The stock tires/wheels are pretty heavy. Rears weigh about 21ea and the front 15ea. For Dune tires, Skat Trac or Padla Brat rears can weigh down to 11 pounds including the wheel. Front razr back from STU can weigh under 10. As for other things, stock hubs weight 2.5 pounds and the aluminum ones probably weight less. Stock skid plate is about 4lbs. Plus you can cut front fenders off, remove the plastic behind the foot pegs, remove the airbox and snorkel. You could prettey easily shave off 35-40lbs if not more. Getting much more would probably be expensive, like axles, swing arms, (kick start could probably save 15-20lbs easy).