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| SpeedCenter USA was a separate company started by John Olson to distribute at retail and to John's dealer network, a wide variety of parts and accessories. He was one of the first full page mail order advertisers in Dirt Bike and Motocross Actions.
Below are the original Dealer price sheets that include part numbers for both Monark and Sachs Engine parts. |
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| Page 5 | Page 6 |
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| Page 7 | Page 8 |
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