Join Date: Jul 2015
Location: Toronto, Canada
Plant your bike on something sturdy, (so that both wheels are off the ground)- start the motor,put it in gear, and point a strobe light at the rear wheel- you will be amazed at what this shows you.
With the handlebars rigidly held, spin the front wheel as fast as you can, and strobe it also. (I read about this in one of the American bike rags, many years ago.)