S90: Gas Tank Mount Mod

Problem:  The rubber gas tank mounts would push the tank too far to the rear, which then pushed the seat back too far, which meant that the seat bolts couldn't reach the mounting holes.

Solution:  Dremel out some material from the inside of the mount so that the tank is able to ride a bit more forward.  Removing about half the width allowed the seat to fit while still providing enough rubber to keep the tank snug on the frame mounts.