How manual transmission works.
Then the follow-up Motorcycle Transmission in action
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Vedauwoo 2001: Curtis Following Recombination
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Santa Monica Pier at Night
Ouray 2007: Schoolhouse Topropes
Taipei 2001: Scooter Swarm
Dusk at the Grand Canyon
KBCO 2002: Bottom Dwellers
Needles 2001: Newspaper Rock Up Close
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Canyoneering 2002: 11: Sara at Camp One
Newfoundland 2005: Signal Hill Coastline 02