Not sure of the circumference of the harmonic balancer and I don't have timing tape. I believe when I have done something like this in the past I was able to use a piece of painters tape cut to an exact length and put marks at 90 degrees intervals around the balancer. I need to know the circumference of the balancer or the correct length of the piece of tape that I need to make to do a template that will allow me to make marks all around the balancer at 90 degree intervals so I can do the test correctly and efficiently.