Quote from: Chuckie25 on September 27, 2013, 05:49:27 pm

So basically,,,,

9 grams off the clutch assembly would be roughly equal to only 3 grams off the flywheel. In effect,,,

Correct?

............A flywheel will be the most effective flywheel if all of the mass is concentrated at the farthest distance possible from the axis of rotation.

Quote from: Chuckie25 on September 27, 2013, 05:49:27 pm

So basically,,,,

9 grams off the clutch assembly would be roughly equal to only 3 grams off the flywheel. In effect,,,

Correct?

Yes, if you took 9 grams off the clutch assembly at the exact same distance from the center of the clutch (lets say at 2 inches from center of the clutch) it would be roughly equal to removing 3 grams off the flywheel at 2 inches from the center of the crankshaft.

Removing alot of weight near the axis of rotation does almost nothing to reducing the moment of inertia but it will act like you took one happy meal's worth of weight off of your butt or bike.

A flywheel will be the most effective flywheel if all of the mass is concentrated at the farthest distance possible from the axis of rotation.

In the context we were taking about I was not referring to the ignition flywheel, I was referring to the clutch's flywheel effect.  The clutch, a transmission shaft, a gear, a sprocket, the crankshaft, the water pump impeller, are funny shaped flywheels.  Anything that has mass and rotates has a moment of Inertia or saying in laymen's terms:  Anything that has mass and rotates is a flywheel or has a resistance to rotational acceleration.  The Moment of Inertia of an object is just a number that we put on the amount of resistance the object has to rotational acceleration.  Knowing the moment of inertia of an object allows is to compare the angular momentum, angular acceleration, and angular velocity of different shaped objects rotating at different RPMs.

Two rotating object can have the same Moment of Inertia (flywheel effect) and one object can be 1000 times heaver.  It depends how far the mass is concentrated from the axis of rotation.

If you want to learn more about this subject it is in any physics book or engineering text book under the subject of Kinematics or Dynamics.