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Centre Stand seized pin fix?
AshimotoK0:
Having just spent several hours, about ten quids worth of Mapp gas, hacksaw blades, blood, sweat, toil & tears :( removing a TOTALLY rusted in pin on a CB250K centre stand (suspect bike was left outside for many years) ... has anyone ever tried chopping off the ends of the pipe part/seized pin and at the same time cutting off the outside welds then grinding off the small amount of internal welding, chopping through the centre of the stand tube (and old pivot pin), then totally remove the old centre tube and welding in a new piece of mild steel pipe. Not sure about sizes on other bikes but I have found suitable mild steel tube on eBay (actually in Hull, near me) suitable for the CB250/350K.
Orcade-Ian:
Hi Ash,
I did exactly that a few years back on our C50 LAC and the advantage in my case was that because the holes in the frame lugs were worn too, I was able to 're-size' those and use a larger O/D tube. I had to machine that to size and it was a bit tedious getting the old tube out with a Dremel, so as not to inflict too much damage to the stand. It's still as good as new but does get regular greasing.
If you need a piece machining, let me know.
Ian
AshimotoK0:
--- Quote from: orcadian on November 27, 2021, 05:38:59 PM ---Hi Ash,
I did exactly that a few years back on our C50 LAC and the advantage in my case was that because the holes in the frame lugs were worn too, I was able to 're-size' those and use a larger O/D tube. I had to machine that to size and it was a bit tedious getting the old tube out with a Dremel, so as not to inflict too much damage to the stand. It's still as good as new but does get regular greasing.
If you need a piece machining, let me know.
Ian
--- End quote ---
Great stuff Ian .. On this occasion, I struggled on and managed to get the old pin out but it didn't even collapse away after two saw-cuts and I had to drill quite a bit of it out.
The next one I do though I will consider the weld-in-a-new-tube method. When I looked into it, the ID of the CB250K tube (and possibly the 400/4) was 17mm and the ID just over 23 mm. You can easily get 25mm x 17mm ID mild steel tube, so I was going to machine the OD down to the correct diameter. Thanks for the offer of machining .... most kind.. but I have got a small lathe here and loads of machine tools where I still work 1-day/week.
McCabe-Thiele (Ted):
Well done Ash that centre pin out - mine took a whole weekend similar struggles.
Out of interest is your replacement a nice solid pin - they could do with a grease nipple!
AshimotoK0:
--- Quote from: McCabe-Thiele (Ted) on November 28, 2021, 09:44:41 AM ---Well done Ash that centre pin out - mine took a whole weekend similar struggles.
Out of interest is your replacement a nice solid pin - they could do with a grease nipple!
--- End quote ---
I haven't bought one yet Ted .. I may even make one myself. My friend with a 400-4 tells me the pattern replacement one he bought from David Silver was solid, not tubular.
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