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Post by gixxerrob on Mar 21, 2009 12:41:16 GMT
Hi all, I need some help.
I have just taken the the rear swing arm off and found that the right hand side swing arm bearing was totally dead. roller cage rusted through and rollers sitting in a fair bit of rust dust.
Anyway i have since checked the suspension linkage needle bearings and found a least tow others on the way out. I am having difficulty getting the frame mount bolt out but that is another matter.
what i am after is some parts fiche diagrams with Yamaha part numbers, does anyone have them electronically ? Or can any one tell me the part numbers of all the bearings in the suspension linkage.
Cheers
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Post by CD on Mar 23, 2009 22:24:19 GMT
The main swing arm bearings are standard off the shelf parts much cheaper from a bearings dealer. The needle rollers are allegedly Yamaha only but if you read off the code (etched onto the end) to a bearings specialist you never know. Where the rocker casting has two bearings you might want to fit a grease nipple to the gap between the bearings. Mine were full of water when I last looked. :-( Alternatively... diversionclub.proboards74.com/index.cgi?board=600&action=display&thread=2621 |
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Post by gixxerrob on Mar 24, 2009 9:43:24 GMT
Hi There, thanks for the reply.
The swing arm bearings are not a problem to source as you say. They are in the post as I type. It is the linkage bearing numbers that I am after.
The link you posted was for a XJ600 are the bearings the same ?
As I am after XJ900 part numbers.
I have since found both the Yamaha part and Koto bearing number for the bearing that there is four of in the linkage setup.
It is Yamaha Part number: 93317-41761
Koyo Bearing number: BHKM1730JU
Size: 17x24x30
Type: SEALED
Four down 2 different bearings to go..
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Post by teejayexc on Mar 24, 2009 13:28:10 GMT
Hi Rob, if you send me a pm with your e-mail addy, I can forward you a parts fische for the 900.
It's in pdf format and is a rather large file if your interested.
regards, Trev
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Post by CD on Mar 24, 2009 16:08:43 GMT
Sorry, I should have read it properly. The bearings are mega costly from Yamaha (like £100+ for the set) and I'm told not available otherwise, but do check them out. They are not all the same size. There are bearings in the roller bushes in the rocker unit and under the swing arm. Total of 6 needle rollers plus the swing arm bearings.
Alternatively you could fit some standard self lubricating "oilite" bushes and have new spindle "tubes"made up. Almost certainly less costly that Yamaha parts and they will last longer.
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Post by gixxerrob on Mar 24, 2009 20:42:14 GMT
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Post by CD on Mar 24, 2009 21:51:08 GMT
That term "sealed" is a bit of a joke. They have seal lips on the outer cages but the inner "shaft" is a length of plain steel with a hole through for the mounting bolt. Last weekend, on my 900 they were all wet inside with the grease emulsified especially the middle pair on the rocker unit. I must get a grease nipple fitted to that one and maybe on the swing arm underside, but sadly its not possible for the single bearing bushes.
The 900 uses those and a BHKM2035JUU 27mm OD 20mm ID. I forgot to measure the length. :-(
Regarding water ingress... some thin, large diameter stainless washers on either end of the mounting bolts would help to deflect water away from the seals.
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Post by gixxerrob on Mar 25, 2009 7:21:34 GMT
Good idea CD about the stainless washers, I will do that.
The length is 35mm for the BHKM2035JUU. I am having trouble finding that one on the net but I will be ringing a couple of bearing shops today.
I still don't know what the other cylindrical bearing where the relay (rocker) arm mounts on the frame is. My bolt is seized in the sleeve. I am hoping a bike bearing shop might.
Fingers crossed. will let you all know.
