Author Topic: 1954 RE 250 Clipper oil issue  (Read 299 times)

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Trickymicky

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on: November 20, 2022, 06:27:43 pm
Just acquired a 1954 RE 250 Clipper and for some reason with the engine running the oil tank rapidly pushes oil out of the filler neck, tried lots of things but am stumped, any ideas.
« Last Edit: November 20, 2022, 06:32:10 pm by Trickymicky »


AzCal Retred

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Reply #1 on: November 20, 2022, 08:02:28 pm
This is a pre-unit Clipper, yes? The feed pump may be dead and the scavenge pump is returning all of the timing chest oil to the main tank. Older models used the timing gears to lift oil back to the main tank. OR - the rocker feed is plugged and the relief valve is putting all the oil back to the main tank - OR the relief valve is failed open. Look at the oil flow drawing in the downloadable manual. The good news is that all this stuff is external.

https://accessories.hitchcocksmotorcycles.com/Workshop-Manuals-To-Download

https://accessories.hitchcocksmotorcycles.com/core/media/media.nl?id=238074&c=1062795&h=9891a7ed7561a686b818&_xt=.pdf
A trifecta of Pre-Unit Bullets: a Red Deluxe 500, a Green Standard 500, and a Black ES 350.