Seller notes

Custom Chromoly 4140 lightweight flywheel/counterweight. Cnc machined and bead blasted. Features the same bolt pattern as the stock flywheel for the PTO Stubby. Saves about 1.75 kg weight over the heavy stock flywheel thereby greatly improving the engines performance under acceleration and its willingness to rev. Balance remains unchanged and is verified on a dynamic 2 plane balancing machine. Does not work on a KM37 without removing material on the counterweight because of the lower rotor mass....

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