Rim was purchased new when the bike was set up in I believe 2014...yes standard rear spring, fronts are stock with heavy weight oil. I do not have the OEM front. As far as carb I am honestly not sure. Bike was set up for me by Hoblick and then I was lucky enough to have a race mechanic. I would honestly just show up to the track, my bikes and trailer would be sitting there tuned for the week and ready to race, I threw my leg over went out to practice then came back in had my tire pressure adjusted while hot and then went out and raced. When done they went back in trailer and mechanic took home and prepped for next race.