I have a 1971 commando, it looks like someone bolted something to the down tubes (photos attached).
Can this be repaired if so could you recommend anyone to do it?
I have almost stripped the bike down as I would like to get the frame powder coated.
I live in Milton Keynes but happy to travel.
Adam


John hand is one of the best…
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Probably crash bars - they…
Probably crash bars - they were never a good idea.
You can buy new frame sections from Andover Norton:
https://andover-norton.co.uk/en/shop-drawing/465/1971-on-commando-frame-repair-items
You could cut out the damaged sections and let in new tube from the AN repair sections. But it might be cheaper to find another frame.
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Thanks, I am a bit reluctant…
Thanks, I am a bit reluctant to buy another frame as the frame engine and gearbox numbers all match. Hopefully I will find someone to repair it as I don't have the equipment or know-how to repair it
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I can highly recommend Ian…
I can highly recommend Ian Bain up here in Widnes.
Ian made a first class job of repairing my Combat frame which was a lot more involved than your problem appears to be.
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A frame guy should be able…
A frame guy should be able to heat that and pull it back into shape with a rod temporarily welded to it. And a bit of hammering. Maybe a smear of filler then.
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Plenty of options I think…
Plenty of options I think. You can go the Andover route and get repair bits. Seemed a bit excessive to me at first, but there is an advantage in not having to source the right diameter and thickness of tube.
As it's in the straight bit, a repair should be fairly simple. As I'm no expert, I would go for one of three routes when doing it myself:
1. Clean up the dented area with a flappy disc. Use liquid metal (is that what you British call Araldite?) To fill the dents and start filing and sanding. Use a sanding block, so you can follow the contours of the round tube around the dent. That should be okay to powdercoat.
2. Cutting the dented piece out, sliding a fresh piece of tube with a smaller diameter (snug fit) in. Drill holes through the old and new tube to spot weld it in place by filling up the holes. Then take a proper diameter tube, cut it lengthways and place that around the smaller diameter tube. Then weld it all up together.
3. Use the right diameter tube, cut the bad bit out and weld the right bit in. I just don't trust my welding enough for that to feel secure enough.
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Damage to downtubes
If it's a UK bike then probably caused by crash bars or an Interplod fairing. If it's a US bike then Hi-Way pegs.
If it's only a dent to the tubes and a straight edge shows no misalignment then a cosmetic repair should suffice.
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Some great advice thank you…
Some great advice thank you everyone
It is a US important so was probably pegs clamped to the frame. I think I will get someone to repair it and check the frame at the same time
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John hand is one of the best frame makers I know - he's worth talking to - I only have a facebook link sorry.
https://www.facebook.com/profile.php?id=100050486261659
Dan