BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike Sponsor SteadfastCyclesBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorHepolite PistonsBritBike Sponsor
Upgrade to: Gold Membership | Premium Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
No Name Man
No Name Man
SE Ohio
Posts: 1,463
Joined: August 2006
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
a word from..
Manuals on DVD (Shipping included)
Previous Thread
Next Thread
Print Thread
Rate Thread
1976 t140 fork seals
#143303 06/21/08 9:54 pm
Joined: Apr 2007
Posts: 200
Britbike forum member
OP Offline
Britbike forum member
Joined: Apr 2007
Posts: 200
Im replacing the fork seals on my 76 Bonny the new seals Ive got are thicker than the originals on the originals there was a cover plate over the seal with the new seals they come right up top the lip of the tube and there is no room for the cover plates , I dont see these plates in the parts book but they look original Thanks Peter

Support Your #1 BritBike Forum!

Check out British motorcycles for sale: British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Re: 1976 t140 fork seals
#143304 06/21/08 10:14 pm
Joined: Mar 2006
Posts: 4,370
Likes: 6
Britbike forum member
Online Content
Britbike forum member
Joined: Mar 2006
Posts: 4,370
Likes: 6
Quote
Originally posted by peter berry:
I dont see these plates in the parts book but they look original
The 97-7010 seals with retaining washers were used 1978-on, but can be fitted to the earlier OIF model forks, which is probably what you found installed? They are soft seals and when installed there ought to be a gap between the seal and the retainer?

How deep are the new seals? Were they supplied (or did you order them) under any specific part number? As the original '76 seal part number would have been 97-4001.

Re: 1976 t140 fork seals
#143305 06/21/08 11:15 pm
Joined: Apr 2007
Posts: 200
Britbike forum member
OP Offline
Britbike forum member
Joined: Apr 2007
Posts: 200
The bike must have had the newer seals the ones I am replacing with are the 97-4001s so should be OK Thanks

Re: 1976 t140 fork seals
#143306 06/21/08 11:28 pm
Joined: Apr 2006
Posts: 1,704
Britbike forum member
Offline
Britbike forum member
Joined: Apr 2006
Posts: 1,704
I believe the factory used those metal rings when they started using "Leak Proof" seals.
I don't use the metal rings or the Leak Proof seals.
Leak Proofs seem to have more stiction and don't work any better.

>>sb


Stop the insanity.
Re: 1976 t140 fork seals
#143307 06/22/08 3:54 pm
Joined: Aug 2005
Posts: 1,208
Britbike forum member
Offline
Britbike forum member
Joined: Aug 2005
Posts: 1,208
I put Leakproof seals on my 79 T140D and they work great. The trick seems to be the gap between the seal and the ring.
Just my 2c


Steve in Tulsa
Re: 1976 t140 fork seals
#143308 06/23/08 12:06 am
Joined: Feb 2008
Posts: 163
Britbike forum member
Offline
Britbike forum member
Joined: Feb 2008
Posts: 163
i ran into the exact same thing on my 76. that ring is not in the parts book for the 76 and was a upgrade done later. you can replace it with either kinds of seals but i suggest getting the leakproof. they get a little tricky because they "float" between the bezel of the fork leg and that ring. the originals dont float but are a snug fit into the top of the fork leg.


76 T140V
79 Honda CB 650
79 Yamaha 175 Enduro
68 Chevy Impala Convert
- - - - - - - - - - - - - - - - -
Re: 1976 t140 fork seals
#143309 06/25/08 12:39 am
Joined: Jun 2002
Posts: 10,045
Britbike forum member
Offline
Britbike forum member
Joined: Jun 2002
Posts: 10,045
Hi Peter,

Another vote for the later ("leakproof") seals.

Quote
Originally posted by SBoyd:
Leak Proofs seem to have more stiction and don't work any better.
Fwiw, I never noticed any more stiction on the T160's forks when I swapped 'em to Leakproofs, but the Progressive Suspension replacement for the damper top 'O'-ring does reduce stiction.

As for "don't work any better", original-type seals on the T160's were a nightmare; the left on in particular never lasting very long - I put that down to the fork twist induced under braking by the single caliper. Certainly, since I fitted twin front calipers along with the Leakproof seals, I've never had any more trouble. wink

Hth.

Regards,

Re: 1976 t140 fork seals
#143310 06/25/08 2:28 am
Joined: Apr 2006
Posts: 1,704
Britbike forum member
Offline
Britbike forum member
Joined: Apr 2006
Posts: 1,704
Peter and Stuart,

The only job that the fork seal has to do is to keep the oil inside. Whilst doing so, it should introduce minimal stiction.

My experience the past few years is that the modern replacement 97-4001 (half the price of Leakproof) from my local dealer (M&S Cycle)
does not leak. (Maybe distributed by EMGO?)
And you don't have to deal with the metal ring.
smile

>>sb


Stop the insanity.

Moderated by  John Healy 

Link Copied to Clipboard
Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | DVD- Manuals & Parts books
Upgrade to: Gold Membership | Premium Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.7.4