Fat Bob front end on a Superglide
Road Master
Joined: Feb 2009
Posts: 755
Likes: 222
From: Murrieta Ca.
Deleted due to incorrect content
Best Wishes: Mike
Best Wishes: Mike
BTW, you can not put Brembo calipers on any Dyna 2006 ~ current sliders without having the brake pads hang over the edge of the rotors producing a dangerous situation. A perfect example of someone not having the skills to plan a workable modification. Once something fails you have got problems.
Last edited by Nemosengineer; Mar 8, 2009 at 12:20 AM. Reason: Deleted due to incorrect content
Former Sponsor
Joined: Apr 2007
Posts: 5,360
Likes: 453
From: Davie, FL
Nemosengineer, look at the photo. You can not put Brembo calipers on fatBob lowers without the calipers hanging over the rotor. Read the post very carefully with the list of parts than view the results. You do not want this outcome.
"Well your half right, the V-Rod Brembo calipers are not compatible with the Dyna Rotors, you must use the V-Rod rotors which are a larger diameter."
You need to measure first. Brembo, V-Rod and Dyna 2006 ~ current rotors are all 300 mm. Use your head. When I post I do know what I am talking about.
"Well your half right, the V-Rod Brembo calipers are not compatible with the Dyna Rotors, you must use the V-Rod rotors which are a larger diameter."
You need to measure first. Brembo, V-Rod and Dyna 2006 ~ current rotors are all 300 mm. Use your head. When I post I do know what I am talking about.
Last edited by FastHarley; Mar 7, 2009 at 11:54 PM.
Road Master
Joined: Feb 2009
Posts: 755
Likes: 222
From: Murrieta Ca.
You are absolutely correct, I just measured A Sportster fork leg and the break boss mounting holes are lower on the Sportster fork leg than they are on the Dyna fork leg!!! This makes the Brembo caliper installation incorrect without an oversize rotor. I had done a Dyna caliper swap on my previous Sportster without issue and assumed this dimension the same.
Thank you for correcting me on this point and I will delete the info in my previous post.
Best Wishes: Mike
Thank you for correcting me on this point and I will delete the info in my previous post.
Best Wishes: Mike
Nemosengineer, look at the photo. You can not put Brembo calipers on fatBob lowers without the calipers hanging over the rotor. Read the post very carefully with the list of parts than view the results. You do not want this outcome.
"Well your half right, the V-Rod Brembo calipers are not compatible with the Dyna Rotors, you must use the V-Rod rotors which are a larger diameter."
You need to measure first. Brembo, V-Rod and Dyna 2006 ~ current rotors are all 300 mm. Use your head. When I post I do know what I am talking about.
"Well your half right, the V-Rod Brembo calipers are not compatible with the Dyna Rotors, you must use the V-Rod rotors which are a larger diameter."
You need to measure first. Brembo, V-Rod and Dyna 2006 ~ current rotors are all 300 mm. Use your head. When I post I do know what I am talking about.
Former Sponsor
Joined: Apr 2007
Posts: 5,360
Likes: 453
From: Davie, FL
Thinning the Hurd
re: "Sportster fork leg and the break boss mounting holes are lower on the Sportster fork leg than they are on the Dyna fork leg!!! This makes the Brembo caliper installation incorrect without an oversize rotor. I had done a Dyna caliper swap on my previous Sportster"
>>> You are still missing the point if I am reading/understanding your post correctly. You need the combination 300 mm rotor with a Brembo caliper (only). A Dyna caliper has nothing to do with a Brembo caliper! These are two different parts! Your previous Sportster might have used a TWIN CAM caliper. A Dyna caliper is a TWIN CAM caliper. Different!
It even gets better:
The next abortion to correct is trying to use V-Rod seat pipes in Dyna fork tubes. The guy that made that posting revelation did so with completely removing his hydraulic suspension part and is completely relying on the springs for suspension. Mudd posted the difference in my photo I sent to him in the early days of R & R-ing my dual disk conversion as Jay Risk had posted. Go to that photo showing the two seat pipes side by side and see for yourself why it would not work.
