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OS FS-90 rear rocker

Old 01-19-2014, 06:19 AM
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W.P. Hurst
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Default OS FS-90 rear rocker

Does this engine have a crankcase vent?
Old 01-20-2014, 08:43 AM
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Yes, the crankcase vent was on the rear cover/cam housing.
Old 03-10-2014, 07:32 AM
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W.P. Hurst
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Is a o-ring and gasket set still available for it?
Old 03-11-2014, 06:21 AM
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No parts specific to that engine are available. It has been out of production for a very long time.
Old 03-14-2014, 10:14 AM
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W.P. Hurst
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Would the O-rings for the 91 work? Really need one for the pipe from the carb.
Old 03-17-2014, 06:41 AM
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We don't know. There is no parts cross-reference, and we don't know the size of the o-ring for the intake manifold to carburetor connection.

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