Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
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
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!
Quote from: McCabe-Thiele (Ted) on November 28, 2021, 09:44:41 AMWell 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!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.
Ash, if you've got a sds hammer drill with rotary stop facility it can make a really good tool to remove things like this pivot, or at least give one of the best chances of getting them to move.You can buy a sds to square socker drive adapters for them, onto which you can use an old socket then make a drift mandrel to go inside the tube to centre it, with a step to locate on the pivot tube plus a hex to go inside the socket, then use the hammer action to drift it out.It's usually far more targeted and persistent than a hammer and trying manually. I buy old sockets from car boot sales to use for making bespoke tools in this fashion as I don't mind cutting them to customize a drift.
Sounds a good result AshSpent an hour or two today getting one pin out.SDS drill didn't do much sadly - except make all the house lights flicker as it battled the rusty pin!Fed a good sawblade through the pin and cut through on two sides after which the pin came out easily so got there in the end.Cheers,Andy
Well my SDS adapters haven't arrived yet, so soldiered on drilling the seized pins out.I have now removed 3 pins in 3 off CB250/350K centre stands, by drilling out with a really nice quality drill bit that an old guy (now sadly RIP) left me. I didn't do any saw-cuts at all on the last one.The good thing is, the pin is tubular and using a Makita cordless drill, the drill tends to centralise quite well if you take it steady and all three pins are now totally drilled out with no significant damage to the sidewalls of the stand horizontal pivot tubes. Plenty of some fancy pants 'Wurth' drilling compound that Ben Powell gave me last night also helped a lot. We did try 3 Tonnes of force on one seized pin last night in the hydraulic press at work, with no joy, even after heating the centre tube to almost cherry red. Without making suitable adapters, it was difficult to apply any more than 3 tonnes safely.Got one more to do for my mate in Beverley tomorrow (again CB250K) and then that's it for all of my bikes.I do have totally a spare seized 400/4 centre stand somewhere though, so when my SDS adapters arrive, I will dig it out and try the K2-K6 (Nigel) SDS impact method.