Just a hint, the problem is not in the length but in this photo and this relation with the seat pipe. This is another example why the modification of your Harley should be left to professionals. You are not born with the skill but it must be developed over years of experience. The member of this forum feels "Ya, he did it himself and he did it cheap", however, he made a serious mistake and does not even know how a Harley should ride after this instalation. Take the time and look for it in previous threads if interested. I just shook my head as all of the answers were previously revieled.
The only way you can do this modification (dual disks/brakes) is with making new suspension components to fit in the case of this 06 ~ Current Dyna. I believe that the new Sportster uses the same 49mm fork tubes but I am unsure as to the Sportster's lower sliders as I have never taken them apart to measure and document them.
>>> You are still missing the point if I am reading/understanding your post correctly. You need the combination 300 mm rotor with a Brembo caliper (only). A Dyna caliper has nothing to do with a Brembo caliper! These are two different parts! Your previous Sportster might have used a TWIN CAM caliper. A Dyna caliper is a TWIN CAM caliper. Different!
It even gets better:
The next abortion to correct is trying to use V-Rod seat pipes in Dyna fork tubes. The guy that made that posting revelation did so with completely removing his hydraulic suspension part and is completely relying on the springs for suspension. Mudd posted the difference in my photo I sent to him in the early days of R & R-ing my dual disk conversion as Jay Risk had posted. Go to that photo showing the two seat pipes side by side and see for yourself why it would not work.
Just a hint, the problem is not in the length but in this photo and this relation with the seat pipe. This is another example why the modification of your Harley should be left to professionals. You are not born with the skill but it must be developed over years of experience. The member of this forum feels "Ya, he did it himself and he did it cheap", however, he made a serious mistake and does not even know how a Harley should ride after this instalation. Take the time and look for it in previous threads if interested. I just shook my head as all of the answers were previously revieled.
The only way you can do this modification (dual disks/brakes) is with making new suspension components to fit in the case of this 06 ~ Current Dyna. I believe that the new Sportster uses the same 49mm fork tubes but I am unsure as to the Sportster's lower sliders as I have never taken them apart to measure and document them.
Last edited by FastHarley; Mar 8, 2009 at 10:13 AM.
Elite HDF Member
Joined: Aug 2006
Posts: 3,863
Likes: 21
From: Kennewick, WA
I think the FL front end should be an option on the Dyna's. Sure would make my life easier.
Road Master
Joined: Feb 2009
Posts: 755
Likes: 222
From: Murrieta Ca.
FastHarley, Sorry about the confusion, I understand now (thanks to your explanation) that the Dyna fork leg cannot use the V-Rod Brembo caliper as its pads do not fully engage the swept area of the rotor and that the Dyna rotor and the V-Rod rotor are the same diameter (I was incorrect, thinking that the late Dyna rotor was the same diameter as the Sportster rotor). making the swap to the V-Rod Brembo caliper on the Dyna fork leg a bad idea and not advised.
The Dyna caliper swap on my 2007 Sportster was a bolt on and was desirable as it was a swap from 2 piston to 4 piston calipers. Other Sportster owners have made the swap to the V-Rod Calipers and Rotors which is possible on Sportster's as the V-Rod rotor is larger in diameter than the Sportster rotor and the break pads are fully engaged by the rotor.
I was incorrect in my assumptions about the ability to swap V-Rod calipers on a Dyna fork leg, and thank you for taking the time to fully explain this to me, as it has saved me disappointment, extra work, and a few hundred dollars.
I was planing to order parts on Tuesday, but I see that I have to fully revise my plans for this modification. I still plan on using Fat-Bob fork legs complete (P/N 48623-08 & 48622-08 fork legs & tubes complete assy) as a basis for the conversion with Dyna calipers, If you see any holes in my current logic please let me know.
