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fuel tank cap sealing rubbers

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fuel tank cap sealing rubbers

Post  piston 197 on Thu Feb 11, 2016 7:58 pm

At the Bristol show I mentioned I had 4 new old stock rubbers as used on the tank caps on Cruiser 80,84,89, Falcon 87 and some Plovers which use the push in cap. Having distributed these to members who were experiencing poor sealing/loose cap syndrome, I was contacted by 2 recipients who told me that the new rubbers were no better than their existing ones and still did not seal ! I suggested they soak the rubbers in petrol overnight and try them again , Eureka! the rubber expanded and now sealed, so if your cap has been sitting in a dry tank and is loose it might be worth trying this trick ? Once the bike is being used the rubbers will have petrol splashed liberally about them they should still stay swollen ?
I am investigating getting this item made, but it will be some time before any are ready
JH
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fuel tank rubbers

Post  Cruiser Ron on Fri Feb 12, 2016 4:31 pm

If you have some made will you let the members know via the forum please.

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tank sealing rubbers

Post  piston 197 on Fri Feb 12, 2016 4:45 pm

Yes of course !
JH
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Re: fuel tank cap sealing rubbers

Post  peter@dunfordconstruction on Tue Feb 16, 2016 9:48 am

Dear John,

If you have some made please would you get me 2 no?


Regards

Peter

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fuel rubber update

Post  piston 197 on Tue Feb 23, 2016 6:43 pm

Took a new old stock sealing ring, a petrol tank and a petrol cap to Vic Gardner Rubber today, and instructed him to go ahead with a mould and some samples, he suggested using a different colour for the sealing ring ( red or blue) to distinguish between new items and originals ? not a bad idea as they are out of sight when in use !
Will report back on how it goes and costs etc.
JH
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Tank rubbers

Post  kerabo on Tue Feb 23, 2016 6:56 pm

In the meantime if you remove the rubber and wrap a circle of insulation tape round the groove and put the rubber back you will find its a better fit. Be carefull as there is a breather there somewhere.
Regards Ken
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fuel cap seals

Post  piston 197 on Thu Mar 31, 2016 1:41 pm

Mould has now been made and first seal made from it, perfect to look at, made in Ethanol proof blue rubber to differentiate from the black original non-ethanol proof ones, first attempt it is a little tight to get in/out.
Mould is now being modified to get a better fit.
Will let everyone know when they become available
JH
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fuel cap sealing do-dab.

Post  colk2004 on Thu Mar 31, 2016 7:32 pm

Thanks John. I'll be interested in a tank cap rubber soon (and the seat and tank badge ones as well). As you say it's out of sight so blue is a plan and I'm not bothered if it were pink as long as it keeps premix off the tank and out of my lap! I definitely need one as the current seal I have is about the same hardness as the cap itself!

Cheers Colin
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tank sealing rings

Post  piston 197 on Fri Apr 01, 2016 6:07 am

Will advise when available and cost, should be within the next two weeks if all goes to plan ?
JH
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First seals off the mould

Post  piston 197 on Fri Apr 01, 2016 1:58 pm

Mould has been adjusted and first few samples have been made, nice bright blue Ethanol proof rubber as used by Ford in their fuel systems.
Just need to soak a couple in petrol for 24 hours and check nothing untoward happens with the fit, then I can give the go-ahead to the manufacturer to have a batch made for retail.
This rubber is not cheap and they are likely to retail around 10 each plus post, but better than a lap full of petrol !
Will advise when tested and available for purchase .
JH
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Tank seals work !

Post  piston 197 on Mon Apr 04, 2016 6:10 pm

Have tested seals by soaking in petrol for several hours and checking fit, no discernible problems have appeared, so will now be giving the go ahead for the first batch of 50, should be ready in a week or two ?
Will advise when they are ready and cost etc.
JH
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seals on the way

Post  piston 197 on Tue Apr 05, 2016 11:32 am

First batch ordered , will be available in 7/10 days, will retail @ 12 each ( ouch) plus post, at that price the first 50 sold will pay for the mould !, the Ethanol proof rubber is twice the price of the rubber I use for the badge rubbers, horn grommets and seat bungs,
Will post on here when they are ready for sale .

JH
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tank seals

Post  piston 197 on Thu Apr 21, 2016 4:42 pm

Tank seals now available, cost 12 each plus 1.20p postage, have soaked them in petrol and tried in a variety of tanks and all good !
They are in a bright blue ethanol proof rubber grade used by the motor manufacturers trade to combat modern fuels destructive properties.

They fit
Falcon 87
Cruiser 80
cruiser 84
cruiser 89

And presumably the Plover 73/78 with the push in plastic cap and the James Cadet/comet equivalents, but have yet to try it on this type of filler ?

JH
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Tank Cap Rubbers

Post  peter@dunfordconstruction on Fri Apr 22, 2016 6:57 pm

Hi John

Please could you send me 4No Tank Rubbers

Also do know anyone who has a picture & sizes of the original Trials 83/5 & 92 Rear number plate & Bracket fixings & rear Q/D lamp type?

Peter

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P.M. Sent

Post  piston 197 on Fri Apr 22, 2016 7:11 pm

Peter have sent you a p.m.

John H
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Re: fuel tank cap sealing rubbers

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