SOHC.co.uk Forums > CB500/550

Frame/Swingarm prep for paint

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Laverda Dave:
I used the kit from Pyramid Parts and whilst it did fit there was only 1.5 turns on the castelated nut. I contact Pyramid and they requested photos and these were duly sent with the measurements. Pyramid admitted the kit was not suitable for the 400/4 despite their listing stating it was and gave me my money back. This was the same kit many have used on here. Pyramid agreed with my findings that it could be dangerous.
I bought a set of caged ball bearings in the end and they fitted perfectly using a 2mm shim on the lower yoke.
I have contacted Pyramid a couple of times since to request an update and I also voluntered to try the stepped bearing they were proposing but they told me they are currently speaking to several restorers of these machines to obtain a solution. Needless to say I had a pig of a job to get the taper races out of my newly powder coated frame!

mickwinf:
when I stripped Lazarus it had Taper rollers fitted and they are really difficult to remove as they are the same diameter as the headstock tube so no lip to get a drift on to bash it out. In the end my mate who has welding gear ran a bead of weld around it and it just dropped out. I bought some of the caged ball type but was not happy with the quality so chucked them in the bit and went for original races and generic ball bearings.

Mike_Berkshire:
Thanks for all the input and suggestions. I will tap out the brake bit and the bearing cups and whilst Im at it will have a go at the shock bushes and see how bonded in they are. I will get a kit of the old-style ball bearings and races as if it worked for nigh on 50 years then thats going to see me out. Mike

McCabe-Thiele (Ted):

--- Quote from: Laverda Dave on May 11, 2024, 03:32:53 PM ---I used the kit from Pyramid Parts and whilst it did fit there was only 1.5 turns on the castelated nut. I contact Pyramid and they requested photos and these were duly sent with the measurements. Pyramid admitted the kit was not suitable for the 400/4 despite their listing stating it was and gave me my money back. This was the same kit many have used on here. Pyramid agreed with my findings that it could be dangerous.
I bought a set of caged ball bearings in the end and they fitted perfectly using a 2mm shim on the lower yoke.
I have contacted Pyramid a couple of times since to request an update and I also voluntered to try the stepped bearing they were proposing but they told me they are currently speaking to several restorers of these machines to obtain a solution. Needless to say I had a pig of a job to get the taper races out of my newly powder coated frame!

--- End quote ---

I believe a member here fitted a Pyramid kit to his 400 without issues I think it was oldchuffer? Anglesey way. My 400 ended up with the caged lower ball race and a taper top as the none pyramid kit left not enough  top thread.

davidcumbria:
My lower shock bushes pressed out without difficulty after 50 years using two sockets in a vice after heating the area using a mapp torch. Cheap to replace and you are having frame repainted anyway. Gets round all the hassle documented by some other methods

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