Shock Rebuilding

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BockingBandit
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Shock Rebuilding

Post by BockingBandit »

Has anybody gone to the trouble of having a rear shock re-built?. Unfortunately,.. the oil form my SS rear shock is now decorating Andrew's (Sanbars) blockpaving drive... sorry about that woops. I've bought a standard S shock from Motorworks, .. little sorter.. so will see what that does for the 'turn-in'
Geoff
Avoiding Reality ....... http://poorcirculation.blogspot.com/
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Andrew Burt
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Shocking News

Post by Andrew Burt »

Hello Geoff,

Glad to see you got the replacement shock OK, and hope you don't have any difficulty fitting it. Don't worry about the oil patch, it wasn't my drive :D Anyway, I should imagine the difference in ride is minimal as I think you have a shortened paralever, so you should only lose a minimal amount of ride height.

Just in case you need the workshop manual, you can download at
http://www.rbracing-rsr.com/blackhole/b ... austs.html

Good luck, speak to you soon, regards

Andrew

PS, I'm not Sanbar, I go by the name "The big Banana".....don't ask!
The Big Banana
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adamski49
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Post by adamski49 »

BB

The standard shock should be longer, not shorter, than the SS shock.

As for rebuilds, ABE in Greenwich can do it for £100 plus another £50 if you need a new rod (unlikely). Apparently they do them on Wednesdays and turn-around is about a week.

If you go for it let us know how you get on.

HTH

Adam
Forgive me father for I have sinned... ex S owner moved onto pastures new with four cylinders and a chain... and back to a twin, albeit in a V.
winger

Post by winger »

There have been various length shocks,certainley pre 2000,the standard shock is shorter than the SS shock, 315mm/to the SS shock of 318mm.

Chris
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Andrew Burt
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I was wrong

Post by Andrew Burt »

They're right you know...but only by 3mm :wink:
The Big Banana
winger

Post by winger »

3mm's a lot,I originally ran mine with a standard shock on the front and a SS shock(318) on the back it was like chalk and cheese from the standard wheel barrow turning S,putting a standard shock on the back with a long shock on the front god knows what that will do to handleing.

BM have buggered about with the shock length,i think there have been both 310 and 315 with a short arm.

The original fronts(standard) were 319mm and the SS were 330mm.

Despite haveing had three different suspension set ups on my S,the lengths have stayed the same 319 front with an Ohlin set at 318,any alterations i've done since fitting e'm have been done by ajusting the Verholen para arm.

Chris
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Andrew Burt
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3mm's a lot

Post by Andrew Burt »

I've tried telling my wife that, but she's not having any of it :D

Anyway, I defer to experience. You are quite right of course, 3mm at the centre of the the radius does translate to a greater figure by the time you get the the end of the drive shaft.

You've got me thing now about shocks, my "S" has standard factory fit. I'm now interested to see the difference. I will have to see if I can borrow someone's "SS" for a blast :wink:

Regards

Andrew
The Big Banana
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BockingBandit
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Post by BockingBandit »

LoL,. so now I'm totally confused about the lengths. Anyway.. I guess if it feels odd... I'll just shift weigh between TopBox and TabkBag,.. and vice versa, .... problem solved without resorting to WD40 or Gaffer Tape
Avoiding Reality ....... http://poorcirculation.blogspot.com/
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Andrew Burt
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What about Tyre profiles?

Post by Andrew Burt »

Just been thinking (and no it didn't hurt), the SS as standard has a higher ride height because of it's longer shock and shorter torque arm, which would supposedly gives it a faster turn in! But isn't this redressed slightly by having a 5.5" wheel with it's smaller tyre wall (by 5mm) and flatter profile, which surely lowers the ride height? :shock:

Has anybody got a standard S with 5.5" rear...how does it compare to the standard 5" rear. Also, what are the ohlins shocks really like? :?
The Big Banana
winger

Post by winger »

Hi Andrew

Don't get carried away thinking that rideing the SS or for that matter any of the reps are majorly different,because all they did was made the thing taller for more ground clearance for the cylinders.

Yes, they made the rear taller, but also put a long shock in the front which means your back to square one,the cheapest way round it,is to buy a Verholen rear arm and raise the backend up.

I do most of my rideing two up,found the S steered like a bloody wheel barrow!!,so started with stock suspension,then bought a pair of SS shocks,put the pair on,still steered the same,took the front of,steered great but the tranny wasn't very happy one up,bought an Ohlin and Verholen arm and have run that set up fot some years,but in all that time have kept the stock front shock,for no other reason,means if i put the longer front Ohlin in,I've got got to raise the rear higher to get the steering back to were i want it.

All of which was done some years ago by a gent called Tony Smith he ended up with an S with a seat as high a GS!!!

Gus did his some months ago i've no doubt he'll put his sixpeneeth in.

Chris
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Post by sandbar »

winger wrote:the cheapest way round it,is to buy a Verholen rear arm and raise the backend up.
Or just buy the shorter 'sport or BCR' or GS arm from BMW for about £45. Non-adjustable but (I'm told) just about as short as the adjustable ones get to, for far less money. You might even find a second-hand one.
Andrew Burt wrote:PS, I'm not Sanbar
I'm Spartacus - oops!! sorry - Sandbar

Sandbar
www.sandbarcomposites

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Andrew Burt
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Post by Andrew Burt »

Well Chaps... Looks like I'm going to have to break into my piggy bank again :shock:

Regards

Andrew
The Big Banana
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BockingBandit
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Post by BockingBandit »

Well. I got the rear 'S' shock onto the 'SS' this afternoon,. after having to remove the exhaust system.. Thank you for that piece of engineering wizardry Mr BMW. Apart from 'Nice Yellow Spring' to 'Dull Blue Spring', ..Absolutely zero difference to the 'Turn-In' and unlike my previous 'S' I couldn't get a crankcase down, so I imagine it's either approximately the same ride height or I am getting a lot older than I thought. The handling is a lot better though, .. but I guess runing without damping wan't the best re-intorduction to the Boxer. (At least I've got an excuse for my sissy lap times at Snetterton)
Geoff :wink:
Avoiding Reality ....... http://poorcirculation.blogspot.com/
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adamski49
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Post by adamski49 »

Geoff

The only time you have to remove the exhaust to get the shock out is when an aftermarket exhaust is fitted. With the standard CAT in place the bottom nut and bolt are easily accessible. You can't really blame BMW design for that... plenty of other things, but not that :D

Adam
Forgive me father for I have sinned... ex S owner moved onto pastures new with four cylinders and a chain... and back to a twin, albeit in a V.
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BockingBandit
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Post by BockingBandit »

OK,.. I'll agree with that one Adam, ... and forgive my blasphemy. ABE will re-seal/re-fill the SS shock for £100, ... but rides lovely with the S shock.
Avoiding Reality ....... http://poorcirculation.blogspot.com/
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