Topic: Paging all fabricators and other clever folks

[camelman]

I'm trying to mount front CB400f turn signals to aftermarket headlight ears on a bike I'm building for a friend.  The stock turn signals have a 21 mm diameter mounting hole that originally slid onto a tubular frame (the CB400f and CB360T both had the same assembly).  I don't have that frame anymore, so I need to find or machine two posts that are 21 mm in diameter, hollow so the wires can go through, and threaded on one end to accept a 12 mm nut (10mm and 14mm work too).

So, any ideas?  In case I didn't tell you guys before, I think you're the best.  And I'm not just saying that to try to get someone to offer to build a set of posts for me.  ;-)

Camelman

[wookie]

Have you tried drilling a bolt thru?  Mild steel bolts are not that difficult to drill, or you could also try threaded rod in the right pitch.

[camelman]

I considered that, but I need to leave a length of tube showing to move the turn signals out a bit, and I'd rather not expose the threads for aesthetic reasons.  I'd like to have a smooth post showing.

Camelman

[fastbroshi]

   Is he just in love with the stock turn signals and nothing else will do?  If that's the case, maybe try putting a bolt in each headlight ear and sandwich it in there with the grounding nut and anoother nut.  You'd have to have a certain length of bolt so no threads would show.  If you just have to have a smooth post, just use a longer bolt and a hollow spacer.   More of the bigger chains are carrying them, though they're not to common.   The True Value and Ace type places usually have them in the size you'd need.  

7/8" = 20.955mm, fyi

R side:  signal - spacer, nut { -bolt - nut  0 nut - bolt - }nut, spacer - signal : L side


Edit - forgot to say, drill the bolts.

[Toxic]

Yup I would say your best and easiest solution is the threaded rod cut to the right length and then a metal or plastic spacer / tube to slide over it and hide the exposed threads.

Take your parts in a bag and wander around your local big box hardware store.

We are lucky where I live as we have a "metal supermarket". It's mainly for tradespeople but is open to the public.  They have never let me down.  It is an international chain of stores so try googling it.

[camelman]

Great ideas. Thanks for the input.

He is really keen on keeping the stock parts aside from the modern front end I swapped on from a z1000 (I know... it is blasphemy). I'll put up pics when I'm done.

Camelman

[hesselfuzz]

I just got a cb400f and know exactly what your looking at. The tube looks suspiciously like 3/4" conduit to me which you can get at any electrical supply or Home Depot. It's soft and easy to work with, too.