The stock RS660 coolant reservoir is great for the street and with the stock fairings but is slightly cumbersome in size and location when prepping the bike for track use.
 
The Robem Engineering RS660 coolant reservoir relocation kit utilizes stock mounting points on the radiator and fasteners while creating a mounting location for a 275ml motion pro coolant recovery tank.  These tanks are readily available for replacement and more common in the paddock should you find yourself without a spare at the track.
 
Lightweight powder-coated aluminum.  Includes Motion Pro 275 Coolant Recovery Kit and mounting bracket.