ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-26-2013, 10:38 PM   #1
Gangplank OP
Advenchaintourer
 
Gangplank's Avatar
 
Joined: Jul 2003
Location: Las Vegas
Oddometer: 2,294
F650GS (single) Swing arm swap ideas

So reading through the F650GS fork swap thread... and after trading my F800GS for a F650GS and a bundle of cash I got to thinking...

What is the chance that there is a swing arm out there that could replace the F650GS steel (read heavy Mo-Fo) swing arm with an aluminium swing arm off a dirt bile and then using either the Dakar shock or some other bike's shock as a replacement

Ideas, thoughts, concepts....

And don't tell me I'll shoot my eye out. It either can or can't be done.
__________________
Ride more, bark less
Gangplank is offline   Reply With Quote
Old 02-26-2013, 10:51 PM   #2
Gangplank OP
Advenchaintourer
 
Gangplank's Avatar
 
Joined: Jul 2003
Location: Las Vegas
Oddometer: 2,294
I'm planning to take the F650GS down to a buddy's shop and take some measurements. From there we'll figure out what older swing arm might fit and do some weighing.

Thoughts on why and what - the stock F650GS is a fat biotch. You can lose some weight by taking off or swapping out some things.

Front End Swap = ~15 lbs
ABS Pump = 4-8 lbs
Swap Exhaust = 6-8 lbs

That is 25+ lbs right there. How much do ya think could be gained by this?
__________________
Ride more, bark less
Gangplank is offline   Reply With Quote
Old 02-27-2013, 12:47 AM   #3
Aquatic
Beastly Adventurer
 
Aquatic's Avatar
 
Joined: Dec 2008
Location: Buddina, Sunny Coast, Australia
Oddometer: 1,402
Here is the swing arm

https://www.dropbox.com/s/bt4rv9rt1o...WING%20ARM.PDF

If anyone wants any more details, let me know.
Aquatic is offline   Reply With Quote
Old 02-27-2013, 06:53 AM   #4
Gangplank OP
Advenchaintourer
 
Gangplank's Avatar
 
Joined: Jul 2003
Location: Las Vegas
Oddometer: 2,294
Well now that's cool!!



Why do you have a CAD of the swingarm?

Next step is to compare those measurements to various replacement options & especially ones that are readily available?

And then its what shock would fit & have an 18" wheel built if needed.
__________________
Ride more, bark less

Gangplank screwed with this post 02-27-2013 at 08:57 AM
Gangplank is offline   Reply With Quote
Old 02-27-2013, 07:14 AM   #5
TobyG
be happy :)
 
TobyG's Avatar
 
Joined: Dec 2011
Location: in the garage
Oddometer: 499
You could always try and find one of the infamous Touratech aluminium swingarms. You know, the ones they offered to refund your money on if you sent them back, after they broke a couple in the Dakar 2002. They didn't sell many of those, in the first place.
I am only aware of 5 of those still out there, so assume that there's a dozen or two of them still in existance.

Not that you'll find one...

These are extremely light, however. And they look way cool.

Other than that, you could contact a company building custom swingarms (Krueger and Junginger in example).
__________________
"a scoot (that wouldn't go more than 28mph if you dropped it out of an airplane)" ~duck
"If loud pipes saved lives, then ambulances would run straight pipes instead of lights and sirens." ~Phlemdog
This is why I always wear gloves. How you gonna wipe your butt with hands covered in bandages? ~MrBob
TobyG is offline   Reply With Quote
Old 02-27-2013, 07:19 AM   #6
Aquatic
Beastly Adventurer
 
Aquatic's Avatar
 
Joined: Dec 2008
Location: Buddina, Sunny Coast, Australia
Oddometer: 1,402
Quote:
Originally Posted by Gangplank View Post
Well now that's cool!! Why do you have a CAD of the swingarm?

Next step is to compare those measurements to various replacement options & especially ones that are readily available?

And then its what shock would fit & have an 18" wheel built if needed.
For this very reason. Done a bit of research. You can cut the weight by roughly 30% if you build the exact same swing arm out of chromoly. The added strength means you can use a thinner section. But forming it is lot harder.
Aquatic is offline   Reply With Quote
Old 02-27-2013, 08:50 AM   #7
Gangplank OP
Advenchaintourer
 
Gangplank's Avatar
 
Joined: Jul 2003
Location: Las Vegas
Oddometer: 2,294
Quote:
Originally Posted by Aquatic View Post
For this very reason. Done a bit of research. You can cut the weight by roughly 30% if you build the exact same swing arm out of chromoly. The added strength means you can use a thinner section. But forming it is lot harder.
I'm hoping to rind a replacement that I can use.

