80mm

for the theory on this download Phil Irvings fabulous book Tuning for speed http://tuningforspeed.com/ just to show you how easy it is to check the static balance factor of a single cyl crank I could have used fancy parallels at work but i wanted to show that anyone can do this at home in...

I got a 700 Kit off Ben last year. The plan was to put it in when I wore out the stock 100mm ELKO piston. With 210 Hard hours on it and showing only 0.02mm wear on the piston and 0.01mm wear on the liner I decided I would grow old boring and very slow before I wore out the mighty berg 628...