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Fork Clamp Diameter

Posted: Fri Mar 04, 2011 12:32 pm
by Tirpitz
I'm posting this up to help anyone looking to getting a fork leg clamp for a steering damper for an L model. I've seen some posts suggesting that a 50mm clamp is required. If you measure the circumference of the fork above the bottom yoke there is a small wider bit, then it tapers to a slightly thinner profile. There isn't enough remaining free wider section, to which the bottom yoke is clamped, to accommodate the steering damper clamp, so you need to be positioning it a little higher on the thinner section. The circumference here is 162mm, which gives a fork diameter of 51.5mm. A 50mm clamp is not really the right one and isn't going to fit right. I've just bought a 51mm one and it fits perfect, so IMO that's the one to go for.

And if you did want to squeeze the clamp on the wider section of the fork, which has a circumference of 165mm, a 50mm one would appear to have even less chance of fitting.

Re: Fork Clamp Diameter

Posted: Tue Dec 06, 2011 5:23 am
by OzzyDave
I bought a 50mm one from FleaBay.
http://www.ebay.com.au/itm/260882093076 ... 1439.l2649

This is it fitted to my '89 H1.

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Had to do some surgery to the side fairing to get the damper to fit.
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The damper was a cheapy, also from FleaBay. Since installing it, i've noticed a big difference in front end stability.
http://www.ebay.com.au/itm/160676396926 ... 1439.l2649

Re: Fork Clamp Diameter

Posted: Tue Dec 06, 2011 8:18 am
by Mori Man
shocking

Got your clamp sitting way to high hence cutting your cowl required.

Clamp:
50mm for H
51mm For L

The straighter you mount your damper the better effect it has , hence the sportbikes now putting them across the top bridge as they sit neigh on level.

Re: Fork Clamp Diameter

Posted: Tue Dec 06, 2011 9:28 am
by OzzyDave
If I placed the clamp any lower I'd have needed to cut away much more of the cowling. Would have liked to have a steering head damper but as I'm sure you know, the nose cowling supports are smack bang in the way.

Re: Fork Clamp Diameter

Posted: Tue Dec 06, 2011 2:21 pm
by Mori Man
OzzyDave wrote:If I placed the clamp any lower I'd have needed to cut away much more of the cowling. Would have liked to have a steering head damper but as I'm sure you know, the nose cowling supports are smack bang in the way.
You can see mine here - no cutting required :smt001

viewtopic.php?f=87&t=12363

MM!

Re: Fork Clamp Diameter

Posted: Tue Dec 06, 2011 8:28 pm
by OzzyDave
A-ha. That would be because you invested In a good quality damper and brackets where I went for cheap as. My bike is a fugly duckling anyhoooo so a bit more chopping of the cowling dint bother me. Function over form :smt001

Re: Fork Clamp Diameter

Posted: Tue Dec 06, 2011 11:24 pm
by Mori Man
:pmsl

Form always beats function :smt002

Re: Fork Clamp Diameter

Posted: Wed Dec 07, 2011 9:25 pm
by Tirpitz
shocking WTF!

Re: Fork Clamp Diameter

Posted: Wed Jan 25, 2012 10:53 am
by OzzyDave
My cheapie Flea Bay damper turned to be crap. Why am I surprised. Sure it worked well for about a month but them turned to sh*t. Became all notchy and felt like I'd overtightened the head bearings by double. So watch out for "Corbid" dampers for ~ US$50. Not worth it.