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Royal Enfield Motorcycles
Vintage Royal Enfield
1954 RE 250 Clipper oil issue
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Topic: 1954 RE 250 Clipper oil issue (Read 729 times)
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Trickymicky
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1954 RE 250 Clipper oil issue
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.
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Last Edit: November 20, 2022, 06:32:10 pm by Trickymicky
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AzCal Retred
Chennai Wrencher
Grand Gearhead
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a journey of a thousand li starts under one's feet
Re: 1954 RE 250 Clipper oil issue
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
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A trifecta of Pre-Unit Bullets: a Red Deluxe 500, a Green Standard 500, and a Black ES 350.
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Unofficial Royal Enfield Community Forum
Royal Enfield Motorcycles
Vintage Royal Enfield
1954 RE 250 Clipper oil issue
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