2016 Street Twin Front Sprocket Swap

Ahoy fellows,

I have just purchased a 19 tooth front sprocket to exchange for the original 17 tooth front sprocket. Just to give it some more legs on long runs. Off to the Bike Loft in Belgium shortly.

The local dealer has just suggested that the speedo sensor is linked to the front sprocket thus if the sprocket is swapped this will alter the reading of the speedo-metor ?

So, is this correct as I would have imagined that a reading would have been taken from the final drive shaft ?

Additionally, he mentioned a fixed called a 'healing sensor' albeit from another model.

I would be grateful if anyone could offer any information or clarify.

Thanks in advance

Mike