Annaz Posted August 30, 2011 Report Share Posted August 30, 2011 I've had the sponny for nearly 5 years now and I'm on the 3rd set of rear wheel bearings, which need changing after less than 2k miles. I have decided I'm either fitting them wrong somehow, although I don't see how coz they're pretty straight forward......probably. I reckon either I'm not getting the wheel aligned correctly, the sleeve (through the wheel) is slightly the wrong size or has play in it, the bearing I'm fitting is wrong in some way or the dark forces of mechanical magik are at work. It is also possible I'm not torquing the axle enough, though it is fucking tight (mechanical term there for 150ftlbs roughly) Any thoughts or suggestions greatly appreciated as always Link to comment Share on other sites More sharing options...
ronenige Posted August 30, 2011 Report Share Posted August 30, 2011 it's usually a spacer problem , hth Link to comment Share on other sites More sharing options...
Annaz Posted August 30, 2011 Author Report Share Posted August 30, 2011 it's usually a spacer problem , hth Well if anything the spacing would be on the tight side Link to comment Share on other sites More sharing options...
Evilchicken0 Posted August 31, 2011 Report Share Posted August 31, 2011 Can you take it to a frame specialist and have it checked on a monoliner so you know it's all straight, basically take it back to spondon for a check up. Could the cush drive be duff alowing the wheel a bit more movement than usual ??? Link to comment Share on other sites More sharing options...
Annaz Posted August 31, 2011 Author Report Share Posted August 31, 2011 Can you take it to a frame specialist and have it checked on a monoliner so you know it's all straight, basically take it back to spondon for a check up. Could the cush drive be duff alowing the wheel a bit more movement than usual ??? I'm going to check the alignment out first with a straight edge and a lazer. I'll check the cush drive out, although the problem does seem to be at the other side. I'll have to mic and measure the spacers and sleeves too. The guy who originally built the bike is popping round at the weekend to have a look too. It's looking like it's not a common problem so I'm now ambarking on a mechanical voyage of discovery Link to comment Share on other sites More sharing options...
Kayla Posted September 1, 2011 Report Share Posted September 1, 2011 I'm going to check the alignment out first with a straight edge and a lazer. I'll check the cush drive out, although the problem does seem to be at the other side. I'll have to mic and measure the spacers and sleeves too. The guy who originally built the bike is popping round at the weekend to have a look too. It's looking like it's not a common problem so I'm now ambarking on a mechanical voyage of discovery Is it possible the internal spacer is slightly too short and when you torque the spindle up there's a slight side load on the bearing- enough to cause it to fail early but not enough to cause it to bind so much that you'd notice? Link to comment Share on other sites More sharing options...
Annaz Posted September 1, 2011 Author Report Share Posted September 1, 2011 Is it possible the internal spacer is slightly too short and when you torque the spindle up there's a slight side load on the bearing- enough to cause it to fail early but not enough to cause it to bind so much that you'd notice? That's quite an interesting point Kayla I'll add it to the check list Link to comment Share on other sites More sharing options...
porter_jamie Posted September 1, 2011 Report Share Posted September 1, 2011 it's normally cos the tube is a bit too short Link to comment Share on other sites More sharing options...
lorenzo Posted September 1, 2011 Report Share Posted September 1, 2011 Annaz is well known for his short tube. Link to comment Share on other sites More sharing options...
uggiebear Posted September 1, 2011 Report Share Posted September 1, 2011 http://www.YAMAHAmotorcyclespares.co.uk/spares/epc2.asp?ModelID=7872&pageID=31&uid=0 I take it your replacing bearings, 4 & 2. What is the condition of bearing number 13(sprocket) does that get replaced? When you replace them does the wheel bearings have any slack in them or are they seated quite firmly. Does the wheel have all the seals and clips and spacers in? Are there any interesting wear marks on the wheel or swing arm, i wont ask if the chain is fooked or slack. If its not the spacers the only other thing i can think of is the axle bolt true, cant see you missing that one either. On an important note how is it failing cracked cage brunelling or total failure? Link to comment Share on other sites More sharing options...
Annaz Posted September 1, 2011 Author Report Share Posted September 1, 2011 Annaz is well known for his short fuse. Fixed Cheers Porter Jamie that's on the list @ John bearing 4 was replaced 2 years ago and still seems fine, no 13 hasn't been replaced since I've had the bike, not sure if the cushdrive is sound tho. No slack on the caliper side bearing when it's replaced, chain ok, I normally run it on the slack side just in case. I haven't noticed any wear marks in the past but I'll know better tomorrow. As for where the failiure is I'm not sure just general slackness. Edit; to change stuff Link to comment Share on other sites More sharing options...
uggiebear Posted September 1, 2011 Report Share Posted September 1, 2011 Hmm a bit of a strange one hope the visual inspection helps. I can only suggest to get a BST/Dymag carbon wheel as the reduced weight will hopefully cure the problem, if it does not i will take em off your hands Link to comment Share on other sites More sharing options...
