Stroke
When the piston in a motorcycle engine moves from TDC (Top Dead Center) to BDC (Bottom Dead Center) or from BDC to TDC - the distance traveled is referred to as the stroke. The stroke takes one half of a revolution of the crankshaft.
Motorcycling News- AMA to sanction WORCS events for 2009The AMA and WORCS will also partner on several rounds of the AMA Western Hare Scrambles Series.
- AMA Congress convenesThree days of discussion and voting on proposed rule changes to AMA Sports amateur racing programs and AMA Road Riding recreational activities planned.
- Team SuperTrapp's Matt Weidman is 2008 AMA Flat Track Rookie of the YearWeidman finished 12th overall in the GNC Twins series and 20th overall in the GNC Singles series, placing him 14th in the combined points total for the two series.
- AMA to sanction WORCS events for 2009
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