SOHC.co.uk Forums > CB500/550

CB550F Double Disc's

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Johnwebley:
I managed to get the original speedo drive from CMSNL.com   last year,

 they had several in stock,

 and I did have to trim the outer of it,and also file the disc carrier to take it

Bryanj:
Now you say that i remember having to take small amounts out of the disc carrier centre to make rectangular holes for the drive Tangs

Ewan 500 K1:
I suppose a Q for trigger would be ... what kind of front hub do you have ... is it the version with the two flats on it (see photo in my post above) .. or the version without the flats ?

Trigger:
Ewan, I have the same hub as showing in your post.  Oddjob, i was only joking about pulling it in on the disc bolts. You are right, how the hell did he do it without any mods? I think he was telling porkies.

matthewmosse:
I did a twin disk setup on one of my cb550k3's many moons ago, I used comstar front wheel though so no usefull hints off that other than that I think I used a stock master cylinder, worked ok for a commuter, to be honest though I think a single disk works pretty well anyway - I coud lock the front tyre even with a sidecar fitted, the stainless disk was the thing I might change if looking for inprovement, but only during rain as I used to have to lightly apply the front brake all the time in a downpour if I wanted it to work immideately on demand. Once you master the mindset of doing it it was second nature to keep light braking pressure on 200 yards before every bend or blind spot. I do know that my bmw of the same era had the same issue, though less as twin disked and drilled from the factory and for these you could buy pfm performance disks which  being cast iron looked horrid at the mere mention of rain but gave better braking. I had a set but never used them.

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