Warning: Fractured Wheel Bearing
Several days ago I replaced the Shinko 244 tire on my rear wheel. I always inspect every part of the wheel every time I remove a wheel, or replace a tire. The rear hub has two bearings, and the bearing near the rear sprocket was completely fractured. :wtf: I needed to cut the outer race of the fractured bearing with my dremel tool in order to remove it from the hub. :tdown:
The bearing on the other side, near the brake rotor, was notchy, and ready to fail. I replaced both Chinese bearings with Japanese bearings, which I had in stock for the original hub of my Zongshen ZS200GY-2. ;) The bearing in the sprocket carrier was in good condition. :) The stock bearings have very little grease in them. I packed the new Japanese bearings with extra grease before I installed them. ;) I have ridden over 13,000 miles on my RX3. However, I encourage everyone to check the wheel bearings, no matter how low your mileage. It is much easier to punch out a wheel bearing before it fractures. ;) I will post photographs of both Chinese bearings tomorrow. |
Spud, please post bearing size or code, thanks
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Since you are in Argentina, you might have an earlier version of the rear hub. It contains the following bearings. Rear Hub Bearing Sizes Rear Hub Bearing, Sprocket Side: 6202 2RS Rear Hub Bearing, Brake Rotor Side: 6302 2RS Sprocket Carrier Bearing: 6004 2RS However, CSC, Cyclone RX3 motorcycles sold in the United States contain the following bearings. Rear Hub Bearing Sizes Rear Hub Bearing, Sprocket Side: Two 6202 2RS Bearings Rear Hub Bearing, Brake Rotor Side: Two 6302 2RS Bearings Sprocket Carrier Bearing: 6004 2RS |
If you replace a worn bearing before it fractures, you can easily remove it. I prefer to drive out wheel bearings using a Motion Pro bearing driver and split collet. The bearings in the rear wheel of the RX3 can be removed using the following parts. :tup:
http://www.motionpro.com/motorcycle/partno/08-0260/ https://ff3d8e6495061f28a832-a7869bb...ms/08-0260.jpg http://www.motionpro.com/motorcycle/partno/08-0268/ https://ff3d8e6495061f28a832-a7869bb...ms/08-0264.jpg Just in case someone hasn't used this method to remove wheel bearings, here's how it works. ;) http://www.dansmc.com/wheel_bearing_remove.jpg |
I have bought individual drivers and split collets for the different sizes of wheel bearings in all my motorcycles. However, if I were buying the bearing drivers today, I would get the Pit Posse Motorcycle Wheel Bearing Remover Kit, PP-1692. :tup:
http://www.amazon.com/Pit-Posse-Moto.../dp/B005SUVQUK http://www.ebay.com/itm/Motorcycle-W...ZyimIg&vxp=mtr http://i.ebayimg.com/00/$(KGrHqN,!iM..._id=880000500F |
You can decipher the bearing code by reading the information at the following links. ;)
http://www.gizmology.net/bearings.htm http://www.mymachineinfo.com/2015/07...ion-guide.html http://www.engineerstudent.co.uk/bea...explained.html http://www.engineerstudent.co.uk/bea...plained_2.html For example, a 6202 2RS bearing has the following features. 6 = Deep Groove Ball Bearing (Single row) 2 = Light Duty Bearing 02 = Inner Race Diameter of 15 mm 2RS = 2 Rubber Seals |
Wheel bearings fail more quickly when they lack sufficient grease, and every wheel bearing I have examined suffers from this deficit. :wtf: For example, here is a new wheel bearing I was going to install in one of my Honda motorcycles. ;)
http://i442.photobucket.com/albums/q...akepads006.jpg Therefore, I always pry off both rubber seals, and add more grease to the wheel bearing before I install it. :) http://i442.photobucket.com/albums/q...akepads008.jpg |
Using a bearing driver makes it much easier to remove old bearings.
http://i442.photobucket.com/albums/q...akepads015.jpg http://www.dansmc.com/wheel_bearing_remove.jpg Just make sure you get the correct size driver and collet for the bearings you wish to remove. ;) |
Very complete information, thanks!
