Extended swingarm. - Harley Davidson Forums: Harley Davidson Motorcycle Forum
 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 03-09-2012, 11:51 AM Thread Starter
Senior Member
 
Jon_Fatboy_P's Avatar
 
Join Date: Feb 2011
Location: Mechanicsville Maryland
Posts: 669
Images: 43
Extended swingarm.

Time to personalize my ride. I'm soon to embark on a project on my 1998 Fatboy. One of a few mods I'm planning for her. This one will be the most involved mod. At least for now. My plan is to install a custom swingarm to extend the wheel base by 8". No fat tire. Just kicking the stock wheel back a bit. In addition to the extended swingarm itself. At minimum it will require modding the rear fender, relocating the back brake lights, tag bracket, and turn signals, a Belt to Chain Conversion, a custom back brake line, and switching to a Dyna style rear brake system. To that end I'm writing to find out if a stock softail rear caliper will fit on to a stock Dyna rear caliper mount of the same year.

I'm still planning this thing out to be sure I have the $$$ and proper parts and tools to do this right. Any advice as always is appreciated.

Jonathan

Jon_Fatboy_P

That stone just keeps on rolling. Bringing me some real bad news. The takers get the honey. The givers sing the blues.

ROBIN TROWER
Jon_Fatboy_P is online now  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 03-10-2012, 11:10 AM Thread Starter
Senior Member
 
Jon_Fatboy_P's Avatar
 
Join Date: Feb 2011
Location: Mechanicsville Maryland
Posts: 669
Images: 43
Quote:
Originally Posted by Jon_Fatboy_P View Post
Time to personalize my ride. I'm soon to embark on a project on my 1998 Fatboy. One of a few mods I'm planning for her. This one will be the most involved mod. At least for now. My plan is to install a custom swingarm to extend the wheel base by 8". No fat tire. Just kicking the stock wheel back a bit. In addition to the extended swingarm itself. At minimum it will require modding the rear fender, relocating the back brake lights, tag bracket, and turn signals, a Belt to Chain Conversion, a custom back brake line, and switching to a Dyna style rear brake system. To that end I'm writing to find out if a stock softail rear caliper will fit on to a stock Dyna rear caliper mount of the same year.
I'm still planning this thing out to be sure I have the $$$ and proper parts and tools to do this right. Any advice as always is appreciated.

Jonathan
Never Mind. Thanks to a link Dave63 used to help a fellow member I was able to find the answer to my question. The link was to New Rock Harley Davidson. The answer to my question is yes. The part number for the rear caliper for my Fatboy and the equivelent year Dyna are the same. Thank you Dave.

Looking back on my post I guess it was filled with alot of TMI, or at least thats what I'm calling it. My bad. From now on just the basic question unless somone willing to help asks for more info. I'll leave the details of projects to those who members like to read. Such as Rockerbox1. BTW I hope your new bike build is going well. Warm weather is so close.

Jonathan

Jon_Fatboy_P

That stone just keeps on rolling. Bringing me some real bad news. The takers get the honey. The givers sing the blues.

ROBIN TROWER
Jon_Fatboy_P is online now  
post #3 of 9 (permalink) Old 03-11-2012, 07:23 AM
Retired citizen
 
SCHMIDTYS's Avatar
 
Join Date: Jun 2009
Location: Pt. Wash.,WI
Posts: 14,686
Okay Jon Fatboy P , the first problem I see with the 8" swingarm extend is the shocks . The added leverage from the extension is going to overstress the shocks allowing the rear suspension to bottom very easy .
Before cutting and welding the swingarm I would investigate finding suitable shock replacements or if there are stiffer springs available for the shock inners . If not then the only other option I can think of off hand would be to replace the shocks with struts making it a hard riding rigid suspension .

Disclaimer : Don't believe anything I say unless you are absolutely sure that I know what I'm talking about .
SCHMIDTYS is online now  
post #4 of 9 (permalink) Old 03-11-2012, 09:26 PM
Addicted Since 2010
 
XL1200R's Avatar
 
Join Date: Jul 2011
Location: Upstate NY
Posts: 7,745
Images: 38
Garage
Quote:
Originally Posted by SCHMIDTYS View Post
Okay Jon Fatboy P , the first problem I see with the 8" swingarm extend is the shocks . The added leverage from the extension is going to overstress the shocks allowing the rear suspension to bottom very easy .
Before cutting and welding the swingarm I would investigate finding suitable shock replacements or if there are stiffer springs available for the shock inners . If not then the only other option I can think of off hand would be to replace the shocks with struts making it a hard riding rigid suspension .
Yea, but then you are putting tons of stress on the shock mounts that aren't meant to take the whole effects of bumps in the first place.

