SOHC.co.uk Forums > CB750

Spoke advices please.

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Lobo:
Been deep cleaning the ‘fleet’ this week, and as always the odd issue gets noticed...

On the K2 an outer (SS) spoke is broken (Rear wheel) - which is now removed.

Q1. Whilst I find / order a replacement, comments on riding the bike (sensibly) in this state? (Fact - I may have been riding like this for weeks 😂)

Q2. The original supplier was Centralwheels; their stock shows NIL, but worse, they only quote a full set @ £85 + postage. Any ideas where I might find (eg 4) of these outer SS spokes, the length is abouts 145mm, with the >90 deg end, and 3.6mm dia / single butted at 4mm.

Q3. Is is possible to get the CB750 rear wheel back on without removing the (metal) chain guard! Tips here?

Q4. One for the chemists... stupid details aside I’ve inadvertently mixed a bottle of Isopropyl & a bottle of (clear) methylated spirits 50/50. Doh. Is there any use for it... cleaning etc... or best disposed of.

Thanks all.

hairygit:
Answer to Q1. do NOT use it on a public road now you have mentioned it on here. Anyone can read that statement without being a member, so IF you were involved in any kind of incident, your insurers would just laugh at you, as you have used it KNOWING thee is a potentially dangerous fault in it. Insurers and other agencies have software which can scour the net for that kind of thing, and they do use any means to escape liability.
On to Q4, treat it as meths, don't drink it, avoid prolonged skin contact. Great for cleaning, degreasing, burning in spirit lamps/camping stoves etc

Sent from my POT-LX1 using Tapatalk

Lobo:
... thanks Hairy - fair point if a single missing spoke is indeed considered dangerous. I’ll err toward caution and heed your advice.

Dang on the alchemy question drinking advice as I figured I’d invented a new 🍸 Cocktail....

hairygit:
Well, 40 bits of metal not much thicker than piano wire, all under equal tension is all that stops the wheel collapsing under a quarter of a ton of bike, that's without the weight of rider and passenger, the shocks from bumps in the road, and the forces of inertia when cornering/acceleration or braking. Those little bits of metal have incredible forces going through them, enough that Honda fitted 40 of them, and the 36 on 400/4 and below would never support the stresses of a 750.

Sent from my JNY-LX1 using Tapatalk

MrDavo:
I was speaking to Bill Swallow at the Classic TT some years ago, he had just finished on the podium, riding an Aermacchi, I think.

Apparently his pit crew noticed a couple of broken rear wheel spokes during a mid race pit stop. By the time the race had finished there were many broken spokes, and the wheel was on the verge of collapse. Bill had thought the handling had become a bit odd, but not enough to slow him down.

My H-D has very thick spokes indeed, as you would expect. There was no way in the world I was going for cast wheels though, nowhere near retro enough.

Try the cocktail with tonic ice and lemon, and get back to us, if you can still type that is.

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