Annaz Posted September 2, 2011 Author Report Share Posted September 2, 2011 Nothing showing up on the inspection of the spacers and sleeves etc. I did notice that my measly torque wrench can only manage 90ftibs and 150 is needed. So I'm hoping that it's just basic incompetance Borrowing some digital calipers tomoz might shed some light too Link to comment Share on other sites More sharing options...
Annaz Posted September 3, 2011 Author Report Share Posted September 3, 2011 It's all in bits now and its seems to be the needle roller bearing, on the drive side, that's the culprit. I don't know why Yamaha decided to fit a stoopid needle bearing in a rear wheel, what a wank idea! So when I replaced said needle bearing 2 years ago I thought the bearing on the caliper side was fine but they should be all changed together otherwise one will wreck the other and that seems to be what's happened. All the spacers measure up fine, no wear on any sleeves, swinger bearings etc are fine. Unfortunately Yamaha don't stock these needle tosser bearings so I'll have to wait til' thurs for one Edit to add, because of the bearing in the chainwheel it's not possible to detect the play in the needle one when the wheel is fitted. Caliper side bearing £10 Needle bearing £51.49 Sheesh! Link to comment Share on other sites More sharing options...
lorenzo Posted September 3, 2011 Report Share Posted September 3, 2011 Have you had a look at simplybearings, see if they can help? Link to comment Share on other sites More sharing options...
Annaz Posted September 4, 2011 Author Report Share Posted September 4, 2011 Have you had a look at simplybearings, see if they can help? That's a good find. Cheers for that Loz Link to comment Share on other sites More sharing options...
lorenzo Posted September 4, 2011 Report Share Posted September 4, 2011 That's a good find. Cheers for that Loz I'm good to you, I am. Link to comment Share on other sites More sharing options...
jaycee Posted September 4, 2011 Report Share Posted September 4, 2011 I'm good to you, I am. Well I'm not thanking you for the link. You'll only get a big(ger) ego. I just stole it, so nerr Link to comment Share on other sites More sharing options...
Annaz Posted September 7, 2011 Author Report Share Posted September 7, 2011 I'm now looking for some Shell Retanex red bearing grease or Timken red bearing grease. Because I'm told it's the ultimate gear. There's some on the bay but it's in cartridges and I only want a small tube. Could use the Stihl stuff but that's £8 a tube! Link to comment Share on other sites More sharing options...
Annaz Posted September 8, 2011 Author Report Share Posted September 8, 2011 Eureka!!!!! I have found the problem It turns out the 5mm ally washers (that fit externally of the swingarm either side) that I was using as a reference point for measuring the wheel alignment are different diameters When I checked them with the vernier calipers they read a difference of over 2mm. I've now turned the larger one down so it's the same size and checked everything through with a lazer and a straight edge and it's spot on everywhere. Hopefully that will be an end to the matter! Thanks for your comments and support Link to comment Share on other sites More sharing options...
Annaz Posted September 10, 2011 Author Report Share Posted September 10, 2011 Well after going for a 10 mile test ride to Squires (and seeing some tosser throw his CBR down the carpark into a white van parked near the entrance. Trying to show off ) I got back and the bearings were fucked already :angry: Today the rear wheel was checked and that revealed evidence of impact damage, I reckon I can remember the pothole that caused it too, it's enough to cause the wear levels i've been experiencing. I'm going to check the front wheel tomorrow too because my warped disc/caliper chattering thing started around the same time I checked the chain too today (you know where you grab a link on the back of the rear sprock and see if there's any give, there was plenty Possible two replacement wheels and an X ring chain.....KERCHING!!!.....again Link to comment Share on other sites More sharing options...
Annaz Posted September 21, 2011 Author Report Share Posted September 21, 2011 Just to confirm, for future reference, it was the rear wheel at fault. After fitting a different wheel and riding over 110 miles there is no play! Phew! Moral of the story is; Pay attention and avoid nasty bumps and potholes! Link to comment Share on other sites More sharing options...
bignige Posted September 21, 2011 Report Share Posted September 21, 2011 At last! Link to comment Share on other sites More sharing options...
Annaz Posted September 21, 2011 Author Report Share Posted September 21, 2011 At last! Thanks mate! It's what I was thinking Link to comment Share on other sites More sharing options...
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