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Inverted forks on a Road King

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Old Nov 24, 2016 | 11:26 AM
  #1  
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Default Inverted forks on a Road King

Not a lot of examples out there. I can find many examples of E Glides and Road Glides but very little for Road King. Do any of you guys have this set up? Could you post a couple pics please?

Thanks
Sam
 
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Old Nov 24, 2016 | 02:52 PM
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Originally Posted by mcmahost
Not a lot of examples out there. I can find many examples of E Glides and Road Glides but very little for Road King. Do any of you guys have this set up? Could you post a couple pics please?

Thanks
Sam
Yes, I do. I am using new Ohlins forks w/30mm cartridges in them. My triple tree design also used 49mm forks. I designed mine from the ground up to work in a Road King which is the hardest to do. I have been installing inverted fork in Baggers since 2008 and my first customer was a pitcher from the 1999 World Series Yankees who owns a Road Glide. He puts on 45K MI per year as he has 7 months to do it in back than, so I was told.

There are 3 persons on this forum who used my triple tress and 49mm forks w/30mm cartridges on this forum with no issues. Same trees but different bore in the trees. I pass my design to a mechanical engineer than a metallurgist for final approval. In this case we make a investmant cast mould and pour it in Oregon. We than machine the bottom tree, and make the rest of trees & parts here in Boca Raton. We use 7071 T6 upper & 17-4 PH bottom. I have the steering stem welded in the bottom tree and a separate top bolt steering stem due to the accuracy needed with a raked triple tree and straight through (not on angle) fork tube mounting unlike other offerings. The bottom tree is recessed above the bottom of the steering neck for a longer stroke option so the fender does not hit the tree. I engineer my parts and do not just drill holes in a chunk of aluminum.

I worked on my new set of Ohlins forks yesterday, working out ABS sensor clearance and centering the calipers/rotors on the hub as we use radial calipers where horizontal caliper spacing is not possible. The key lock works like stock. I will put on my Nacelle when I go to the shop next. I will also install this fork onto my own Road King. I have several new KYB inverted forks with either axial or radial caliper mounting and all have 25mm KYB fully adjustable cartridges in them. Here is an example of the trees and Road King nacelle installed.


 
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Old Nov 24, 2016 | 04:30 PM
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Default RK

Awesome. Thanks. I look forward to seeing the finished product.

Mine is a 2011 Road King Classic with ABS.

Sam
 
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Old Nov 25, 2016 | 03:05 AM
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Default Time

Ran out of time yesterday. The finished product has been on this forum 3X with 3 different persons but have 2014~Current 49mm forks w/Ohlins NIX 30mm cartridges in them. There will be no difference in fitment on the trees other than the fork tube bore. As stated previously, I have been doing a steering stem behind the trees since 2008 and am no stranger to inverted forks in a bagger. That model has 4 degrees of trail @ 26 degrees of rake. It is very responsive in handling but not as sedate in cruising. This current model was designed to be much better at putting on long miles as what a bagger should do. Trail is the most important thing to think about when designing your bike to operate differently than originally manufactured. When the steering stem is in front of the forks the front tires friction is always pushing back and straightening the bike making the steering feel heavy compared to a Dyna/Sportster with the steering stem behind the forks.

I will be at work Monday and may put the nacelle on the assembly and snap a picture. The fork stop works as stock on your 2013. I started working on the ABS module at quitting time Wednesday (shorter day). There will be no difference in handling between the 49mm fork and Ohlins inverted fork goes as both have the same rake & trail.
 
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Old Nov 30, 2016 | 06:42 PM
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Default Update

This picture is from 11.28.16. I had stuff to do, building shocks and things but I have the car loaded up and full of gas to bring stuff to the shop tomorrow am, Thursday. I will be working on the ABS spacer and fender mounts. My idea is a carbon fiber front fender for under $160. They also weigh in at around 8 ounces. There is no difference between the 49mm & Ohlins NIX 30mm inverted fork as it is the same length including sag and same fitment as clearance is a non-issue. All FLT motorcycle models from (this model triple trees) 1986~2013 will be direct bolt up.


Sorry for the bad picture. But this is my 49mm forks with a Road King nacelle with everything aligning up as it should be.
 

Last edited by FastHarley; Nov 30, 2016 at 06:48 PM.
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Old Dec 28, 2016 | 10:01 AM
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Totally looking forward to more info on this! Gonna be a kick *** setup! Sub'd
 
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Old Dec 28, 2016 | 04:09 PM
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Default Just got back

I just got back from the machine shop redesigning some swoopy fender brackets. Our first try was just locating the parts from scratch on how to secure the fender to the forks. This means locating the mounting holes and how to space it out. 3 hours.

The next thing is to make a set of prototype brackets to secure the fender to the forks. I than stepped back to visualize and took pictures. The brackets were made out of aluminum 1/2" rod & 3/16 aluminum plate, welded together and after yanking it decided it will work and all spacing and rigidity was physically tested. After that part I took pictures to digest the design for a few days (Christmas). This is what it looked like. I am using a 8 ounce FLT look a like front fender because I want the wheel to move up and down with as least weight as possible. These are C/F wheels that weigh in at 2.4# (F) and 2.7# (R). The holes are where they need to be and it is correctly spaced out to the center of the wheel. It looks like ****. Fab & draw 6 Hrs.





When I firt started designing this whole package I wanted one size fits all FLT Batwing, FLT Roadglide, Road King, using any working FLT 41mm, 49mm, and either Ohlins specific inverted fork or OEM specific inverted fork. I have many 49mm forks with 30mm Ohlins NIX cartridges so I already know how these will handle over a 3 year period. all headlight angles are the exact same and my kits require about 15min. of motorcycle modifications that most riders can handle. Because of the larger diameter forks they just can not fit and the locking plate must be trimmed on the frame.

Session 3. Look and go back to basics as the aforementioned fender bracket must be stylized by first marking the least amount of stressed points to hold the fender on at speed. Now draw circles where those points must be. Change the angles and mass. Now figure out how to manufacture it where it looks the best to me. No skulls or HD Bar & Shield. What is the least amount of weight without creating drag. I have it on MasterCam. 3 hours.

I will use a combination of waterjet and machine parts made all out of polished stainless that is welded together as one unit. I have to wait until after the holidays for those people to come back to work.
 
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Old Dec 29, 2016 | 05:48 AM
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Originally Posted by austinjosephlee
Totally looking forward to more info on this! Gonna be a kick *** setup! Sub'd
It's only a short ride down to FLA to see them for yourself......
 
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Old Jan 23, 2017 | 08:45 AM
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moto any more updates??
 
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Old Jan 24, 2017 | 07:39 AM
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Default Polishing

Originally Posted by serviceguy85
moto any more updates??
I designed good looking air flow looking brackets out of 304 stainless & after manufacturing 5 sets, I brought them to the polisher where they are now. I have many examples of these trees out on 49mm forks and expect no difference in handling as my 49mm forks have the exact same 30mm cartridges as the newest (most) Ohlins Forks have. I have tested the 49mm fork which is much better in rigidity than the 41mm forks as we all know. The 49mm forks work well and flex little up until 130mph. You can PM tj316 with his new worked over 120ci from Cycle-Rama Inc. I personally believe the 49mm will work well as long as you keep it under 130mph. The radial mounted calipers work better that are on an inverted fork than axial mounted calipers which are on a Harley slider due to the caliper choices, design, and most importantly superior mounting rigidity.
 
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