Im no expert but Id think you'd eventually crack the mounts.

Link to my Youtube channel. All riding videos. Enjoy.
http://www.youtube.com/user/PittSteelers1345

"Mr. Lahey is this you talking or the liquor?"

"Randy...(takes a swig)...I am the Liquor!!!"
XL1200R is online now  
post #5 of 9 (permalink) Old 03-20-2012, 10:43 PM Thread Starter
Senior Member
 
Jon_Fatboy_P's Avatar
 
Join Date: Feb 2011
Location: Mechanicsville Maryland
Posts: 669
Images: 43
Thanks for your input SCHMIDTYS and XR1200R. I'm definitely not going rigid. If I were I'de weld a rigid rear frame section in as some customs do. Stiffer springs are an option. If the available options aren't stiff enough there are companys that will custom wind spring to your specs. I'm willing to weld in supports for the shock mounts on both the frame and the swingarm as necessary. I'll also get a second hand doner swing arm as a test subject so as to not leave myself high and dry if the project goes bust. For me. These are the things that make a custom project fun. As they say. It's not the kill. It's the thrill of the chase.

Jonathan

Jon_Fatboy_P

That stone just keeps on rolling. Bringing me some real bad news. The takers get the honey. The givers sing the blues.

ROBIN TROWER
Jon_Fatboy_P is online now  
post #6 of 9 (permalink) Old 03-21-2012, 06:19 AM
Addicted Since 2010
 
XL1200R's Avatar
 
Join Date: Jul 2011
Location: Upstate NY
Posts: 7,745
Images: 38
Garage
Quote:
Originally Posted by Jon_Fatboy_P View Post
Thanks for your input SCHMIDTYS and XR1200R. I'm definitely not going rigid. If I were I'de weld a rigid rear frame section in as some customs do. Stiffer springs are an option. If the available options aren't stiff enough there are companys that will custom wind spring to your specs. I'm willing to weld in supports for the shock mounts on both the frame and the swingarm as necessary. I'll also get a second hand doner swing arm as a test subject so as to not leave myself high and dry if the project goes bust. For me. These are the things that make a custom project fun. As they say. It's not the kill. It's the thrill of the chase.

Jonathan
Id go custom suspension right away

I can't imagine anything will work theft way you want it to when that swing arm has that much more leverage.

Link to my Youtube channel. All riding videos. Enjoy.
http://www.youtube.com/user/PittSteelers1345

"Mr. Lahey is this you talking or the liquor?"

"Randy...(takes a swig)...I am the Liquor!!!"
XL1200R is online now  
post #7 of 9 (permalink) Old 03-21-2012, 02:05 PM
ROOAADDD KINGGGGG
 
Rohan's Avatar
 
Join Date: Jun 2011
Location: Arizona
Posts: 2,018
Garage
Since you're extending out 8", why don't you just fab some mounts and put a big coil over shock or two in between the tire and the oil tank/battery box? That would take the extra stress away from the stock shocks and it should look pretty good.


-Rohan
Rohan is offline  
post #8 of 9 (permalink) Old 03-21-2012, 02:11 PM
ROOAADDD KINGGGGG
 
Rohan's Avatar
 
Join Date: Jun 2011
Location: Arizona
Posts: 2,018
Garage
Something like this...
Attached Images
File Type: jpg KIF_2098.JPG (83.5 KB, 20 views)
Rohan is offline  
post #9 of 9 (permalink) Old 03-23-2012, 12:16 AM Thread Starter
Senior Member
 
Jon_Fatboy_P's Avatar
 
Join Date: Feb 2011
Location: Mechanicsville Maryland
Posts: 669
Images: 43
Quote:
Originally Posted by Rohan View Post
Something like this...
Thats a nice setup. It could be done to mine. I'll consider that if replacing the stock springs with stiffer springs don't work.

Jon_Fatboy_P

That stone just keeps on rolling. Bringing me some real bad news. The takers get the honey. The givers sing the blues.

ROBIN TROWER
Jon_Fatboy_P is online now  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Harley Davidson Forums: Harley Davidson Motorcycle Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome