SOHC.co.uk Forums > CB350/400

Cross drilled discs

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McCabe-Thiele (Ted):
Just read the bit about your slipped disc Allan (I'm told the disc does not slip as such - it's a complex  condition with a simple name for none medical folk)- Jesus that's not good news is it - are you having the rod operation with fusing two vertibrae or is it something a bit easier - either way all the best with the operation.

You will have to put on hold the engine switch I guess until well into the new year - take care Buddy were only born with the one skeleton look after yours. Cheers Ted

allankelly1:
Hi Ted

It’s not too bad

A disc has moved and is compressing my spinal cord so I have lost all sensation in my R/H leg and some movement too

The op is call lumber decompression where they are going to cut away the part of the disc that is compressing the spinal cord to release the pressure

It just hurt like hell unless you keep taking the smarties and have been working / living with it for the last two plus weeks due to work commitments but now going to work from home as support remote till I am fit enough to return


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Yoshi823:
Back in the early '80s I converted my CB550F1 commuter bike to twin discs. I made up a template subdividing the swept area & then, using my skills from my school days doing technical drawing I drew the pattern that I chose to use. I then centre punched through the template & on to the swept area. The results are as seen



Having drilled my own discs it was not at all difficult & I reused the same template on other friends CB500 & 550 bikes. I have also done my brother's GS1000S discs & a friend's CBX1000ZA & those on my CB750F2, using the same method.

K2-K6:
The stainless used for discs is generally very tough, I've never seen failure in one that's not been worn to severe excess whether drilled, slotted, skimmed or anything else. It appears that in the scenario given of global collapse when only cockroaches are projected to still exist,  then they'd probably be sheltered under old Honda discs  :D

Another application, downhill mountain bikes, use a very lightweight structure for demanding use

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225mm diameter, floating and mounted on aluminium centre.

Using this type of caliper,  six titanium piston, milled from billet single structure

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Similar developments in motorcycle

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TrickyMicky:
Dp you really need that on a 45 year old, 400cc, vintage motorcycle, which I assume is going to be used on a public road? If it's just for looks and an engineering exercise, I wish you well.  If your riding/driving needs these types of brakes????

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