Author Topic: Sliding Plate Clearance  (Read 1099 times)

Offline Ron B

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Sliding Plate Clearance
« on: 26.06. 2012 01:06 »
I don't think I have ever seen the clearance specified for the reverse thread on the clutch to the sliding plate.   Does anyone have a factory spec for this.  All my sliding plates seem to have about a 1/16"+ gap.  Just how tight should it be?  Any enlightenment will be appreciated.  Thanks Ron B.
1949 A7 Long Stroke
1950 B31 w/ M21 engine
1954 A10
1967 BMW R60/2

Online BSA_54A10

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Re: Sliding Plate Clearance
« Reply #1 on: 26.06. 2012 11:21 »
Original bolts are shouldered which sets the distance.
Well mine are in any case.
Bike Beesa
Trevor

Offline Ron B

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Re: Sliding Plate Clearance
« Reply #2 on: 26.06. 2012 20:33 »
Sorry to not state more clearly my question.  What is the clearance between the rotating reverse thread on the clutch adapter and the sliding plate?  Yes  the shouldered are there to allow the plate to move.  Ron B.
1949 A7 Long Stroke
1950 B31 w/ M21 engine
1954 A10
1967 BMW R60/2

Online bsa-bill

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Re: Sliding Plate Clearance
« Reply #3 on: 26.06. 2012 20:47 »
Hi Ron
I looked at your mail and struggled a bit but think I have it now, what you term the reverse threads is mostly called a "scroll". it's there to throw any oil on the adaptor back into the chain case, there are a number of these with the scroll going the wrong way so have a good look at it.
Clearance - I imagine it should be snug without rubbing too hard but have never heard any figures given for it

all the best  Bill
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

Online chaterlea25

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Re: Sliding Plate Clearance
« Reply #4 on: 26.06. 2012 20:53 »
Hi Ron,
Nearly all the original plates are well worn as 1/16in in your case
The pattern ones are total crap and sometimes even worse than the old worn ones  *eek*
I repair the old ones by making a new bush which I braze to the old plate,
I have also unrivited the old sliding plate centres and made new ones with either a seal or quad ring
I make them 5to 10 thou bigger than the clutch sleeve
HTH
John O R
1961 Super Rocket
1963 RGS (ongoing)

Offline Pete Gray

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Re: Sliding Plate Clearance
« Reply #5 on: 27.06. 2012 11:41 »
I did an oil seal modofication on mine - details posted here a while ago
http://www.a7a10.net/forum/index.php/topic,5117.0.html

I had been running ATF which no matter what I did including this modification was always slung out over the left hand silencer. Someone pointed out that engine oil was a better option, advice followed and no more leaking !
Trouble is it's all got to come down again as I now have a dragging clutch due to a bad bit of setting up on my part !!!

Pete

1961 Swinging arm A7
2000 BMW R1100R