Author Topic: Clutch and shock absorber problems  (Read 9843 times)

Offline sprint

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Re: Clutch and shock absorber problems
« Reply #45 on: 10.07. 2013 18:16 »
HI Andy,
The two sleeves I showed in the photos posted are from my current RGS and the  other A10 in for rebuild
I also had my own A10 SR apart a few weeks ago to lower the gearing a bit for the trip to the Swiss Alps
(another story I must post about) I know that I checked the sleeves and they all are 8mm

Have you tried Yeomans, C&D Autos, Vale Onslows or http://www.owensmotorcycles.co.uk/Index.html


Regards
John




Have found a S/H one with 8 mm lip which should arrive on Friday. Still not sure though if the 4/5 mm gap from the back of the clutch adapter to the sliding plate is correct?

Andy


Online trevinoz

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Re: Clutch and shock absorber problems
« Reply #46 on: 10.07. 2013 22:52 »
Andy,
             Triumph sleeves will not fit as they have a different taper.

Trev.

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Re: Clutch and shock absorber problems
« Reply #47 on: 11.07. 2013 00:31 »
HI Andy

""Can anybody advise if this clutch adapter with thrust washer and chainwheel that are used on the pre-unit Triumphs will also fit the BSA Super Rocket mainshaft which look to be the same as SRM supply""?

Along with Trevs comment Triumph adaptors do not have tha scroll at the back

SRM's product is unique to them as far as I know, when it comes to BSA knowledge they are at the top of the top league, if ever there is a problem with their products they stand over them
Crap products can be got anywhere *ex* *ex*
SRM's may cost a few quid more but you can be confident of quality and fit
Knowing this saves me an awful lot of hassle and unessary grief when repairing customer bikes

Regards
John
1961 Super Rocket
1963 RGS (ongoing)

Offline sprint

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Re: Clutch and shock absorber problems
« Reply #48 on: 11.07. 2013 13:25 »
HI Andy

""Can anybody advise if this clutch adapter with thrust washer and chainwheel that are used on the pre-unit Triumphs will also fit the BSA Super Rocket mainshaft which look to be the same as SRM supply""?

Along with Trevs comment Triumph adaptors do not have tha scroll at the back

SRM's product is unique to them as far as I know, when it comes to BSA knowledge they are at the top of the top league, if ever there is a problem with their products they stand over them
Crap products can be got anywhere *ex* *ex*
SRM's may cost a few quid more but you can be confident of quality and fit
Knowing this saves me an awful lot of hassle and unessary grief when repairing customer bikes

Regards
John


Thanks Trev and John for your replies.

Have spoken to SRM and they have advised that the taper is different between the Triumph and BSA versions. Pity because the UK made Harris Triumph versions would be exactly the same apart from the taper and half the price?

The SRM ones also do not have the scroll cut into the rear shoulder. They claim it to be of no use, which when you look at the design with a large gap between the shoulder and the aperture in the sliding plate the scroll is not really doing a lot as you need it to be a fairly close fitting between the two surfaces.

Instead the adapter shoulder has a smooth finish and they use a thick felt washer of about 5 mm thick, which compresses between the back face of the adapter and the face of the sliding plate, not ideal but can't be any worse that the scroll on it's own?

They are currently out of stock of the baskets but I can get a L F Harris UK made one for a Triumph pre-unit that should be the same as I believe the bearing journal is the same on either adapter with 20 1/4" rollers? Much prefer to use a UK made part than a foreign made ones which a lot of the dealers stock and Harris parts are generally good?

Online bsa-bill

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Re: Clutch and shock absorber problems
« Reply #49 on: 11.07. 2013 16:53 »
Quote
Instead the adapter shoulder has a smooth finish and they use a thick felt washer of about 5 mm thick, which compresses between the back face of the adapter and the face of the sliding plate,

have I misread this or is there a bit a flannel about.

The felt washer sprint is/was a BSA idea, kind of agree about the scroll though as generally seems a bit slack in there after a few hundred miles but OTOH people who bought adapters that had the scroll going the wrong way would be the best to comment
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

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Re: Clutch and shock absorber problems
« Reply #50 on: 11.07. 2013 23:26 »
HI Andy,
Some time ago I posted on how I modified the sliding plate and fitted an "X" ring seal to a groove machined into a new piece rivited into the plate, the plain centre from SRM would be ripe for this conversion
As I said before I use a cork gasket instead of the felt, the result was a so sucessful I had to add a breather to the fillercap as pressure was building up inside the case !!!!

