The problem: Fuel-n-whatnot deteriorates the OEM lower tank mount bushings Solution: Either Aluminum(2pc) or Delrin(2pc) $25 shipped to your door in USA or Canada. $30usd to anywhere else Want a backup set? $40usd gets you 4pc of either material Aluminum Delrin Black Delrin installed You can take your pick between the aluminum or black Delrin. Both (2pc alum. 2pc Delrin) can be had for $40 shipped, so you can try each. Both of the materials hold up well. Some prefer aluminum because it will last longer, others chose Delrin due to it's self lubricating properties - you chose (it's simular to the 'what kind of oil should I use'). How long will these last? I don't know. The in-house "Test Bike" had 3000 miles on the Delrin bushings when I took it apart to inspect. There was no wear, visibly or by measuring . So they could last 10k or 50k miles. I've been selling these for a while via Mudguts vendor thread for his Upper Tank Bolts. This thread was started so you could find these faster. PM for ordering info. Have a great ride!