SOHC.co.uk Forums > CB350/400

400 F2 rear Brake torque arm

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McCabe-Thiele (Ted):
Out of interest what is the distance between the bolt hole centers of the one in your spares box?

Oddjob:

--- Quote from: andy120t on May 25, 2025, 09:07:47 AM ---I'm sure I have one somewhere that's just a flat bar, or with a rib down the middle. Is that a 550 of some sort - no danger of it rusting from the inside, and easy enough to make up a replica.

--- End quote ---

550F1 Andy. The 550F2 went back to the tubular shape but was black for some reason, same part fitted to the 550K3.

exvalvesetdabbler:
Total Length 394 mm
Bolt hole centers 365 mm

In terms of weak points, I would expect the mounting on the swing arm to break first given how thin that is around the bolt holes.

Surprised no one is making them out of stainless.

Regards
Dave

McCabe-Thiele (Ted):
That's interesting Dave, I've just checked my NOS CB400NA Superdream brake steady arm.
It's in an unopened bag with Honda Part number 43431-413-010 it's Black it measures 395 in length, 365 between bolt centers.

CB400/4 part  number is 43431-333-000.

That information makes my NOS brake arm the same as a CB400/4 so probably a much wider market for selling, mine cost me £29.95. I bought it as mine was badly corroded, my replacement swing arm was as new, it came with the steady arm attached.

Last thing to cross check will be the diameter of the holes - that's for another day.
The CB500 K1 has part number 43431-333-000 it would not surprise me if the 43431 part numbers are common as they are all the same length though possibly not all in the same colour.

Oddjob:
Sorry to burst that bubble Ted but the first 5 numbers denote what it is, so every Honda torque arm will begin with the same 5 numbers, as do all seats or petrol tanks for instance. The 3 middle denote the model so the 500 should be 323 not 333.

There will be a difference between the 250 and 400 arms though or it would have matching numbers, bolt hole sizes would be a good bet.

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