Frame repairs

[LC_BOTT]

Hi, looking for advice on how to repair this?

[LC_BOTT]

Dec 9, 2023 21:26:47 GMT 1 LC_BOTT said:

Hi, looking for advice on how to repair this?

[LC_BOTT]

Sorry post is a bit disjointed, as trying to post with tapatalk.

Anyway dragged this frame from behind my shed this afternoon, and discovered this after removing the paint. Is it best to cut out the section or can it be filled with weld after preparing a suitable grooved joint?

[midlifecrisisrd]

Hi

The way that has split I wouldn't trust just welding it up

I'd prefer cutting that bit out with a 45 degree cut to give a larger contact area and it not be a straight line

Means you can also fit small pieces of tube with an OD the same as the frame ID

Weld in a repair section then weld the bracket back on

Just my thought

Either that or a staggered cut to achieve the same. Did that on my brining it back from the dead N1 build but that was the section behind the stand which was solid
Steve

[JonW]

I think you will need to cut the stand mount of fully, then cut a section (half round) where it goes on to get back to unrusty metal. That may balloon to being a whole piece of round tube in the end.

When you have that bit back in, then dress and weld the stand mount back on.

Solid metal is what you want, I expect this frame has had water in it and its made the metal thin all along the tube, but you might be lucky.

[LC_BOTT]

Dec 10, 2023 1:02:42 GMT 1 JonW said:

Solid metal is what you want, I expect this frame has had water in it and its made the metal thin all along the tube, but you might be lucky.

Thanks both, I do have a spare 'Q' plate frame, but I'm reluctant to chop it about at present.

The metal on this looks quite thick, so don't think it's rust, could it be from crash damage? It's worn a chamfer on the bracket end, will groove it out first and see what it's like. TBH I can't even remember buying the frame, but assume it was just a rolling chassis that I bought for future project/parts years ago.

Thanks

[dusty350]

Just had a repair done on the 350Lc frame I have. It was missing the side stand mount, but also half the sleeve the mount welds to;

53259675654_d72b78b784_c by dusty miller, on Flickr

Took it to Glen, the welding guy near me, and he cut and welded on some half round tube, dressed it back and then welded on the aftermarket side stand mount;

20231021_082114 by dusty miller, on Flickr

The sleeve repair looks stock. Seemed an easy job for him ! I guess - cut off you stand mount, repair the sleeve in the same way and weld a cleaned up mount back on

[reedpete]

Yep, agree with all above but maybe articulate in a slightly different way. See it as two tasks.
1. Repair the frame tubes by using a new section and not from a donor frame as that’s actually the tube joint, so better to replace with new tube.
2. Refit the side stand bracket.

[JonW]

yep the tube is a standard size, get a nice solid piece and weld it in. whole or half, do what is needed. Then weld a larger piece around the repair like the LC version if you want belt n braces, before adding back on the side stand bracket.

To be fair at this point unless youre good at welding, Id ask someone who welds bike frames to do it as its important and you need to be confident in your work or the bike will fall over if the frame breaks and the mounts fails etc.

Tho... {controversial perhaps}... To be honest this part isnt mega structural in the scheme of things for the ypvs frame, but I would never leave it off. I repaired a frame that someone cut this bracket out as a whole spar for my F2 and it hadnt moved at all in years of being moved about as a whole bike etc.

[LC_BOTT]

Great advice all, and thanks for the pics, going to do as suggested and put in a new section. Mine looks a bit flat and deformed too. So should be much better than a quick repair, and all the old fatigued/split tube will be gone.