Anyone know the OD of the fork lowers 919? - Wrist Twisters
 
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post #1 of 8 Old 01-16-2012, 02:41 PM Thread Starter
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Anyone know the OD of the fork lowers 919?

I'm looking to mount fog lights on my 9er. I want to mount them as low as possible. Somewhere near the caliper. I think that will work best for fog and will allow me to keep the lights running while passing oncoming traffic.

The uppers are 43mm right?

Does anyone know the OD of the 919 fork lowers or have any way of measuring?

I'm also looking for a rubber, or otherwise insulated clamp to mount lights onto. Any ideas? They need to be insulated so they don't ding my powercoat.

Thanks,
Craig.

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post #2 of 8 Old 01-16-2012, 03:54 PM
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Quote:
Originally Posted by BlackRig View Post
I'm looking to mount fog lights on my 9er. I want to mount them as low as possible. Somewhere near the caliper. I think that will work best for fog and will allow me to keep the lights running while passing oncoming traffic.

The uppers are 43mm right?

Does anyone know the OD of the 919 fork lowers or have any way of measuring?

I'm also looking for a rubber, or otherwise insulated clamp to mount lights onto. Any ideas? They need to be insulated so they don't ding my powercoat.

Thanks,
Craig.
Why mount fogs so low ?
Fogs are better higher so the top cut can be slightly angled down and still give the range you want.
Spots can be lower and project parallel or even up a bit.
My guess is that you're thinking lower leg = less lamp movement, and if you are, think about your headlamp being OK where it is.
You could go with a 43 mm clip on mounted to the tube between the clamps and use that as your mounting platform.
Lower leg mounted would also increase your unsprung weight, but that's of no matter for touring, especially considering how light the lamps are these days.

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post #3 of 8 Old 01-16-2012, 04:32 PM
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blackrig, i think twisted throttle has some brackets that allow you to attach lights to the fender bolts where the fender bolts onto the fork lowers. check those out.

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post #4 of 8 Old 01-16-2012, 05:02 PM
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The easiest way to mount the lights would be with a bracket held by the upper caliper mounting bolts, with 8mm x 1.25 bolts longer than stock by the thickness of the metal of the bracket. Then route the wires (covered by a suitable protective sleeve) tied to the brake hoses. The only problem you may have is bulb life issues due to the greater vibration of the road shocks generated by the wheel. it is, after all, unsprung.

An alternative is mounting to the lower radiator / front engine mount area.

Rob

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On the other hand, if it has not been done never assume it is impossible to do it.
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post #5 of 8 Old 01-16-2012, 05:23 PM
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post #6 of 8 Old 01-17-2012, 01:40 AM Thread Starter
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mcromo44, I want to mount the fogs as low as I can because I'm trying to keep the glare down as much as possible. When I ride in the fog now, my headlight becomes a beam of blinding light reflecting back onto me. I Think if I mount aux lights at the same height it would only add to the glare. I could be way off on this though. I really haven't done any research on the topic.

Edit:
VClassics Interactive - Archive

Hey Rob, I also thought of using the caliper bolts and a simple bracket. I tend to get superstitious with modding things like that but it is looking like the best option. Do you have a recommendation for the grade of bolts used?

If you guys are interested, here are the lights I'll be using.
http://www.amazon.com/gp/aw/d/B004DE...6792938&sr=8-1

They're rigid dually's. It was between these or vision x single LED. My wife bought me the dually's for Christmas, so that was the deciding factor. They are really bright, nearly indestructible, and low power draw. They have a few torture tests on you tube. Pretty cool.

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post #7 of 8 Old 01-17-2012, 07:23 AM
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Quote:
Originally Posted by BlackRig View Post
mcromo44, I want to mount the fogs as low as I can because I'm trying to keep the glare down as much as possible. When I ride in the fog now, my headlight becomes a beam of blinding light reflecting back onto me. I Think if I mount aux lights at the same height it would only add to the glare. I could be way off on this though. I really haven't done any research on the topic.
A good fog has an absolutely flat top cutoff, a horizon cut off so to speak.
Angle that down, and it can't reflect back or up.
It's stray light, or upward directed light from lousy lights that lights up the fog ahead of you.
Suggest you check a couple of manufacturer's web sites, where you can get install heights for lamps.
Try Hella, my guess being they'll have decent info easy to find.
Top of the fork leg zone is probably a decent height, while axle level mounting would be too low.

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post #8 of 8 Old 01-20-2012, 02:01 PM
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Get a couple of those 43mm leg clamps used for steering dampers and mount them just below the lower triple clamp.

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