MOVE YOUR SPOT
Sometimes when I first spin up a crank, the correction area is off the counterweight. Instead of grinding up by the rod throw, try adding weight to the opposite end if there are balance holes already. I taped in some flat disc plugs until the “spot” moved onto the counterweight on this one (pictured). Be sure to clean the crank with lacquer thinner so the tape does its job, or you’ll launch them. This crank had the spot off the end almost 15° and 3 plugs put it on the counterweight. Duplicate the weight of the plugs and create a slug to tig weld in. This makes for a great looking job on a race crank.
Randy Torvinen
Torvinen’s Machine Shop
Menahga, MN
JAN, 2022
