Very true, especially on smaller (gp bikes) added weight in certain areas keeps rotating mass inertia up, and will stabilize across accel ranges, sometimes, sometimes its better to be heavier.
In my experience on a dyno with very small very fast engines it best to reduce any "long" mass, pistons, rods etc. If you keep the roating mass closest to its cenerline the best obviously
Quote:
Originally Posted by mannymen
From light to heavy also works. It's all trial and error on the dyno
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