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TWISTING FORKS, IS THIS ANORMAL THING ON THE 400/4?

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Laverdaroo:
I'll have a revisit and try to throw some grey cells at it and come back on here to get a sense check. I was given the bike by a pal at which point  the  Mrs bagged  it as as shews only got a small inside leg, it fits her perfectly with her feet on the ground. She saw the enclosed and wants a slightly revised version of this fine looking Honda (although a 550 I think.)

Its been a great build so far with plenty of head scratching and trying out new techniques, I have vats of stuff electroplating gurgling away behind me and all sorts of this n that being fiddled with to get the result she wants bless her.
I saw this bike on Pinterest and thought it was a great look and saves me a heap of cash replacing and fixing all the bits that were knackered on the original bike. I'm a bit of a standard trim bloke (with a pipe!) but this has been great to do as its a bit of a blank canvass.

Laverdaroo:

--- Quote from: K2-K6 on March 27, 2021, 12:07:50 PM ---Presumably brake arm and it's pivot are free to move,  that's what makes the caliper action independent of the fork rotation. Spindle needs to be clamped fully with the clamps fitted in correct alignment too. They are usually arrowed for direction.

Fork bracing is a myth in my view,  the "brace" on a mudguard doesn't remotely have a load line that can help.  It's just to competently hold the mudguard and prevent that from getting near the tire.

They where obsessive about bracing in that period, and completely illogical in making aftermarket rubbish to sell.

--- End quote ---

I'm kind of with you on the brace thing and they look ugly, I had a micron one on the LC years ago, couldn't tell the difference on or off TBH, and it wasn't ridden slow by any stretch of the imagination ;D

Yes all the pivots are beautifully free moving and all works as it should as far as I can see but just thought I ask the question...like you do when you're caught out, LOL

Laverdaroo:
Right,

sussed it!
Old silly bollox here had not only put the threaded spacer back in the wrong way round but hadn't threaded it onto the spindle either!  That's what burning the midnight hours does after a stupid o'clock start! All back together and sweet as a nut and running true. Thanks for the pointers chaps, much appreciated, I'll go get me coat! ;D

K2-K6:
"I'm kind of with you on the brace thing and they look ugly, I had a micron one on the LC years ago, couldn't tell the difference on or off TBH, and it wasn't ridden slow by any stretch of the imagination ;D"

It was an odd period of "marketing" triumph over reality I feel, taking no notice of the dynamic in play from structure and geometry.

If stanchions aren't strong enough to resist the forces of the bike,  they'll move anyway braced or not. A single disc is looked at as imbalanced too when it only puts the forces into the hub in it's entirety,  which is acting on the tire patch, which is aligned centrally with headstock axis. That's just how the geometry works to stay stable.

The above you can see if you use a single sided fork (mtb "leftie" and various scooters ) where they run exactly the same as two legs with absolutely no structure on the other side at all.
I use a mtb leftie, with the amount of people that point out to me that it can't be safe and they wouldn't trust it surprising me. When I suggest that they think it's normal to drive a car, all of which have their wheels supported on one side, it usually still has them muttering in their own convictions.  :)

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