I did a forum search on the clutch adaptor and it seems that I got involved with a lot of the discussions  *eek*
Some posts are more relavent to your situation than others but it goes to show its a fairly common problem
THere are lots more to be found using different search words

http://www.a7a10.net/forum/index.php?topic=2543.msg16406;topicseen#msg16406
http://www.a7a10.net/forum/index.php/topic,3152.0.html
http://www.a7a10.net/forum/index.php?topic=4550.msg30825;topicseen#msg30825
http://www.a7a10.net/forum/index.php?topic=3685.msg25505;topicseen#msg25505
http://www.a7a10.net/forum/index.php?topic=4928.msg33454;topicseen#msg33454
http://www.a7a10.net/forum/index.php?topic=1003.0
http://www.a7a10.net/forum/index.php?topic=5117.msg34987;topicseen#msg34987

Cheers
John
1961 Super Rocket
1963 RGS (ongoing)

Offline wilko

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Re: Clutch and shock absorber problems
« Reply #51 on: 12.07. 2013 08:33 »
I'd imagine a lipped seal would distort due to the side pressure of the adaptor being moved forward or back/ The solution to that would be having the gearbox in a permanent position and mounting a plunger type chain adjuster to the back of the chaincase?

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Re: Clutch and shock absorber problems
« Reply #52 on: 12.07. 2013 10:00 »
HI Wilko
As on the likes of the Pearson or other lipped seal conversion mine has a close metal to metal fit or bush to keep the seal and shaft concentric
HTH
John
1961 Super Rocket
1963 RGS (ongoing)

Offline muskrat

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Re: Clutch and shock absorber problems
« Reply #53 on: 12.07. 2013 10:09 »
Funny you say that Wilko. Just did a stator/rotor change on a 06 HD FXDBi. I thought the tensioner set up could be made to fit. Mounted by two 3/8" bolts through the inner cover.
I think I remember a post here where a lipped seal was used and any chain adjustment had to be taken tight and then backed off.
Cheers
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Offline sprint

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Re: Clutch and shock absorber problems
« Reply #54 on: 12.07. 2013 16:19 »
HI Andy,
Some time ago I posted on how I modified the sliding plate and fitted an "X" ring seal to a groove machined into a new piece rivited into the plate, the plain centre from SRM would be ripe for this conversion
As I said before I use a cork gasket instead of the felt, the result was a so sucessful I had to add a breather to the fillercap as pressure was building up inside the case !!!!

I did a forum search on the clutch adaptor and it seems that I got involved with a lot of the discussions  *eek*
Some posts are more relavent to your situation than others but it goes to show its a fairly common problem
THere are lots more to be found using different search words

http://www.a7a10.net/forum/index.php?topic=2543.msg16406;topicseen#msg16406
http://www.a7a10.net/forum/index.php/topic,3152.0.html
http://www.a7a10.net/forum/index.php?topic=4550.msg30825;topicseen#msg30825
http://www.a7a10.net/forum/index.php?topic=3685.msg25505;topicseen#msg25505
http://www.a7a10.net/forum/index.php?topic=4928.msg33454;topicseen#msg33454
http://www.a7a10.net/forum/index.php?topic=1003.0
http://www.a7a10.net/forum/index.php?topic=5117.msg34987;topicseen#msg34987

Cheers
John


Thanks John

I am surprised that somebody like SRM have not developed one by now?

Have not had a chance to read in great detail but it certainly looks to be a good idea. However, for me I do not have the workshop facilities to undertake such a modification which in any event could result in many more weeks off the road to implement?

I now have the 8 mm lipped cush drive sleeve and the correct clutch basket should be here next week. Still toying with if I should fit the SRM adapter with the thrust washer, is it really a great benefit? It would loose the scroll and rely on the felt washer to stop he oil escaping, or at least slow it down?

Has anybody had experience of using the felt washer between the adapter and the sliding plate? The sliding plate has 4 raised rivets do/will they not simply tear the felt washer to pieces in a very short time?

Offline sprint

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Re: Clutch and shock absorber problems
« Reply #55 on: 16.07. 2013 14:02 »
Well I hopefully now have all the correct parts so that it can go back together once I have sorted the gearbox bearings?

Unfortunately SRM don't have any of their crank nuts for a couple of weeks, so  I will have to assemble with the original one with plenty of loctite and a split pin, which was missing previously.


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Re: Clutch and shock absorber problems
« Reply #56 on: 16.07. 2013 20:36 »
Quote
and a split pin, which was missing previously.

oh yes the proverbial disappearing pin, one of life's great mystery's
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

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Re: Clutch and shock absorber problems
« Reply #57 on: 16.07. 2013 21:20 »
Quote
and a split pin, which was missing previously.

oh yes the proverbial disappearing pin, one of life's great mystery's
And extremely difficult to find a new one! Mine came with a piece of stripped electrical wire to secure the crank nut....
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Offline sprint

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Re: Clutch and shock absorber problems
« Reply #58 on: 17.07. 2013 08:49 »
Quote
and a split pin, which was missing previously.

oh yes the proverbial disappearing pin, one of life's great mystery's
And extremely difficult to find a new one! Mine came with a piece of stripped electrical wire to secure the crank nut....

Probably a lot easier to fit than the split pin!

Offline Topdad

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Re: Clutch and shock absorber problems
« Reply #59 on: 17.07. 2013 10:28 »
Just looked at your parts and have got to ask what type of washer that is also where does it go I can't remember having one on mine , Oh s*** I feel a job coming on, if it's important that is ,BobH
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