Just bought my first PWC; 2007 RXP 215 w 145 hours from a dealer I had purchased my 2013 Honda CRF450R from. Previous owner had this dealer rebuild the supercharger, change oil, filter & install a new battery at 127 hours ($1,687.) Regarding performance mods, would someone send me a link to posts on this subject? I replaced the OEM Intake Grate with a Riva & considering Riva / R&D Power Plenum Air Filter & Blow Off Valve Kits. Are they worth the $$$ & may I have your Feedback concerning these? I am considering buying a new 2015 RXP-X 260 at the end of this year...