Been having a couple Can Am guys wanting to adjust their speedometer because of bigger tires. We offer the PV3 and it does alter the ECU but unfortunately the PV3 will not correct the speedo. Our guy Dusty from DynoJet told me it has to do with the EPROM. From my limited knowledge and Google search lol, "An EPROM (rarely EROM), or erasable programmable read-only memory, is a type of programmable read-only memory (PROM) chip that retains its data when its power supply is switched off." 

So for you Can Am guys wanting to adjust the speedo, we cannot. That may be a dealer job. 

-Hunter