Stock Speedo Affected by Drive Sprocket?

Discussion in 'Sportster Models' started by husker71, Oct 23, 2007.

  1. husker71

    husker71 New Member

    Hi Guys,

    My bike started life as an 883 and is very customized now. When I did the initial engine work I changed the drive sprocket from the 883 version to the one on a 1200. Would this affect the accuracy of the speedometer?

  2. glider

    glider Veteran Member

    Not sure which "drive sprocket" you are referring to here.

    If it is the front chain sprocket or the rear chain sprocket in the primary case, then NO it will not change the speedo.

    If you are talking about the drive sprocket that the rear drive belt rides on , either the front one or the rear wheel one, then YES it will effect the speedo accuracy.

    The speedo works off the gear tooth count in the trans on the 4th gear cog with the electric speedos so changing the ratio before that will have no effect on the speedo accuracy .