Felt like it was the drive shaft that was springy. That can't be good for efficiency, even if you're not a masher. Also the bike felt twice as heavy as it should have been, but we're talking a 30yo design. Maybe the new ones are lighter and better. Speaking of mission critical uses for chains, every parking lot anyplace has valves and pistons relying on them to not crash and burn.. Oh add one more fun fact, the Toranado's design has a chain handling 100% of that big block torque! Worked fine.