Speedometer fix?

it also gives the odometer reading +8%. Those tires aren't lasting as long as you think.
I'm not sure that's true actually I noticed with tune ecu it's reading the same speed as my GPS. I'm wondering if the speedometer is telling us a different speed while the miles the bike is accumulating is going along with what the ecu is actually reading. If that made any sense lol
 
I've never had any vehicle that was spot-on. Manufacturers build in a legal margin of error to cover themselves. If people getting speeding tickets could claim they were mislead by the speedo readout there'd be a tidal wave of litigation.
Personally I'm all for it. If you stick to the indicated speed through camera traps you know you're safe.