These pages are dedicated engines power up by minimalizing friction
and rotating masses.
Hints for choice of crankshaft bearings :E - Mail
To add up whole rotating masses weight loss by all modifications , substitutions i think it's nearby 4000 gr !!
Imagine 4000 gr at 10000 rev. per min.!,you'll never enter a corner.
3 Divisions:(rotating)
A very light alternator system.(Detail pix)
Sprockets weight reduce information and some detail pix.
Clutch : inner segment substitution (Detail pix)
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Static mass:hints , where you can find superfluous mass.