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Re:Rear Fender Mod .....
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TOPIC: Re:Rear Fender Mod .....
#1023063
ctkog (User)
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Rear Fender Mod ..... 3 Weeks, 3 Days ago  
Just putting this out there. I've designed a simple rear fender mod kit that puts the fender nicely over the back wheel. Still strong for 2-up. It was the right answer for my wife and I to keep the stock travel yet for me to have that "lowered" look I like. My sig pic below was when it was actually lowered. But my profile pic is with the stock height and just the fender mod kit. You can see it looks lowered about the same, but it is not.

I was thinking of machining a couple sets for a couple roadstar members to give a try, at no cost, in order to give full thumbs up, or any feedback to help refine it, make any final adjustments, then make more. But then they won't be free lol. PM if interested in being a guinea pig and we can talk more about it.

And questions from the group feel free to ask. It's not like I'm going to patent the thing.
 
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#1023068
Father_Pobasturd (User)
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
PM sent. Great idea, however, I do have some concerns.
 
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#1023076
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
 
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#1023086
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
roadiemort wrote:
http://roadstarclinic.com/content/view/36/94/

That's a completely different approach! Not to knock it because it IS a step in the right direction, and I commend the idea, but with that change you end up with a fender radius profile that does not match the tire radius all too well, I've tried it, because it rotates the fender around the top mount, changing the two radius'centers. My kit matches the fender and tire radius' almost perfectly to the eye.

I designed the kit purposely strong. I have a 190lb passenger who rides on the back with me and have had no clearance issues or strength issues using aircraft grade materials from extra stock we have here at work. The fender ends up about 1.6" to 1.8" lower which gives it about the same look as a relay flip without sacrificing the stock clearances and travel.

Anyway, I have nothing to prove or lose here. Just share it with you all. I'll try and post some other pics showing more of it sometime.
 
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Last Edit: 2017/09/29 15:07 By ctkog.
 

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#1023090
Shores (User)
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
Can you please post photos of the kit and before and after?
 
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#1023095
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
I would be interested in something like that.
 
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#1023100
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
Here are a couple before and aft pics of a friend's bike with the fender mod. This first prototype was made out of 6061-T6 aircraft grade alluminum. Plenty strong enough but I still plan to make the sets with either Titanium or 316 Sstl mainly only because some people may not trust the aluminum although it is plenty strong. The upper offsetting brackets that you see were modeled up in solidworks and stress analyzed by engineering. I want people to be confident they could give big Aunt Bertha a ride down a potholed street and not worry about her busting her ass and ending up on the road. lol So the brackets are damn strong. I plan on using only good grade 8 hardware with it too.

If you look carefully you can see the offset spacers that go between the fender and the frame. On the idea, I tried my best to make this a fairly simple completely bolt on option, with no cutting or prodding required to your stock equipment, so that most anyone could manage it. That way if you ever want to reverse it to sell the bike or whatever, it will be super easy.

I don't know how these pics will turn out clear enough. It was quite a fiasco of hoops just to get these on here.





 
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Last Edit: 2017/10/16 17:47 By ctkog.
 

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#1023104
Shores (User)
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
Thanks for the photos. So three questions.
1. How much wheel travel is lost before tire hits the fender or does or?
2. Doesn't this tilt the passenger seat and sissy bar rearward?
3. Does it create a gap between the fender and the seat?

I would be very interested in one if tire travel is not lost.
 
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Last Edit: 2017/09/29 19:07 By Shores.
 

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#1023109
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
Shores wrote:
Thanks for the photos. So three questions.
1. How much wheel travel is lost before tire hits the fender or does or?
2. Doesn't this tilt the passenger seat and sissy bar rearward?
3. Does it create a gap between the fender and the seat?

I would be very interested in one if tire travel is not lost.


Shores as far as angle, it keeps very close to the same angle position as stock. In other words it's not being repositioned by a "pivot" as the one in the link above Roadiemort provided does. The only thing that happens is the fender is brought down about 1.8" and back about .800". The way the angle stays the same is based on the spacer length I used.

Passenger seat doesn't tilt but I'll try to and get a pic up to show you that. Wife says sissy bar feels the same.

As far as travel I went out and measured the space above the tire is about 4.5". My ahhem "passenger" is 190 lbs and I'm 170 and we haven't had any travel issues yet. If that tells you anything.

It does create some gap between the fender and seat but nothing that noticeable.

hope that helps
 
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Last Edit: 2017/09/29 19:49 By ctkog.
 

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#1023110
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Re:Rear Fender Mod ..... 3 Weeks, 3 Days ago  
I will say the mod may not work with bags with duals that have little space between the bags and the duals. You'll need about 2 inches of space there to be doable.
 
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