04-10-2019, 04:37 AM
You could probably bounce your CB off the rev limiter all day and not hurt it. That should be true of any production motor, but as an owner of Harleys for almost 30 years, I would not say it would be safe with them. The problem is that the longer the stroke is of a motor, the faster the piston speeds are as the revs climb. "Square" motors with equal bores and strokes can rev higher safely, as can "oversquare" motors where the stroke is less than the bore, keeping piston speeds lower than long stroke motors. With a long stroke motor, a piston has a lot of ground to cover with every revolution of the crankshaft, resulting in very high piston speeds and a lot heat and stress if revs climb too high.