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Ooops!
Aug 24, 2008 0:21:55 GMT -5
Post by StewRoss on Aug 24, 2008 0:21:55 GMT -5
Got home from the SR Club ride today and decided to take a few pics of my SRs...well all that are mobile that is...when I noticed this on the bike I rode today...   ...and this...  ...nice fatigue striations Aero...it hung on 'till the last!  More work...could have been an issue had it come out too far! We were up in the twisties for a lot of the ride...  SR  |
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lurch
Full Member
Posts: 217
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Ooops!
Aug 24, 2008 1:05:19 GMT -5
Post by lurch on Aug 24, 2008 1:05:19 GMT -5
If you didn't take any photos Stew you probably wouldn't have noticed it .
WELL DONE ;D ;D
LURCH
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Ooops!
Aug 24, 2008 2:45:29 GMT -5
Post by StewRoss on Aug 24, 2008 2:45:29 GMT -5
Yes, you're right, certainly right away for sure...the bike's in bits now. Once I clean the swing arm I'll assess the wear and probably replace the bushes and maybe the bearings while I am there as well.  Best thing is that both the new cafe racer and this bike's swing am axles came out easily! Always a good thing ;D I've also been holding off fitting the Daytona braided rear brake hose 'till I had to access the area for something else...well it's time to fit it now...  SR  |
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Ooops!
Aug 24, 2008 6:04:55 GMT -5
Post by StewRoss on Aug 24, 2008 6:04:55 GMT -5
Examination of the shaft reveals it to be a 'bodgie' part...poorly machined...I am of the opinion that it failed by fracturing through the bottom of part of the roughly machined thread.   I'll have this confirmed tomorrow. Even though it has survived for a fair while, it's a good idea to use only genuine parts for things such as these, or at least factory made ones...there'll certainly be a genuine one going in again...unless there is more 'bodgieness' to be discovered... SR  |
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dutchcool
Full Member
-1981 SR500-
Posts: 104
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Ooops!
Aug 24, 2008 16:05:13 GMT -5
Post by dutchcool on Aug 24, 2008 16:05:13 GMT -5
Why is one end of the thread much longer than the other ?
By the looks of it, the axle is made of soft material, there are marks pressed in it as a result of gripping when threading it !
Do i spot some Koni rear dampers on the bikelift? ifso i fully support that choice, but i have to say i once had trouble with one of them in my SR.
Went to the Dutch TT and in a curve i felt a weak damper, pulled aside and the right damper chrome shaft had snapped and was bent 90 degr!
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Ooops!
Aug 24, 2008 18:21:41 GMT -5
Post by fenz on Aug 24, 2008 18:21:41 GMT -5
Have to agree steel looks to be very soft.
If i ever make any axles or load bearing parts i allways use 4140 grade steel which is a medium to high tensile steel.
Its a little harder to work with but will not break under normal loads.
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Ooops!
Aug 24, 2008 21:38:19 GMT -5
Post by marlon on Aug 24, 2008 21:38:19 GMT -5
Shit Stew, that's no good!
So are you going to take it into work and scan it etc for fractures?
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Ooops!
Aug 25, 2008 1:36:01 GMT -5
Post by StewRoss on Aug 25, 2008 1:36:01 GMT -5
Hi, Yes Marlon, I took it to work this morning and here are the results...  ...started here at the bottom...and moved out from there...if you look at the pic at the top you can make out what looks like another one started down from the bottom of the thread behind...  As I thought, a fatigue failure of the shaft due to stress raisers in the bottom of the rough (very!) threads...some nice 'beach marks' there to show the progression of the fatigue cracks (cycles)...all as a result of a poorly made part. SR |
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Ooops!
Aug 25, 2008 5:13:32 GMT -5
Post by StewRoss on Aug 25, 2008 5:13:32 GMT -5
Yes, they're the older style Konis...basic and work well. Great shocks...the later adjustable damping ones are good as well. I have some on my Honda racer. They're now made here in Aus, about 2 hours drive from here in Albury. They're now called Ikons...play on the original name I guess. SR |
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Ooops!
Aug 29, 2008 17:09:47 GMT -5
Post by StewRoss on Aug 29, 2008 17:09:47 GMT -5
The SR is all fixed up...new swing arm spindle, new bush as there was a little play in the old one...not much but then why put it back when the new one has none...and new, proper nuts. I also fitted grease nipples in the ends of the spindle...so now there is 3 grease nipples on the swing arm pivot...gotta be better than one! The old seals, end caps and needle bearings were in good nick so I left them in.  I also took this chance to fit the Daytona braided hose for the rear brake caliper...straight on.  The bike is now all better again...  SR |
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Ooops!
Aug 29, 2008 18:38:39 GMT -5
Post by blakes on Aug 29, 2008 18:38:39 GMT -5
Stew Broken swing arm bolts are a common fault on XS650s. This website may be of interest to you as the XS650 and SR500 swing arm bolts are the same dimension: www.mikesxs.net/mikesxs-suspension.php?category_id=6.3You'll find the swing arm bolts that I am referring to on this page. Hope that helps Mark B |
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Ooops!
Aug 30, 2008 17:43:05 GMT -5
Post by StewRoss on Aug 30, 2008 17:43:05 GMT -5
Thanks Mark...not done any comparison in between the two...do the rest of the parts fit as well...bearings, thrust bearings etc.? Here are a few pics of the routing of the rear brake hose...it has to be directed away from the shock spring area. I used the caliper anchor bolt for the bracket at the rear.   SR |
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