Fork Seal Leak - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 35 (permalink) Old 05-31-2015, 06:29 AM Thread Starter
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Fork Seal Leak

After having a brag about reaching 100,000 kilometers on my 2007 Bonneville T100, https://www.triumphrat.net/twins-talk...100-000-a.html, I have since noticed it now has developed a slight oil leak from one of the forks.


Referring to the OEM parts book I have on pdf that lists everything for Bonnevilles and T100's up to the year 2010, the fork seal I need is Triumph part number T2047108.

According to the OEM parts list, it seems they all used the same oil seal from the 2001 Hinckley Bonnie until about then. The only change being the front forks which have changed from engine number 343765 in F2 and 342439 in F4, but according to the parts list the same seal fits both type of forks.


Decided to verify with World Of Triumph as they have a good parts listing. There info confirms all of this. According to them same fork seal fits all Bonnies and T100's both carbed and EFI until engine number 380776, presumably sometime after 2010, when the fork seal number changes.
However World of Triumph do not use Triumph part numbers, they use their own numbering system and the oil seal number for my application is PFKL 1204746.


Checking some more through Hermys, they too have diagrams and use the Triumph part numbers but list parts and fork oil seals according to model year. They list year 2007 as an EFI model (which they aint) and having seal T2047115 from 2006 until 2014 . According to Hermys, 2005 and earlier Bonnevilles and T100's, use seal T2047108.


And SE Bonnies use a different seal again, part number T2044161.


Hermys fork seal numbers are at odds with the parts list I have and World Of Triumph.


As far as I know the fork inner tubes are 41mm for all Bonneville models, so am not sure what the seal change would be. Maybe it's the seal recess in the outer tube that has changed resulting in different seal outside diameters. It would seem that Triumph have used both Showa and Kayaba forks.


So the question is- should I be using T2047108 or T2047115 for my 2007 T100? And what is the difference between the two?

2007 Tuxedo T100.
Dom Tourers, TTP breathe, DNA filter,baffle gone, 40/140/1 shim 3 turns, TTP igniter tune, Hagon Nitros, Thruxton Bars, Halcyon bar end mirrors, Pingel fuel valve, Monza gas cap, Burton seat, Avon Roadriders

Last edited by bonza; 05-31-2015 at 06:32 AM.
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post #2 of 35 (permalink) Old 05-31-2015, 07:27 AM
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THERE ARE BETTER FORK SEALS OUT HERE, search the web. Also gaiter your forks once installed. New Bonneville, Bella Corse etc. have good gaiters or check the forum for the best recommended.
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post #3 of 35 (permalink) Old 05-31-2015, 10:18 AM
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All Balls makes quality fork seals and gaskets. I pretty much seek them out. Probably cost you less than Triumph parts too.
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post #4 of 35 (permalink) Old 05-31-2015, 10:56 AM
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Quote:
Originally Posted by vitesse View Post
THERE ARE BETTER FORK SEALS OUT HERE, search the web. Also gaiter your forks once installed. New Bonneville, Bella Corse etc. have good gaiters or check the forum for the best recommended.
From many reports here, OEM gaiters are cheaper in the long run.

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post #5 of 35 (permalink) Old 05-31-2015, 10:50 PM
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From many reports here, OEM gaiters are cheaper in the long run.
The ones on my Scrambler lasted ages, but I put some Bella Corse ones on my 06 Black, they were very thick and supple, again they last for years. So I guess it's pays yer monies ya takes yer chances.
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post #6 of 35 (permalink) Old 06-01-2015, 06:24 AM Thread Starter
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I hear what you are all saying, but dont want gaitors and seeing the OEM seals have done well just want to know which part number is correct and if anyone knows the difference between the two

T2047108 or T2047115?

I'm sort of backing it's the former

2007 Tuxedo T100.
Dom Tourers, TTP breathe, DNA filter,baffle gone, 40/140/1 shim 3 turns, TTP igniter tune, Hagon Nitros, Thruxton Bars, Halcyon bar end mirrors, Pingel fuel valve, Monza gas cap, Burton seat, Avon Roadriders
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post #7 of 35 (permalink) Old 06-01-2015, 08:20 AM
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G'day, not a fan of gaiters, had them on my 2001 for a few years then one day just mucking around I twisted one of the gaiters and water started dripping out. Cut them off and found the dust seals had rusted, so no gaiters for me ever again.
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post #8 of 35 (permalink) Old 06-01-2015, 08:30 AM
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Who's your seal

Quote:
Originally Posted by bonza View Post
I hear what you are all saying, but dont want gaitors and seeing the OEM seals have done well just want to know which part number is correct and if anyone knows the difference between the two

T2047108 or T2047115?

I'm sort of backing it's the former
Bonza,

My search on Hermy's shows the T2047115 as the seal listed for your year. However when the fitment application screen is brought up it shows carb models up to 2005, and then EFI 2006 and later. Of course we know EFI didn't start until some time in 2008. I have spoken with Herm Baver, the owner of Hermy's, and he is aware of the errors in his system and is trying to resolve them.
The good thing about Hermy's is they deliver quick, and will make it right if the product is wrong. They are my parts supplier of choice.
Of course they are a little out of the way for you, and I have no idea of shipping times to Melbourne.

Good luck,
Charles
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post #9 of 35 (permalink) Old 06-01-2015, 09:24 PM
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Quote:
Originally Posted by dustydog View Post
G'day, not a fan of gaiters, had them on my 2001 for a few years then one day just mucking around I twisted one of the gaiters and water started dripping out. Cut them off and found the dust seals had rusted, so no gaiters for me ever again.
Pete.
Pete, not sure of the brand of gaiter that you had… but the Triumph gaiters have two weep holes in them… that a lot of people don't notice, btw… if you orient them the correct way… towards the low point on the back side of the fork… you'll never get any moisture/water build up in them. I've had mine for years and never a problem...
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post #10 of 35 (permalink) Old 06-01-2015, 09:36 PM
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Quote:
Originally Posted by bonza View Post
After having a brag about reaching 100,000 kilometers on my 2007 Bonneville T100, https://www.triumphrat.net/twins-talk...100-000-a.html, I have since noticed it now has developed a slight oil leak from one of the forks.
[/FONT]
Bonza… check you PM's… I sent you one…

BTW… your 100k kilometers??? Childs play man… 102k MILES on my '03… =;-)

Just poking man… good show on the mileage (kilometerage ??)...
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