cranky

[RBD]

Originally Posted by gasgasman

Ron.
Do you balance cranks also?

No I do not do any balancing on most any two stroke crankshaft. I find that the factoy counter weighting of their cranks seem to be nutral.

When you start changing the balance factor you are making the engine more RPM specific. In other words, you can make the engine vibration smoother at a specific RPM range (not a very wide range at that). This will make the engine vibrate in other RPM ranges.

If you are building a road racing engine you have a narrow power band and it is usually at a higher RPM's. Balancing an engine for these higher RPM's helps both power delievery and reduces the vibration. It will shake at lower RPM's, but you are not running the bike at these rev's anyway.

Like I said, most factory singles are balanced for the all around power RPM delievery.

Ron