Has anyone ever replaced the mounts/bushes on the Showa rear shocks? Mine are well past their sell by date and I've pushed them out with no bother but I'm struggling to find a part to replace them. The Haynes manual suggests that the Showa shock mounts aren't replaceable, like the later 900 SS ie. shocks but this seems like it should be a fairly standard part? Could anyone point me in the right direction? Also, is the upgrade to the 900 SS ie shock from the older Showa really that much of an improvement in performance? Cheers
There are a couple of threads on this subject....this is one of them.....http://ducatiforum.co.uk/f41/rear-shock-10811/#post165784 .........Gaz92 found the Showa bearing sizes.........if you can find the bearings, they are easy enough to do. The IE shock being about 15mm longer will effectively raise the rear and the bike will steer quicker.........virtually the same as pushing the front forks up through the yoke more..... .........you can also achieve it by changing the front tyre to the 750SS 60 profile (you should have a 70 profile). Depending on what shock you find, make sure it is compatible with the swingarm........see this thread..... http://ducatiforum.co.uk/f4/swingarm-rear-shock-warning-11396/ AL
In one of the threads, Gaz92 appears to have found them, but I think they are the plain type that require greasing.........the ones in the carbed SS Sachs Boge have a bronze/teflon liner in them so lubing isn't required it seems.... When my Showa was rebuilt, like a t*t, I forgot to ask what the bearing reference numbers were! AL
replaced the spherical bearings in my rear shock was easy to do finding the bearings I thought would be a pain but local bearing supplier managed to find ones same size type and brand only had 2 suppliers in the country for them took 3 days
Come on then, reference numbers and brand..............or are you a t*t like me and didn't make a note of them? AL
Take them along to these guys sure they could find something Ball. Roller & Transmission Bearings Ltd 01463 225 956 Address: 61 Carsegate Road Inverness Inverness-Shire IV3 8EX you could phone and ask if you know the outside diameter, inside diameter and the width and tell them its a spherical ball joint
Cheers - I was planning a trip to a local supplier tomorrow if I had no results for a part number on here. Also, I've just got the Showa shock and if I'm correct, it has no spherical ball joint or top hats or anything like that - just two pivot bushes (top and bottom) consisting of an outer metal sleeve, an intermediate rubber sleeve and an inner M10 metal sleeve. For anyone searching for the spherical ball joint - part number 36610201A - the following link could help: Duc Buchse - Stein-Dinse Online-Shop However, in the parts catalogue my shock pivots/bushes have no part number.
Sorry didn't realise, I replaced the bearings on a 900ss shock a while back for a guy at work but failed to note down the numbers, they were spherical ball joints and I think he got them for £6 each.....he was very pleased
The bearings in either the Showa or the Sachs should be a ball joint into which a top hat bush is fitted either side; they aren't interchangeable between makes....... .....there are O rings under the top hat bushes in the Showas that can be replaced. The Sachs bearings are available from Ducati, but expensive..........Gaz92 sourced ones for the Showa. AL
In that case I suspect that a previous owner might have replaced the originals. The parts catalogue shows the bearings for the new style shock as a spherical ball joint with a part number but the older type shocks don't have an indication as to bearing type. In gaz92's (well drawn) photo below, the right hand page shows exactly what I have in both the top and bottom mounts, I have no top hats.
Gaz's right hand page is just showing the shock eye in elevation with everything in place.........it isn't a different bearing to his drawing on the left........ .......as far as I am aware, my Showa came off a 93 SS and it is the same as the Gaz one..........However my Sachs shock has a larger diameter eye, bearing and top hat bushes. AL
Ah I see I see - I thought the drawing on the right was minus top hats. This has me slightly more worried now as the dimensions in the top right hand drawing (10mm, 20mm and 21.8mm) are the exact same as the simple (2 metal sleeves either side of a rubber sleeve) bushes/pivots I have, which had me struggling to get my head round it. In the (LH) drawing the top hat bushes are hard up to the frame lugs with the o-rings in the 1.9mm gap. Mine is definitely not the same as this. Investigations to continue after work . . .
Ignore the outer O rings in Gaz's drawing.........they definitely aren't supposed to be there......... The proper O rings are under the top hat bushes.......... The actual bearing should be a 'spherical' type......... IE, A ball with a hole through it in an outer race.......the top hat bushes push into the hole from either side and meet in the middle, with the O rings 'trapped' under the top hats. If you look at my pics in the 'Warning' thread, you can see that the top hat bushes are just about against the frame lugs.......At the top end, it is pretty tight, but down at the ally swingarm lugs, I used shim washers to make sure 1) the shock was aligned with the top and 2) To make sure that I didn't have the ally lugs snapping off by trying to pull the gap together. The shock should be able to rotate on the bearing full travel from side to side without touching the lugs..........The smaller diameter top hat bushes on the Showa shock allows that to happen........the Sachs shock (that was fitted to the carbed SS) larger lower eye and top hat bushes hit the ally swingarm lugs before it reaches full rotational travel.....which if hitting a real hard bump, could obviously cause a problem with the lugs. I'm taking a guess that if you get a fine feeler gauge and bend a small curl in the tip and hook at the the 'rubber sleeve' you say you have, that it could well be the O rings..... Also, if you look inside the bolt hole, I reckon you will see a join running around inside.......IE, bushes.......If you can see the join, you need to be able to knock one out to be certain.......but I reckon they are the top hat bushes (20mm diameter IIRC). AL
Stew, Sorry been away with work this week and have only just seen this thread. Are you sorted. Please ask any specific questions and i will do my best to answer. One thing - the o ring on the outside Al said to ignore, he is quite right I don't think they are there in the standard set up but the bloke I bought the bike off told me he had put some there to offer a bit extra protection from water getting in. The part number in the photo - I got them from Erick but were also available from mainline bearings Leeds. I did enquire about some PTFE coated from a racing outfit but they ended up not being available in that size. Here is another link http://ducatiforum.co.uk/f41/900ss-showa-gd022-rear-shock-stuff-2605/?highlight=showa+shock If I can help with anything else let me know. Cheers Gaz
Stew. Just another bit of info: Don't know what you found but the seals in mine behind the "top hats" were a square section with slight pointy section bit in the I/D. Could not find replacement seals anywhere. Tried to find square section O ring and "X" ring but no joy. Did find a place in Sheffield that could machine a square section seal up but I did not want to pay the price I think they were about £10 each. So I decided on the O ring section that I showed in the photo AL posted for about £5 for 10 off ebay in Nitrile which after some research and hope someone can confirm is ok with grease. Cheers Gaz
yep complete tit didn't make a note must remember not to make a note to myself to remember to make a note :biggrin:
