SOHC.co.uk Forums > CB500/550
Back with a 500 ....
davidcumbria:
--- Quote from: Oddjob on February 28, 2023, 08:23:04 PM ---
New ones were from a K3 David. The engines are identical, put 2 side by side and cover the numbers up and you wouldn't be able to spot the difference. It's not like putting a 550 in a 500 frame or vice versa. As I said IF it was so important, keep the original cases and sell them with the bike, let someone else have the expense of fixing them. £120 for a set of cases with marching shells, really good shells as well and a matching crankshaft is beyond a bargain, check ebay and see. Now you've got to pay for alloy welding and that's IF you can get the pins out, new shells, which if going by the state of the mains the rods will be buggered as well, that's 18 shells each around £20, another crank, ask Ted how much he paid for one, another £100-150, that's the fat part of £500-600. That's money you will NEVER get back, the 550 is not that collectable, it's not an investment bike like a 500K0 or even a 500K1 or a 750K0.
But it's your bike and your money and your choice.
Oh and it's a 550K1 not a 550K0 Julie. Not worth even half as much, not that the K0 is worth anything anyway.
Really sorry for the thread hijack Simon, I really wanted you to avoid the mistake I made with the clips, you have a lovely bike and it's important to me that you keep it that way, the 500 has always been MY bike, it's my first love so if I can keep one on the road that's worth going that little extra mile for. In an effort to stress how important it was to made I made that statement on your thread instead of starting a separate one which was always my intention. Sorry mate.
--- End quote ---
Ken if you would like to keep in touch about this ( I haven’t yet got any idea on the sizes, cost or availability of shells for my engine which is pretty crucial) pls pm me your email since I can’t message you. Sorry for the Thread hijack Simon
davidcumbria:
Ken I’ve had chance to check out the bearings and it could be that I need the no longer available yellow ones, cases stamped CBAAA. As you know I’m driving by your place tommorow so would be happy to pick up the bottom end and chuck in extra 20 quid for the hassle. You’ve got my phone number so let’s keep the discussion off here and text me if you’re interested.
Trigger:
--- Quote from: davidcumbria on March 01, 2023, 10:14:52 AM ---Ken I’ve had chance to check out the bearings and it could be that I need the no longer available yellow ones, cases stamped CBAAA. As you know I’m driving by your place tommorow so would be happy to pick up the bottom end and chuck in extra 20 quid for the hassle. You’ve got my phone number so let’s keep the discussion off here and text me if you’re interested.
--- End quote ---
You can not use shells by letter stamping. The manual references are for new parts and not worn cranks ;)
Sesman:
--- Quote from: Trigger on March 01, 2023, 11:31:00 AM ---
--- Quote from: davidcumbria on March 01, 2023, 10:14:52 AM ---Ken I’ve had chance to check out the bearings and it could be that I need the no longer available yellow ones, cases stamped CBAAA. As you know I’m driving by your place tommorow so would be happy to pick up the bottom end and chuck in extra 20 quid for the hassle. You’ve got my phone number so let’s keep the discussion off here and text me if you’re interested.
--- End quote ---
You can not use shells by letter stamping. The manual references are for new parts and not worn cranks ;)
--- End quote ---
Is that entirely correct Trigger? I’m just curious if this applies should the journals measure up as ‘relatively’ unworn. It’s just that the alpha/numeric method worked fine for me. I even plastigauged post bearing selection and it measured up. I’m not a trained mechanic by the way.
Trigger:
--- Quote from: Sesman on March 01, 2023, 12:40:59 PM ---
--- Quote from: Trigger on March 01, 2023, 11:31:00 AM ---
--- Quote from: davidcumbria on March 01, 2023, 10:14:52 AM ---Ken I’ve had chance to check out the bearings and it could be that I need the no longer available yellow ones, cases stamped CBAAA. As you know I’m driving by your place tommorow so would be happy to pick up the bottom end and chuck in extra 20 quid for the hassle. You’ve got my phone number so let’s keep the discussion off here and text me if you’re interested.
--- End quote ---
You can not use shells by letter stamping. The manual references are for new parts and not worn cranks ;)
--- End quote ---
Is that entirely correct Trigger? I’m just curious if this applies should the journals measure up as ‘relatively’ unworn. It’s just that the alpha/numeric method worked fine for me. I even plastigauged post bearing selection and it measured up. I’m not a trained mechanic by the way.
--- End quote ---
You went the correct way by plastigauging up everything and were lucky that the crank was not worn. Must of been a low mileage engine or had the correct oil changes.
I think it was Ash that bought a load of shells for one of his SOHC's and when he plastigauged the crank up he had to hunt for another size.
And the hundreds of SOHC's engines i have built, i would say at least 45% had worn cranks. Years ago you could always fine a good crank that was within spec but, as theses old girls get older it is not so easy these days.
In my old workshop years ago we used good cranks as door stops because we had so many on shelfing racks ;)
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