The orion revolution usually takes longer to break in. Try 2.5 volts, at 0 deg of timing for abotu 5 min to start. Then check the brushes to see if there is wear across the entire face of the brush. Then for about 20 seconds or so, run the motor in at 5 volts at your race timing. This will seat the brushes pretty well...... someone else night have a better way though.
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