O Rings

Simply Bearings Ltd ~ Oil Seals SKF FAG TIMKEN KOYO NTN NKE TRULOC Needle Rollers Taper Rollers Rod Ends Oil Filled Bushes Loose Balls O Rings Grease Plain Thrust

 

As above or the Bay of Fleas is awash with O ring suppliers

 

just bought a massive box from a motor facter £10 assorted up to 48mm inside dia

 

i'm not helping am I..

 

what about the gay boxer wanted beat around the ring ??????





eh?











eh?

 

give spen bearings a call. they'll sort you out and they're just down the road. moor bottom, cleckheaton.

 

Plumbers merchants.

 

Have a look here

O-Rings - Viton, NBR, HNBR, EPDM, PTFE, Neoprene, Silicone & Kalrez Rubber

 

I use these, very good indeed.
Steve

 

+1 for Polymax

As it's for the fuel cap, make sure you get a Viton ring.

 

Doesn't an o ring that comes in contact with fuel have to be made of Nitrile rubber? because ordinary rubber will degrade if left in constant contact.
I'm pretty sure because I had to get O E Nitrile for the fuel tap on my Honda XR400R

 

As a generalization for petrol use:

Rubber = Bad
Nitrile = Good
Viton = Better but more expensive

 

Correct me if I'm wrong, but isn't Viton the stuff which is made mainly of fluorine? And which if overheated decomposes into hydrogen fluoride, which is very nasty stuff indeed?

 

There is certainly high percentage of fluorine in Viton and it my well degrade into HF (can't say I've seen a reference to this) and of course aqueous HF is particularly aggressive. However nitrile is generally rated to 120°C and Viton to 200°C

Bare in mind the OP was talking about a filler cap.

If your worried about about Viton best remove the OEM seals from your bike sharpish