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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: foliver on September 17, 2023, 12:18:32 PM
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Hello, all long time without writing.
My K75 has the rear rim with a punch (i went into a hole in the street, and boom), and i cannot find someone who can straighten it in my country, no motorcyles rim repair...at leat this kind.
I mounted new tyres and i've had a little air pressure lost, but now is ok, after good inside rim cleaning.
But i see it with a little movement, i cannot feel anything while riding.
Any advice on that? no big deal? big deal?
I'm planning to travel a bit in december.........
here a vid and a picture
https://youtube.com/shorts/5vdMY8zgpCk?feature=share
Thaks for your opinions!!!
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Those "Y" spoked wheels are quite soft and do dent easily. From what I can see in the pic, I wouldn't worry too much about it.
If you want to try a fix:
Take the wheel off and deflate the tire. Dent side up and use a plastic faced dead blow hammer or a piece of 2X4 wood and a good sized metal hammer and work over that area until you work most of the dent out. The back side of the tire on the ground might cushion the hammering so it may take quite a bit of effort.
I have worked out numerous dents in my front wheels (never had a rear dent) over the years, usually at a tire change using a Magic Marker while spinning the wheel on the axle to mark the spots needing attention.
Or just live with it.
Frank
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Hello Franck, thanks for your reply.
i'll follow your sugestion, before atempting any long trip.
I didn't knew it was easy as iron rims, i was affraid that aluminium cracks, but after your experience i supose it's elastic too.
txs!
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Because the wheels were designed for tubeless tires BMW used a softer, less brittle aluminum alloy.
A harder alloy has the danger that on a hard impact the rim can crack and cause a rapid loss of air pressure. Needless to say, this can be very painful at high speed. A softer rim will deform on a hard impact, but it will keep holding air, and can be repaired if one goes about it slowly and carefully.
As was mentioned, a heavy hammer and a couple wooden blocks with a little patience is all that you need to get the wheel back to reasonably close shape.
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Your two responses were the best news I could have received.
Txs Mighty!
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I’ve got an extra rear rim