Fuel line connector seal UK - MVAgusta.net
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post #1 of 19 (permalink) Old 08-20-2019, 12:49 PM Thread Starter
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Fuel line connector seal UK

Hi,

I have pinched the small seal of the fuel line connector. I did already upgrade to the metal ones, now I am in a rush where can I get one near Milton Keynes tomorrow morning?

Thanks for the help.
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post #2 of 19 (permalink) Old 08-20-2019, 12:57 PM
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Any Ducati shop should have that o-ring. It is a common o-ring. Auto parts stores should have them too.

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post #3 of 19 (permalink) Old 08-20-2019, 02:25 PM
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Tom parker do them but they’re in Preston. You want a viton seal.

https://tom-parker.co.uk/

Hope you can find one locally.

Cheers
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post #4 of 19 (permalink) Old 08-23-2019, 06:32 PM
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Quote:
Originally Posted by Nito View Post
Tom parker do them but they’re in Preston. You want a viton seal.

Nito
You DO NOT WANT A VITON O-RING.......
Check the fluid compatibility charts

The size you want is a metric one, it's slightly smaller and so it doesn't get cut,
The McMaster-Carr part number is #9262K141
In the US, if I order them buy 9am, they'll usually be here by 1- 2 pm the same day:grin2
They're ~$5 per 100

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post #5 of 19 (permalink) Old 08-27-2019, 03:04 AM
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I'm always happy to be educated, why would you not want a Viton O-ring? Are you talking about the material, or the size? What material is the McMaster one? OP is in UK, I suspect the CPC one would be easier to acquire.

I use Colder Products Company CPC connectors on my Aprilia with Viton seals, with a smear of vaseline or engine oil to prevent tearing, I've not cut one yet.

Don't take my word for it, here's a retailer link for an MV kit;

https://mygpracing.com/product/mv-ag...-set-4-pieces/

From Eastern Seals website
Fluorocarbon (Viton ® FKM) | Eastern Seals (UK) Ltd

"FEATURES:
Viton® has excellent resistance to high temperatures, ozone, weather, oxygen, mineral oil, fuels, hydraulic fluids, aromatics and many solvents, and therefore used for o rings and cord. Fluorocarbon possesses low gas permeability, low compression set, and good mechanical properties.

High fluorine grades of Fluorocarbon offer higher resistance to swell in high octane and oxygenated fuel blends. This gives Fluorocarbon a superior performance in Ethanol/Methanol blended gasoline."

or here; Chemours now own the Viton trademark I believe
https://www.chemours.com/Viton/en_US...ons/index.html

or here, I think it was a DuPont product prior to Chemours;
Automotive Connectors | DuPontTM Vamac® and Viton® | DuPont United Kingdom

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post #6 of 19 (permalink) Old 08-27-2019, 03:27 AM
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Simple Nito.......
Buna N O-rings are rated higher for gasoline AND Ethanol
The fuckwads at Ducati started the Viton fad......last time I checked their fuel pump plate O-rings were $17 each
MV only fucks you $12 for the same O-ring

25 Buna N O-rings are $8 and change from McMaster-Carr or $0.32 each

Which would you use?

I used to put 2 in with each hub bearing I sold and ~8 quick disconnect O-rings too
The quick disconnect O-rings are ~$5/100

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Last edited by theknurl; 08-27-2019 at 03:30 AM.
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post #7 of 19 (permalink) Old 08-27-2019, 04:17 AM
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I'd use and do use the Viton, cost is not really a factor, we're talking pocket change here in reality.

"Fuel systems

If you are running pure gasoline or petroleum diesel in a non-return fuel system, NBR seals will be perfectly acceptable. But change the fuel to an ethanol blend or biodiesel and you should be looking at FKM. If you have a recircualting system (i.e., return line to the fuel tank), FKM seals will generally be more resistant to the oxidized fuel. Nitromethane systems require EPDM."

(FKM=Viton, NBR=Buna).

While Buna is likely perfectly acceptable and cheaper, with sincere respect, that's slightly different from saying;
"You DO NOT WANT A VITON O-RING.......
Check the fluid compatibility charts"

I am very happy with Viton and knowing that I have what the Automotive sector had been touting for some time as the best product for fuel systems. I'm not dissing Buna or anyones decision to fit but equally Viton is not inferior, just a dearer alternative.
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post #8 of 19 (permalink) Old 08-27-2019, 07:31 AM
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Viton or Buna-N...either is acceptable.
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post #9 of 19 (permalink) Old 08-27-2019, 06:10 PM
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I have experience in the industrial hose industry, worked in it for about 20 years, so have a good working knowledge of rubber compounds. Quite simply, Viton has superior properties to NBR, or Nitrile to go by it's Dupont trade name. As far as this application is concerned, it is more resistant to the effects of petrol (gasoline), heat and aging, by an order of magnitude. However, it also significantly more expensive, which restricted it's use in the hose industry, but where the application required it, there was no question about the choice. In the case of our bikes, it's the individuals choice. Nitrile will do the job, but with a reduced life. Also, Nitrile does not like the atmosphere, so will suffer in storage unless in sealed containers. Thats why hose that conveys oil, fuel etc, will have a nitrile tube, but a neoprene cover, which resists ozone ageing. My choice would be Viton every time.
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post #10 of 19 (permalink) Old 08-27-2019, 06:27 PM
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What most are missing or ignoring in this conversation is the effect of ethanol. Gasoline is not the problem.

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