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Rear wheel backing plate

1405 Views 8 Replies 4 Participants Last post by  Scotsman
I was removing my rear wheel this afternoon to replace the knobbie with a new tw4 bridgstone when I discovered a crack near, and through the lug that slides onto the swing arm which holds the brake in position. A new one is available at $80.00. My question is will welding the plate weaken it or make it stronger. Also I wonder if any other forum members have experienced this brakeage. My supposition is that the previous owner replaced the rear sprocket with a smaller one (45) and did not shorten the chain, leaving the rear wheel too far extended leaving the brake too far extended from the lug on the frame causing extreme leverage on the end if the backing plate. Obviously his error was discovered as the chain is proper length now. Glad I discovered the crack before it broke off completely and perhaps locking up the rear wheel. Suggestions appreciated ------Scotsman
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As cheap as they are, I'd replace the brake plate. I didn't do any eBay research for you on used ones, but new, here are the numbers....

1987 through 1997 models use part number 2JX-25321-01-35 which costs 45.04.

1998 models and newer are part number 2JX-25321-02-35 and cost 45.04

So, either part number will run you 45 dollars, but I suspect the earlier model part number simply superceeds to the later part. Regardless, when you order one, they will update anything that has been superceeded automatically.
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That's pretty poor quality cast aliminum. I don't envy the guy who has to sew up the crack with the TIG. When I heat them to powdercoat, they release vile out gassing forever. Lots of stuff down in there to get out before you are gonna get a pretty TIG weld.
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