Originally Posted by todds

Wow, fantastic pictures! Thanks for the excellent post! The M180 seems like a great engine to learn on. Stout, durable and simple. I'm curious about the counterweight in the middle of the crank. I didn't realize straight sixes had any counterbalances, I thought they were one of the few common inherently balanced configurations (the other being a V12) Is this because it is a 4-bearing crank instead of 7 or am I confusing things? It sure does have a nice short stroke though compared to other cranks I've seen, I guess that and the cam are what keeps it happy at those high revs the rear axle demands. Pretty cool for 1951!

Perhaps I am biased ;-)