| 21. | In 1923, BMW released its own unit construction shaft drive flat twin of 498 cc.
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| 22. | Intended for use with a sidecar, the Marte had a shaft drive and hand-operated transmission.
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| 23. | The XS-1100 followed in 1978, again with shaft drive.
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| 24. | The later cars had shaft drive and a three speed transmission located with the rear axle.
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| 25. | Final drive was a direct shaft drive with a transmission of two speeds forward and reverse.
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| 26. | The inline engine made this technologically feasible ( BMW motorcycles had already used shaft drives ).
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| 27. | Instead of a shaft driving the rear wheel, it would drive the front and sidecar wheels.
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| 28. | The shaft drive was constructed from a Chevrolet 1-ton truck differential that was cut in half.
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| 29. | This had a single overhead camshaft engine of 350cc, shaft drive and a pressed steel frame.
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| 30. | Reputedly this created problems with the shaft drive, as the gears tended to strip under power.
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