SkiDoo has authorized several updates to the 05 Mach Z on Sept 7. These updates will be done under warranty at no expense to you. The updates include: Electric Fuel Pump Kit (590-177-000-1), EGT Sensor (512-176-132-1), Rave Valve Cable Kit (420-997-023-1) and Pyramidal Bolt(s) Upgrade (250-000-253-6). I've attached an Acrobat (.pdf) file that covers the specifics. Open up the detailed file and print it for your dealer. My dealer here has ordered the parts (some on backorder at this point) and says he can do the Mach in the next 2-3 weeks. Good Luck with your dealer.