Drivetrain Vibration

Numbers are numbers and just what is on the paper that crank is junk. Stop this video at the end and compare the numbers. The crank my son spun was a external balanced crank. It is now internal balanced. 1.36 grams and 0.21 grams, He screwed that crank up bad. He should be liable

from what I see . He has it at 138 grams and 186 grams. Comparing the two It is 138 minus 1.36 is 136.74 grams out of balance on one side. 3 grams and less is good. 136.74 Not good at all. He forgot to look at the decimal point there is none.

A woman would love to sit in the seat and rev that thing. That's better then a sex toy.