I use my own method to remove bearings, paraphrasing Homer Simpson, there's the right method (yours), the wrong method, and mine, it's like the wrong but slower and with lots of swearing! |
Thanks for the warning Spud. I'll replace mine on the first tire change as a precaution. I ride in lots of mud and water so the bearings probably won't last.
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Lee, I do also, my bearings have 16K km on them and they're smooth as silk, but as you said it's cheap insurance to change them anyway.
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Is this info on the sticky thread about parts? I was about to ask about front bearings also.
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great write up
This is why this place rocks! Did you put the rubber seals back on afterwards ?
Thanx Spud:tup: |
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Anchor Bolts and a slide hammer (or a anchor bolt, hammer, and punch combo) can also be used to remove Old Wheel Bearings ;) and they only cost about $1 or so for the size of bearings our bikes use :)
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Darn I answered almost everything... but I forgot to mention about those pesky "Metal Sealed" ones, thanks for reminding me Spud :tup: I haven't seen that style in a while so I forgots about them :hehe:
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I like that wheel bearing removal kit.
When adding grease to a bearing, a needle attachment for a grease gun is helpful. |
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Seems cheap insurance as you said, to just punch out the current ones and drop in some known higher quality pieces. Love the pictures from down south by the way, I'm planning a trip with a friend but it's a few years out to head south and I need to work on my Spanish a bit to get the most from it. Lee |
I'm going to check my front bearings once again. If I have the correct size in stock, I am going to replace them, also. ;)
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I use either my finger, or a welding flux brush to apply extra grease to the bearings. ;) |
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Ordinarily, I would have noticed a notchy wheel bearing a long time before it fractured. However, my Shinko, 244 rear tire lasted so long, I didn't remove the rear wheel for inspection as often as usual. ;) |
Come on, are you going to tell me that you don't dismantle the whole bike, just for the fun, every other weekend?
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:lmao:
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I'm pleased to report the front wheel employs two, 6302 2RS bearings, and they were in excellent condition. :tup:
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Spud :thanks:
once again |
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Do you have a link where I can buy the higher quality Japanese bearings? |
This is sad, don't even have my bike yet and went ahead and picked the bearings up today while at work. At least I'll have them....
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Bearngs
Wonder if the TT uses the same bearings........
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Everytime I log in, I see a new " oh crap , i better check that thing" post.
but seriously , i'm have a fun time putzing around on my little hawk. The mikuni was a big improvement on several fronts. |
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http://www.chinariders.net/showthread.php?t=5243 |
I found NACHI brand Japanese bearings on Amazon, in the sizes you listed. They were about $7 each, as opposed to $1 - $3 for the other brands.
What is the size for the front wheel? I'll just make a go of it, and buy all 5 right now. |
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Post Edited to Correct Errors
CSC, Cyclone RX3 motorcycles sold in the United States contain the following bearings. Rear Hub Bearing Sizes Rear Hub Bearing, Sprocket Side: Two 6202 2RS Bearings Rear Hub Bearing, Brake Rotor Side: Two 6302 2RS Bearings Sprocket Carrier Bearing: 6004 2RS Forum members living in foreign countries might have an earlier version of the rear hub. It contains the following bearings. Rear Hub Bearing Sizes Rear Hub Bearing, Sprocket Side: 6202 2RS Rear Hub Bearing, Brake Rotor Side: 6302 2RS Sprocket Carrier Bearing: 6004 2RS |
5 bearings totaled $22! For piece of mind, sounds good to me!
If I recall correctly, bearings were the only issue with some guy riding through Europe, right? |
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I think the Silk Road Rider only had problems with his rear wheel, and I wouldn't be surprised if it was only the 6202 bearing causing the problem. ;) The 6302 bearings are large and robust. The 6004 bearing is serving light duty in the sprocket carrier. As long as these bearings are packed with sufficient grease, I don't think they will cause any problems. However, I received a replacement rear hub from CSC which only had two bearings. I suspect the Silk Road Rider had the same hub, and the weak spot is the single, 6202 bearing in the rear hub. RX3 bikes sold in North America have an upgraded rear hub which contains four bearings, instead of two. |
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Can the bearings be re-greased in place (without removing them from the wheel)? |
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