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Old 12-01-2012, 11:44 AM   #3196
Kai Ju
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Upper triple clamp

Do you have any pictures of the lower clamp being used as an upper ?
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Old 12-01-2012, 12:49 PM   #3197
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Quote:
Originally Posted by Kai Ju View Post
Do you have any pictures of the lower clamp being used as an upper ?
Modded a \5's lower tree for use as an upper tree a few years back. Milled the steering stops away, a recess for the steering stem bearing cap, drilled some holes for the bar mounts, milled a flat area for same, polished it up, flopped it over and that was about it.

Looked like it belonged on the \5.

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Old 12-01-2012, 01:27 PM   #3198
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Quote:
Originally Posted by Kai Ju View Post
Do you have any pictures of the lower clamp being used as an upper ?

This is the best I can do.


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Old 12-01-2012, 09:54 PM   #3199
Kai Ju
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Steering stem hole

So how close is the steering stem hole in diameter to being correct for the top of the stem ?
On most Japanese bikes the steering stem is a larger diameter at the bottom then the top.
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Old 12-02-2012, 03:42 AM   #3200
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Sorry mate, I can`t help you with it took to make it fit, I only know that it was done and it is an unusual modification.
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Old 12-02-2012, 10:07 AM   #3201
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Quote:
Originally Posted by Kai Ju View Post
So how close is the steering stem hole in diameter to being correct for the top of the stem ?
On most Japanese bikes the steering stem is a larger diameter at the bottom then the top.

It's a single diameter top to bottom (same bearing).
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Old 12-02-2012, 11:12 AM   #3202
Kai Ju
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I guess I'll start looking for a lower stem, thanks.
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Old 12-02-2012, 11:38 AM   #3203
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Quote:
Originally Posted by Kai Ju View Post
So how close is the steering stem hole in diameter to being correct for the top of the stem ?
On most Japanese bikes the steering stem is a larger diameter at the bottom then the top.
Kai Ju;

Are you meaning the hole in the lower triple tree that the steer shaft goes into?

If so, that hole is a few mm larger. I can't remember the exact dimension, but when you install the steer shaft into the lower triple tree, most of the shaft will slide through, but the last bit is a press fit.

For a lower triple to work on the upper end, you will need to fabricate a spacer to make the diameter of the shaft hole smaller. Or put a bushing onto the shaft at the top end.

Cheers
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Old 12-02-2012, 01:42 PM   #3204
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Thanks for the heads up.
But it almost sounds like it'll be a really close fit as is.
I'll report back when the time comes.
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Old 12-02-2012, 04:33 PM   #3205
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Sorry Kai Ju, but close is not good enough for the steering head.....even though you might be able to get the correct tension on the bearing, the top triple could rock forward/back with brake application due to incorrect shaft/hole size.

I'm also not 100% on this as it has been almost 15 years since I did the last steer head bearing on my Airhead. I do know it was a press fit for the steer shaft into the lower triple.

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Old 12-02-2012, 05:21 PM   #3206
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Quote:
Originally Posted by Droptarotter View Post
Kai Ju;

For a lower triple to work on the upper end, you will need to fabricate a spacer to make the diameter of the shaft hole smaller. Or put a bushing onto the shaft at the top end.

Cheers
If you're using airhead parts, the steering ass'bly top nut has a shoulder that fits the bore in the clamp that needs to be machined to suit. The shoulder\bore fit is critical, as this is what locates and holds the clamp in position on the steering stem.
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Old 12-02-2012, 08:36 PM   #3207
Kai Ju
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I didn't mean to give the impression that close is good enough, I've been wrenching and riding long enough to know better.
Don't worry, it'll be done right or not at all.

Thanks Lornce, I forgot about the shoulder that goes into the upper clamp, it will hopefully make that lower work on top.
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Old 12-02-2012, 10:12 PM   #3208
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I'm curious about the top (bottom) clamp in this picture, though. Looks like it's a press fit. How would you fit it?
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Old 12-03-2012, 05:45 AM   #3209
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There's a fellow in NoCal that's done this with his /5, yoke lower used as upper clamp... looks beautiful, great job.

He did it maybe eight or nine years ago. I traded email with him at the time and IIRC he did not recommend it due to the surprising amount of critical machining required.
i.e. the stanchion bores center-to-center need to be the same on both, closer than the original manufacturing tolerances.
(There's a work-around for this scenario... one can shim a quadrant of the bore(s) as necessary, which is helpful when fitting the aftermarket top clamps.)
And then there the stem nut recess issue Lornce mentions.

Nothing you can't handle but you might contact the guy... Blaise D. if I recollect correctly.
He posts at http://autos.groups.yahoo.com/group/norcaltt/
some good pics to be found there, his toaster included.

HTH,
-Scott
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Old 12-03-2012, 10:17 AM   #3210
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Here's a pic I stole off the web... very clearly shows the /5 setup, since he used clamp-on bars...




....one of the theoretical purposes of this mod was to be able to slide the tubes up, lowering the front end, since the "top" now has the tube-clamp system. Obviously the top clamp is much beefier than the stock flat-steel!
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