or Glamis California) I'll upload pictures temp can range from 50 degrees to 110 degrees. Was using a BR8EG plug (the nipple came right off.) Was going to try an iridium plug but didnt want to just run through iridium plugs(BR8EIX). The first picture is the plug that got over extended.