I'm installing (or my dealer is installing on my behalf) a set of Arlen Ness rims on a 2007 Deuce. As part of the installation the matching Ness chrome pulley will also be installed, but the stock pulley on the Deuce has 66 teeth whereas the Arlen Ness pully that matches the rims has 70 teeth.

I also need to change the belt to a narrower belt (PN 40655-06), but thats straight forward. Can anyone tell me what if any change to performance this changine over of pullye's willmake?

Would any change be required to the transmission gearing ration to compensate?

My simple understanding is that the larger the tooth count, the quicker it spins ths the higher the revs. A 66 would also have greater power than a 70 tooth (same simle mechanism as a geared bicycle), but would the difference be noticable or determental in any way to the transmission or the engine?