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Author Topic: Oil line crush washers  (Read 3171 times)

Offline Liam

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Oil line crush washers
« on: November 23, 2020, 09:06:25 PM »
Hi...  Would anyone know the size of the two aluminium crush washers sealing the oil lines to the oil tank.   They're not noted as a part in the parts catalogue so looking to see if I can source elsewhere.
Bike is a CB750f (1975).
Cheers
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Offline Trigger

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Re: Oil line crush washers
« Reply #1 on: November 23, 2020, 11:55:36 PM »
You can get a upgraded kit from Yamiya that come with alloy washers and rubber seals  ;) I may have a kit in stock if you need one.
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Offline gtmdriver

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Re: Oil line crush washers
« Reply #2 on: November 24, 2020, 07:45:05 AM »
Dowty washers are aluminium crush washers with a built in O ring. You can pick them up on eBay. You buy them by ID. Just measure the bolt size.
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Offline Trigger

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Re: Oil line crush washers
« Reply #3 on: November 24, 2020, 08:38:16 AM »
Quote from: gtmdriver on November 24, 2020, 07:45:05 AM
Dowty washers are aluminium crush washers with a built in O ring. You can pick them up on eBay. You buy them by ID. Just measure the bolt size.

The Yamiya upgraded type are not dowty washers  :o They have a separate rubber seal  ;)
I have tried dowty washers for this job and they are too thin to do the job .
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Offline UK Pete

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Re: Oil line crush washers
« Reply #4 on: November 24, 2020, 10:06:06 PM »
Can old ones be reused

Sent from my SM-G950F using Tapatalk

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Offline Spitfire

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Re: Oil line crush washers
« Reply #5 on: November 25, 2020, 10:25:52 AM »
When I restored my F1 I was surprised to find one in one of the lines as it was not shown on the parts book so I put it back in when I had finished the job, that was in 2007 and I have not had a problem with it.

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Dennis
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1976 CB750F

1977 CB750F2 In bits

1964 BSA A65R In bits

Offline philward

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Re: Oil line crush washers
« Reply #6 on: November 25, 2020, 11:03:16 AM »
Same with me on 2 of the 3 750's I've built in last 6 years (that is I've re-used existing seals) - my K2 has re-used seals and OK since 2015
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Current Bikes:-
Honda CB750K2 (1975)
Honda CB500K2 (12/1972)
Honda CR750 Replica (1972)
Honda CB350K0 (1969)
Kawasaki ZZR1100D3 (1995)
Kawasaki ZZR250 (1990) Project (Going on eBay ASAP)

Offline Trigger

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Re: Oil line crush washers
« Reply #7 on: November 25, 2020, 01:20:44 PM »
It depends on if, they are damaged or over tightened. I always fit new ones as, it is a mess if they start leaking  ;)
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Offline Liam

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Re: Oil line crush washers
« Reply #8 on: December 01, 2020, 08:26:32 PM »
http://www.yamiya750.com/index.php?main_page=product_info&cPath=21_66&products_id=1974

£3.50 for the washers...  and of course £20.00 for postage...
« Last Edit: December 01, 2020, 08:32:23 PM by Liam »
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Offline Trigger

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Re: Oil line crush washers
« Reply #9 on: December 02, 2020, 02:52:45 PM »
Quote from: Liam on December 01, 2020, 08:26:32 PM
http://www.yamiya750.com/index.php?main_page=product_info&cPath=21_66&products_id=1974

£3.50 for the washers...  and of course £20.00 for postage...

Plus VAT and custom clearance charges  :o As i said before, i have a few sets in stock if you need one  ;)
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