Second in my super-popular series of HOWTOs for the 2006 Yamaha Jog ZR. I replaced the stock speedometer, which topped out at 60km/h, with a Kitaco custom one that goes to 120km/h. I now know how fast my scooter goes: 70km/h.
Today I hope to get outside and replace parts of the transmission to up that further.
HOWTO upgrade the speedometer (Flickr set):