Lower fork clamp

Racing K Models

Re: Lower fork clamp

Postby No side stand » Sat Oct 20, 2018 3:07 am

Thanks hogoct.
Can anyone post a picture of the lower clamp...not in a bike.
Steve
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Re: Lower fork clamp

Postby No side stand » Thu Oct 25, 2018 7:59 pm

Ok. Failing that, does the R lower clamp have the fittings and threaded holes for the headlight shroud?
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Re: Lower fork clamp

Postby hugoct » Fri Oct 26, 2018 9:26 am

Standard lower clamp casting with ears for mounting the tops for the dust boots.
The holes for the fork tubes are machines at a 3 degree angle from parallel to match the holes in the top clamp.
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Re: Lower fork clamp

Postby No side stand » Fri Oct 26, 2018 3:58 pm

hugoct wrote:Standard lower clamp casting with ears for mounting the tops for the dust boots.
The holes for the fork tubes are machines at a 3 degree angle from parallel to match the holes in the top clamp.


Hi hugoct. Thanks for the interesting information on the 3 degree of fork angle. Is that fork angle information written in one of the R manuals. If not, where did you procure it from?
I have re worded my original query...Does the R lower clamp retain the boss on the outside edge of the fork clamp for the headlight shroud or is it smooth?
Regards Steve
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Re: Lower fork clamp

Postby EKHKHK56 » Fri Oct 26, 2018 4:41 pm

I have seen them in Factory photos. With bosses. Shaving was always an option.
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Re: Lower fork clamp

Postby hugoct » Sat Oct 27, 2018 1:46 pm

The 3 degree angle is from the blueprint.
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Re: Lower fork clamp

Postby No side stand » Sat Oct 27, 2018 5:24 pm

hugoct wrote:The 3 degree angle is from the blueprint.

Marvelous information hugoct. Thanks for sharing.
Steve
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Re: Lower fork clamp

Postby EKHKHK56 » Sun Oct 28, 2018 9:09 pm

I have some K Tree Examples. First year one -52 Lower with 4 small screw holes for Cow Bells. Needs matching Top Clamp. I'll show 2 early varieties. Also have 52A example showing stem angle difference. Has -57 Mod for rear Fork Boot Breather. Ok. Sounds more like a -54C! 54-B should
Match -54 top but still 4 small screw holes for F
holding Boot Clamp w/o large breather hole in rear which came on Sportsters. -57 K stuff. Also note lower Top Clamps. Even though Shaved, there are two -52 Early Styles. And 2 -54 styles. One cast only. One welded from factory. Ok yeah it's fun. Erik
Attachments
20181028_163415_resized(1).jpg
Early "Raked" 2 Tops & Bottom. 2nd Clamp Shaved but Different
20181028_163415_resized(1).jpg (262.63 KiB) Viewed 2698 times
20181028_163422_resized(1).jpg
1957 up Lower Tree 2 Tops -54

-54 Top Clamps. Top Welded 2nd one same but not Welded & Shaved Lower Tree-57 & up
20181028_163422_resized(1).jpg (263.69 KiB) Viewed 2698 times
20181028_163110_resized.jpg
Tube Angle
20181028_163110_resized.jpg (242.69 KiB) Viewed 2698 times
Last edited by EKHKHK56 on Thu Nov 01, 2018 2:17 am, edited 1 time in total.
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Re: Lower fork clamp

Postby EKHKHK56 » Sun Oct 28, 2018 9:13 pm

Top Photos 2 "Raked" 52, 53. 2 -54 One welded, one not. Bottom is shaved but not in weld area around stem hole.
Attachments
20181028_163435_resized(1).jpg
52, 53
20181028_163435_resized(1).jpg (241.8 KiB) Viewed 2698 times
20181028_163429_resized(1).jpg
-54 Tops One Factory Welded, Shaved one Not
20181028_163429_resized(1).jpg (246.65 KiB) Viewed 2698 times
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Re: Lower fork clamp

Postby No side stand » Wed Oct 31, 2018 11:54 pm

At the fear of being labelled the slow kid of the class, I have to ask... How do I positively identify an R lower fork clamp.
Are the early K model lower clamps eg ( 45707-52 ) used as the R clamp for all KRTT, and XLRTT bikes?
Or is it something else.
Sorry teacher, but as soon as you say “Now pay attention”....my eyes glaze over. :oops: :shock: :geek:
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