P.S. Am I missing something about compatibility issues using the Fat-Bob forks for this conversion??? I have reviewed all the threads on this topic via the forum search function and I must admit, I am more confused than ever, as the amount of conflicting information about what fits what and what works is truly staggering (we may be doing business in the near future if the Fat-Bob forks wont work).
Thanks For Your Time: Mike
The Dyna caliper swap on my 2007 Sportster was a bolt on and was desirable as it was a swap from 2 piston to 4 piston calipers. Other Sportster owners have made the swap to the V-Rod Calipers and Rotors which is possible on Sportster's as the V-Rod rotor is larger in diameter than the Sportster rotor and the break pads are fully engaged by the rotor.
I was incorrect in my assumptions about the ability to swap V-Rod calipers on a Dyna fork leg, and thank you for taking the time to fully explain this to me, as it has saved me disappointment, extra work, and a few hundred dollars.
I was planing to order parts on Tuesday, but I see that I have to fully revise my plans for this modification. I still plan on using Fat-Bob fork legs complete (P/N 48623-08 & 48622-08 fork legs & tubes complete assy) as a basis for the conversion with Dyna calipers, If you see any holes in my current logic please let me know.
P.S. Am I missing something about compatibility issues using the Fat-Bob forks for this conversion??? I have reviewed all the threads on this topic via the forum search function and I must admit, I am more confused than ever, as the amount of conflicting information about what fits what and what works is truly staggering (we may be doing business in the near future if the Fat-Bob forks wont work).
Thanks For Your Time: Mike
re: "Sportster fork leg and the break boss mounting holes are lower on the Sportster fork leg than they are on the Dyna fork leg!!! This makes the Brembo caliper installation incorrect without an oversize rotor. I had done a Dyna caliper swap on my previous Sportster"
>>> You are still missing the point if I am reading/understanding your post correctly. You need the combination 300 mm rotor with a Brembo caliper (only). A Dyna caliper has nothing to do with a Brembo caliper! These are two different parts! Your previous Sportster might have used a TWIN CAM caliper. A Dyna caliper is a TWIN CAM caliper. Different!
It even gets better:
The next abortion to correct is trying to use V-Rod seat pipes in Dyna fork tubes. The guy that made that posting revelation did so with completely removing his hydraulic suspension part and is completely relying on the springs for suspension. Mudd posted the difference in my photo I sent to him in the early days of R & R-ing my dual disk conversion as Jay Risk had posted. Go to that photo showing the two seat pipes side by side and see for yourself why it would not work.
Just a hint, the problem is not in the length but in this photo and this relation with the seat pipe. This is another example why the modification of your Harley should be left to professionals. You are not born with the skill but it must be developed over years of experience. The member of this forum feels "Ya, he did it himself and he did it cheap", however, he made a serious mistake and does not even know how a Harley should ride after this instalation. Take the time and look for it in previous threads if interested. I just shook my head as all of the answers were previously revieled.
The only way you can do this modification (dual disks/brakes) is with making new suspension components to fit in the case of this 06 ~ Current Dyna. I believe that the new Sportster uses the same 49mm fork tubes but I am unsure as to the Sportster's lower sliders as I have never taken them apart to measure and document them.
>>> You are still missing the point if I am reading/understanding your post correctly. You need the combination 300 mm rotor with a Brembo caliper (only). A Dyna caliper has nothing to do with a Brembo caliper! These are two different parts! Your previous Sportster might have used a TWIN CAM caliper. A Dyna caliper is a TWIN CAM caliper. Different!
It even gets better:
The next abortion to correct is trying to use V-Rod seat pipes in Dyna fork tubes. The guy that made that posting revelation did so with completely removing his hydraulic suspension part and is completely relying on the springs for suspension. Mudd posted the difference in my photo I sent to him in the early days of R & R-ing my dual disk conversion as Jay Risk had posted. Go to that photo showing the two seat pipes side by side and see for yourself why it would not work.