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Post by CD on Mar 25, 2009 9:46:59 GMT
I believe it's another 27-20-30 Maybe you have already tried this but here's an idea... With bike on centre stand - Get a friend to hold a socket and long extension bar on the bolt head with a very heavy hammer head against the end of the extension bar. A big sledge hammer is good! A deep socket is best, but an ordinary one will do. With a suitable drift bar whack the bolt thread from the other side with a 4 pound lump hammer. The mass of the sledge hammer holding the fixed socket will stop the frame lug moving and all your hammer force will go into driving the offending bolt. Once it moves the bolt will quickly hit the back socket, but it should (?) then be free enough to drift out normally. Sometimes with these jobs, the threaded end is long enough to use an extension bar as a drift with the square drive socket end over the threads so it cant slip off. Sorry if you've already tried this. The biggest issue with all of these bearings are the central sleeves. They run into the needle rollers so have a ground polished finish and any wear will ruin the new rollers. Maybe its these sleeves that ramp up the costs as they will have to be Yamaha spares. If you were to have some made by a machine shop it would be cheaper to have a plain finish sleeves made in suitable diameters to use self lubricating bushes instead of roller bearings. DX sleeves would be more suitable as the shafts only oscillate a few degrees - hardly enough to move the grease in needle rollers. By DX bearings I mean these things www.bearingboys.co.uk/DX_Plain_Split_Bushes-1629-c. They dont need to be reamed smooth and even have a grease hole, so with grease nipples fitted they'll never need doing again. |
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Post by gixxerrob on Mar 27, 2009 10:36:44 GMT
Thanks for the ideas.
I got the bolt out. Bigger hammer with a copper headed hammer in between to minimise damage to the thread.
The details of one of the last unknowns:
Yamaha:Part number:
Koyo part number: BHKM2035JUU
Size: 20x27x35
Type : non sealed
Still waiting on the bearing shop to hear back about this one and the other bearing.
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Post by CD on Mar 27, 2009 13:50:11 GMT
Well done, sorry if the above was grannies & eggs stuff.
Same caveat here -
If your pivot "pins" are at all scored dont bother using them as the rollers will soon fail. I'm sure some specially machined up large enough for DX bearings will be cheaper overall. They will need a smooth finish but a full-on ground finish probably not necessary.
DX bushes are quite soft. I dunno, but they might even work with alumimium alloy pins (less unsprung weight). Maybe someone knows something more about them.
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Post by gixxerrob on Apr 9, 2009 10:37:19 GMT
Hi all, I have all the sizes, Yamaha & manufacture part numbers now. These are all the bearings in the suspension linkage including the two on the swing arm. 4 of Yamaha Part number: 93317-41761 Koyo Bearing number: BHKM1730JU Size: 17x24x30mm Type: SEALED 1 of Yamaha Part number: 93317-31771 IKO Bearing number: TA1720Z Size: 17x24x20mm Type: SEALED 1 of Yamaha Part number: 93317-42060 Koyo part number: BHKM2035JUU Size: 20x27x35mm Type : non sealed All but the last can be purchased from shop.marksman-ind.com for much less (less than half) than from Yamaha. I say the last cannot be purchased from them as I am still waiting for them to get back to me. Their communication is not very good at all but the prices are  I gave up waiting and bought it from Yamaha. I will add this info to a parts diagram if anyone is interested. Cheers |
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Post by CD on Apr 9, 2009 11:09:42 GMT
Well done and really handy stuff. The front bearings on my suspension rocker are worn. A pal of mine has copied a page from the Buck and Hickman catalogue containing the DX bearings. It also has some self aligning spherical DX bushes that look similar proportions to the needle rollers used on the bike and might even be a direct replacement. The big advantage (apart from cost) - they work with minimal lubrication and come with grease holes. If the suspension rocker is drilled for grease nipples the DX bearings will probably last for ever. This illustrates what I mean (with many pages of the things) though other suppliers might be cheaper. www.buckandhickman.com/find/keyword-is-plain+bearings |
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Post by Padster on Apr 24, 2009 6:46:25 GMT
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kelv
Newbie
Posts: 2
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Post by kelv on Apr 26, 2011 16:41:02 GMT
Thanks Gixxerrob for these post's, made my life much easier reconditioning my swinging arm. Did you ever get any joy on the BHKM2035JUU bearing? This Topic should be Pinned  |
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Post by muckerboy2205 on May 13, 2011 12:03:45 GMT
Hi Dude if you go on to the Gilera web site you can find a complete listing on the diversion .
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Post by donnyden on Sept 2, 2011 20:56:36 GMT
I've just stripped the rear suspension on my 900 and found the front linkage bearing siezed.
I used the part number to search online and came up with this. Yamaha XJR1300 Suspension Bearing 93317-42060 on ebay. Cost me just £31.97 including delivery and it also include the bush as well part number 90387-100T8, which was handy as the old one was badly rusted also. The bearing alone was also listed at £19.50.
So maybe one for the tips section, don't just search for the XJ, find the part number and search for that. I think this part is also used on the Fazer 1000.
I did the same for a rear brake caliper seal kit and found a genuine Yamaha kit for £15.70 delivered.
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