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[bbowler]

  Hey all,

          My questions is this, does the speed and odometer get their readings fromthe front wheel spin? and as I changed the front tire from the stock 18 inch to a 21 inch i was told that i will actually be going a bit faster than what the speedo says but how will that affect the odometer, will i be going farther than shown, by how much?   alot of questions but thanks,

[GregKhougaz]

Yes, the speedometer and odometer get their readings from the front wheel.

Take a look at these: 

Tire Size Program

Tire Diameters

[grc]

 Hey all,

          My questions is this, does the speed and odometer get their readings fromthe front wheel spin? and as I changed the front tire from the stock 18 inch to a 21 inch i was told that i will actually be going a bit faster than what the speedo says but how will that affect the odometer, will i be going farther than shown, by how much?   alot of questions but thanks,

The speedometer/odometer doesn't care what the front tire is doing, it gets it's signal from a sensor mounted to the transmission.  If you change the final drive gear ratio, or the rolling diameter of the rear tire, it will affect your speedo.


Jerry

[Twolanerider]

Actually everyone could be right.  Depends on if it's an older or newer bike.  If it's the 2010 under your user name the speedo, radio AVC and s bit else is fed from a speedo sensor in the transmission.  You will have sensors in the front wheel.  They're for the ABS system.

[bbowler]

so since i have the 2010 any front wheel change doesnt affect any readings? I guess thats cool, i just wanted to make sure my mileage readings and speed were accurate in my mind anyways