Just a hint, the problem is not in the length but in this photo and this relation with the seat pipe. This is another example why the modification of your Harley should be left to professionals. You are not born with the skill but it must be developed over years of experience. The member of this forum feels "Ya, he did it himself and he did it cheap", however, he made a serious mistake and does not even know how a Harley should ride after this instalation. Take the time and look for it in previous threads if interested. I just shook my head as all of the answers were previously revieled.
The only way you can do this modification (dual disks/brakes) is with making new suspension components to fit in the case of this 06 ~ Current Dyna. I believe that the new Sportster uses the same 49mm fork tubes but I am unsure as to the Sportster's lower sliders as I have never taken them apart to measure and document them.
Last edited by Nemosengineer; Mar 8, 2009 at 06:19 PM. Reason: Add Stuff
Former Sponsor
Joined: Apr 2007
Posts: 5,360
Likes: 453
From: Davie, FL
options
Mike, why not just revise your whole project and scrap the Fat Bob lowers idea? Use V-Rod LOWERS (only parts you use) than start from there. You can use 11 1/2" rotors with TWIN CAM calipers (or the other side with an additional right side caliper off of a dresser 2000 ~ 2007) ~~~~or~~~~~ Brembos with 300 mm rotors. As stated before do not go by that other post where the guy made the long extensions. Look above as that method and approach does not work.
NOTE* You will need to purchase a new set of Fat Bob triple trees to make this work (assuming you are using a stock 19" SB type front wheel):
>>> "I still plan on using Fat-Bob fork legs complete (P/N 48623-08 & 48622-08 fork legs & tubes complete assy)"
<<< You are still going to have to mill the caliper mount on the lower leg(s) to move it so it aligns up with the brake rotor. You will need to use and purchase 300 mm rotors and you will NEVER be able to use Brembo calipers if you ever wish to convert over.
NOTE* You do not need to purchase a new set of Fat Bob triple trees to make this work if you have the stock SB type medium glide triple trees found on a 2006~current Sportster or Dyna:
For near the same money as you would have spent (P/N 48623-08 & 48622-08 fork legs & tubes complete assy $335.49/each at Latus HD + freight) you could have a: set of brand new Race Tech emulators and linear wound springs for your weight inside of a set of brand new forks, fully assembled and ready to go. This method also allows you to just bolt up your fender without modification.
The aforementioned method build is only for SB/SG type medium glide triple trees found on a 2006~current Sportsters or Dyna:
NOTE* You will need to purchase a new set of Fat Bob triple trees to make this work (assuming you are using a stock 19" SB type front wheel):
>>> "I still plan on using Fat-Bob fork legs complete (P/N 48623-08 & 48622-08 fork legs & tubes complete assy)"
<<< You are still going to have to mill the caliper mount on the lower leg(s) to move it so it aligns up with the brake rotor. You will need to use and purchase 300 mm rotors and you will NEVER be able to use Brembo calipers if you ever wish to convert over.
NOTE* You do not need to purchase a new set of Fat Bob triple trees to make this work if you have the stock SB type medium glide triple trees found on a 2006~current Sportster or Dyna:
For near the same money as you would have spent (P/N 48623-08 & 48622-08 fork legs & tubes complete assy $335.49/each at Latus HD + freight) you could have a: set of brand new Race Tech emulators and linear wound springs for your weight inside of a set of brand new forks, fully assembled and ready to go. This method also allows you to just bolt up your fender without modification.
The aforementioned method build is only for SB/SG type medium glide triple trees found on a 2006~current Sportsters or Dyna:
Last edited by FastHarley; Mar 8, 2009 at 08:11 PM.
Road Warrior
Joined: Dec 2006
Posts: 1,492
Likes: 1
From: MA
for years HD marketing has understood that they need the low end big twin to come in at under $12K MSRP.
while I do agree that with the current price structure, the FXDC is by far the best deal in the dyna lineup - it's still $13K.
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