i have a 04 Zx10 and on the dyno the speedo stopped at 189 and also tops out i have a power commander thought that would lift the limiter but i guess not. what can i buy or do to change that?
You can't. The bike isn't limited to 189, the gauge is. The bike continues to gain speed, the speedo just won't register it
And you need to factor in speedometer error... Just because it says you are going 189 mph doesn't mean you are actually going that fast. :wink:
Get a speedo healer, program in an appropriate correction factor, and then run it again...