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Discussion Starter · #1 ·
 I was doing some end of season maintenance on my bike, and took the rear wheel off to check the brake shoes and inner drum and also regrease the rear splines.  Everything looked good with the splines, no sign of wear at all, but the shoes were shiny and smooth, and the drum was black inside.  I sanded the shoes and roughed them up good, and sprayed brake cleaner over everything to get things good and clean.  The only mistake was when I was pushing the wheel back in I was tired and impatient and managed to snap off a piece of the wheel (see pic below).  I found a large piece of it and JB welded it back in, but there's still a little bit of a gap.  As you can see, it's just the very outer-most piece of the rim, not the actual braking surface.  I didn't take a picture after the fix, but if you can imagine the 1/2 moon piece being in and the straight edge piece missing.  Is this a ruined rim or can I still safely use it?  I'm assuming it might let a little bit more water and road debris in, but once the wheel was back on it was very difficult to tell where the broken section was.  Opinions?









 

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You'll be fine with it even if you didn't glue the piece back in. I have seen worse that didn't cause any issues.

Hmmm, this may be a way to vent the drum and let some of the brake dust to be blown out.
 

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Beg to differ, that fracture crack may travel in time due to the harmonic inbalance it introduces. Drum doesn't look the best anyway.



Not your primary support but I'd keep an eye out for an inexpensive used one, worst part is having to move the tire if you don't end up with one that's already got a better one on it.
 

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The first time I looked at it I thought that was the corner of the rim. One hell of an illusion angle you have there.



It should be fine but it you have a grinding tool I would smooth off the edges that mate against the brake plate just for luck.



If you can try and hunt down another rim. But I wouldn't worry immediately. More of a thought for when new tires are mounted. By hunt down a rim I mean dirt cheap. If you were here I would give you one like several have gave me rims for free. Bet I have had nearly 10 sets go through my hands back into the forum.
 

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To add to what Marshal said about the imbalance, you may need to offset that loss of material with a bit of wheel weight on the opposite side to keep from getting a bad vibration. +1 on the hunt for a surrogate.
 

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Mt concern lies in the way our rear drums can "sing" and there lies a crack in the bell.



Worst case, build up a bit of that epoxy putty which comes as a stick and everyone hates. I had to repair the rusted area of a 10" pipe with 25 psi going through it at one time, was laughed at but it held for over a week until all the paperwork went through and I got a professional welding crew out to manufacture and replace a decent section of it.



Well forgotten during what can be 140°F on that roof, I need to get off my bum and wire brush, etch prime + paint that thing. 1/4" steel doesn't degrade that quickly but I really don't need to invite trouble down the line. Easily more than 2 miles of pipe in the system from 12" down to simple 1" stuff but I hate every inch of the stuff. Despite the corrosion inhibitors I've got running through the internals the outer parts have 44 year old insulation on them (read: asbestos) and I prefer not dealing with it.
 

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The way I see it. This could come back and bite you in the rear. Pardon the pun. Or it could be perfectly fine.Either way, wheels can be easily found for a small fee. Why take the risk? This is after all your only rear wheel. Not like you have another on the other side like a car. I'm not saying I think it will come apart. I actually think it would last like that for the remainder of the bike. For me, it would always be in the back of my mind. On every ride. That nagging feeling that something is wrong with my machine. I could not focus on my riding skills. It would be a distraction.



I also thought it was a part of the outer rim like 'stitch.



Michael
 

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The way I see it. This could come back and bite you in the rear. Pardon the pun. Or it could be perfectly fine.Either way, wheels can be easily found for a small fee. Why take the risk? This is after all your only rear wheel. Not like you have another on the other side like a car. I'm not saying I think it will come apart. I actually think it would last like that for the remainder of the bike. For me, it would always be in the back of my mind. On every ride. That nagging feeling that something is wrong with my machine. I could not focus on my riding skills. It would be a distraction.



I also thought it was a part of the outer rim like 'stitch.



Michael
plus one.you need to believe 100% that your wheels,tyres and brakes are as near perfect as possible.....you can get away with noisy valves or a dodgy tach cable.

edit,very wise move
http://cx500forum.com/index.php?/topic/2221-all-parts-for-79-cx500/



[nice to see you checking in micheal
]
 

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Discussion Starter · #9 ·
Y'all convinced me, I'm looking for a new rear wheel now.  My rear tire has plenty of tread but it's 3 years old, so it probably only has another year or 2 at most, maybe I'll replace my 16 with an 18.  Bandit, did you find it any easier or harder to change tires when you switched from the 16 inch to the 18?   Ebay has several, and I posted a Wanted to Buy thread on the buy/sell section.  
 

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Y'all convinced me, I'm looking for a new rear wheel now.  My rear tire has plenty of tread but it's 3 years old, so it probably only has another year or 2 at most, maybe I'll replace my 16 with an 18.  Bandit, did you find it any easier or harder to change tires when you switched from the 16 inch to the 18?   Ebay has several, and I posted a Wanted to Buy thread on the buy/sell section.  
kingstone,the 18 inch wheel i bought off an ebay shop came shipped with a near new tyre.

but,i know for me when i need to buy a new tyre,18 inch are a lot cheaper that 16,plus more variety of options.

good luck.
 
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