There are two different size clutch O rings?

1200ts

1200ts

Hero member
Location
USA - Riverside CA
Is it true that there are two different sizes of the clutch O ring? 30 and I think 31 mm? Do they use the same size O ring or different? What are the dimensions of the O ring and when did the change take place?

Both my 1200TS and RGS are starting to leak and also want to get a spare for the SFC1000. I would like to have to O rings in hand before taking it all apart.

Plates on head stock:

1200TS made in July of 1981
RGS made in May of 1983
SFC1000 made in February 1988

So what size do I need?
 
I think they are cheap enough to just order both and use the one you need, if you don't want to take apart and measure. My understanding was RGS of any year could be either, not sure about the 180s.
 
henrywillms said:
. My understanding was RGS of any year could be either, not sure about the 180s.
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Really...? Spose I will find out soon enough..... just put a 31mm in mine! Bled up no problemo must of fluked it.
With some help from parts book :o
 
If I'm not mistaken, there are actually 3 sizes, 30, 31 and 34mm.  :D

Look inside to see wot you've got.  Engrave it on the inside of the cover for future reference.

piet
 
sfcpiet said:
They break.  Just as much a pita.

piet
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No, you change it. Burn your hands, get the skin off your knuckles but you don't ruin your holidays.
You can even ride from Terra del Fuego to Alaska.

I broke 2 clutch cables in 30 years.
Got at least 2 leaky seals in ten years 3CL ownership.

Paul
 
Paul Marx said:
No, you change it. Burn your hands, get the skin off your knuckles but you don't ruin your holidays.
You can even ride from Terra del Fuego to Alaska.

I broke 2 clutch cables in 30 years.
Got at least 2 leaky seals in ten years 3CL ownership.

Paul
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Yeah... changed the last one in 40? heat half-way up the Passo Giovo on a SF3, stock standard with airbox.  No way riding over there without a clutch, no room for nothing between airbox and starter motor.  Took over a fucking hour without the special factory spanner.  A royal pain in the arse, was about to roll the fucker into a gorge...

Took me less than 1/2 hour last weekend to replace the o-ring in my RGS when I discovered the clutch had emptied itself, no special tools required, didn't even bother to use the vacuum pump to bleed the system.  Second time since 1999, 70000km.  500 has broken 3 clutch cables in 50000km, GTL, 2 in 60000, 3C, 1 in 150000.  Track record for hydraulics isn't bad at all.

piet
 
sfcpiet said:
Yeah... changed the last one in 40? heat half-way up the Passo Giovo on a SF3, stock standard with airbox.  No way riding over there without a clutch, no room for nothing between airbox and starter motor.  Took over a fucking hour without the special factory spanner.  A royal pain in the arse, was about to roll the fucker into a gorge...

Took me less than 1/2 hour last weekend to replace the o-ring in my RGS when I discovered the clutch had emptied itself, no special tools required, didn't even bother to use the vacuum pump to bleed the system.  Second time since 1999, 70000km.  500 has broken 3 clutch cables in 50000km, GTL, 2 in 60000, 3C, 1 in 150000.  Track record for hydraulics isn't bad at all.

piet
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Did you change the RGS O ring half way up the Passo Giovo in 40?C?

Paul
 
Paul Marx said:
Did you change the RGS O ring half way up the Passo Giovo in 40?C?

Paul
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Point is, the hydraulics are far more accessable and therefore easier to work on.

piet
 
"If I'm not mistaken, there are actually 3 sizes, 30, 31 and 34mm." (quote from Piet)

this may be my once in a lifetime chance to actually correct you here Piet, the first size hydraulic clutch slave piston was 35mm not as you state 34mm. I have never seen one other than on 1200 Anniversaries (3 off ) but they may have been used on others, no way of telling, surely do agree though, that the common ones are 30mm or 31mm, and IMHO that applies to 180's someone has also said it applies to 120's, but not sure on that that.

After 40 years of ownership of TOG (series 1 1200TS) and many changes and mods over the years, some good some a disaster,I have finally got the lightest of clutches, so light that you can lift the plates just by blowing at the lever, well not quite, it is a 31mm slave and a master cylinder with adjustable span from a 748, needs to be pulled to be believed, as witnessed by Simon (LVV editor) and Hamish (44 years a 3CE owner) at our pub meet two weeks ago, both Hamish and Simons bikes are virtually identical in clutch respect, both with cables, but the two are very different in the power needed to lift the plates, both of them very heavy, but I wont say which is the best of the two.
CLEM
 
Paul Marx said:
Point is, hydraulics is Visa card cell phone satellites breakdown insurance biking.

Paul
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Spare o-ring takes up a lot less space than a spare cable, fluid can be sourced at any service station, well, most.  No need for  any sort of insurance, carrying an o-ring in the tool pouch is usually insurance enough.  I'm no longer member of the ADAC, Germanys' largest automobile assosiation and reputedly the largest club in the world with over 21 million members, simply because I've always been able to help myself.  Fed up of relying on others anyway, I don't think no stinkin' cable or o-ring is gonna scare me. :D

So be it Clem, 35mm it is.  1200 Anniversary, wasn't entirely sure, but quite positive it was considerably larger than the later types.

piet
 
Don't worry, it's just that I prefer to remedy things immediately and not have to start looking for a petrol station in deepest wherever where I like to ride. There's no petrol stations left anyway, only automatic pumps.

My spare cable doesn't take up any space, it's fixed to the cable in use.

I already usually end up with engine oil all over my clothes in my saddlebags, don't want hydraulic fluid.

Paul
 
CLEMTOG said:
After 40 years of ownership of TOG (series 1 1200TS) and many changes and mods over the years, some good some a disaster,I have finally got the lightest of clutches, so light that you can lift the plates just by blowing at the lever, well not quite, it is a 31mm slave and a master cylinder with adjustable span from a 748, needs to be pulled to be believed, as witnessed by Simon (LVV editor) and Hamish (44 years a 3CE owner) at our pub meet two weeks ago, both Hamish and Simons bikes are virtually identical in clutch respect, both with cables, but the two are very different in the power needed to lift the plates, both of them very heavy, but I wont say which is the best of the two.
CLEM
Click to expand...

Mine would be heavier than yours is, now, if it a broken cable, Clem.
 
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