The shock is going to be tricky but stranger things have fit other bikes in this world. Sportbikes do all sorts of swaps that work for race bikes, etc.


From the Forks Conversion Thread:
Quote:
Originally Posted by LoJack View Post
It's about 13 pounds. What does your average 600cc Alu swing arm weigh?

I looked for a while for a replacement and think that an ATK swingarm might fit, but don't know for sure. I wasn't able to find one for a while and then sort of left it. Most are too narrow for the Dakar's Rotax. I'd still be interested in replacing it if I knew what to look for. Maybe you just need to find a motorcycle salvage yard and bring some measuring tools.
Hmmm... Seems the stock swing arm should weight more than 13 lbs no?
__________________
Ride more, bark less

Gangplank screwed with this post 02-27-2013 at 08:58 AM
Gangplank is offline   Reply With Quote
Old 02-27-2013, 01:55 PM   #8
LoJack
Beastly Adventurer
 
LoJack's Avatar
 
Joined: Apr 2008
Location: B.G., yo!
Oddometer: 1,383
Quote:
Originally Posted by Gangplank View Post
Hmmm... Seems the stock swing arm should weight more than 13 lbs no?

I'm almost positive that's what it is. I remember thinking if I could find/build something that weighed 8 lbs I'd save 5 lbs. After a while, I decided it would be easier and cheaper to find something....

I could be wrong on though because it was over about a year ago, but it's certainly no more than 15 lbs.
LoJack is offline   Reply With Quote
Old 02-27-2013, 04:09 PM   #9
Gangplank OP
Advenchaintourer
 
Gangplank's Avatar
 
Joined: Jul 2003
Location: Las Vegas
Oddometer: 2,294
Don't supposed anyone knows where to get the measurements for other swingarms?

Looking at some from ATK?
G650X Challenge?
Any other suggestions
__________________
Ride more, bark less
Gangplank is offline   Reply With Quote
Old 02-28-2013, 09:19 AM   #10
LoJack
Beastly Adventurer
 
LoJack's Avatar
 
Joined: Apr 2008
Location: B.G., yo!
Oddometer: 1,383
I was contacting people that had stuff on ebay. Some never responded, but others were happy to send measurements.

G650XChallenge swing arms have an asymmetrical pivot. The left side is outside the frame. Maybe it'll work, but I don't know.
LoJack is offline   Reply With Quote
Old 02-28-2013, 03:47 PM   #11
Gangplank OP
Advenchaintourer
 
Gangplank's Avatar
 
Joined: Jul 2003
Location: Las Vegas
Oddometer: 2,294
I asked someone on Fleabay and the stock unit weighs 15.85 lbs so about 16. Wonder what a regular dirtbike swingarm weights?
__________________
Ride more, bark less
Gangplank is offline   Reply With Quote
Old 02-28-2013, 04:37 PM   #12
TobyG
be happy :)
 
TobyG's Avatar
 
Joined: Dec 2011
Location: in the garage
Oddometer: 499
No idea, however, the Touratech Aluminium one weighs 8.8 pounds. The front part is cast aluminium, the rear part is aluminium profiles.
The reason they made this swingarm in the first place is, aside from saving weight, having full chain adjustability using an 18" rear and gaining 30 additional mm of rear travel (280 mm, you could only get 250 with the stock swingarm).







__________________
"a scoot (that wouldn't go more than 28mph if you dropped it out of an airplane)" ~duck
"If loud pipes saved lives, then ambulances would run straight pipes instead of lights and sirens." ~Phlemdog
This is why I always wear gloves. How you gonna wipe your butt with hands covered in bandages? ~MrBob
TobyG is offline   Reply With Quote
Old 02-28-2013, 05:51 PM   #13
Aquatic
Beastly Adventurer
 
Aquatic's Avatar
 
Joined: Dec 2008
Location: Buddina, Sunny Coast, Australia
Oddometer: 1,402
Quote:
Originally Posted by TobyG View Post
No idea, however, the Touratech Aluminium one weighs 8.8 pounds. The front part is cast aluminium, the rear part is aluminium profiles.
The reason they made this swingarm in the first place is, aside from saving weight, having full chain adjustability using an 18" rear and gaining 30 additional mm of rear travel (280 mm, you could only get 250 with the stock swingarm).







Do you have that as a 3D model or only pictures?
Aquatic is offline   Reply With Quote
Old 02-28-2013, 06:08 PM   #14
LoJack
Beastly Adventurer
 
LoJack's Avatar
 
Joined: Apr 2008
Location: B.G., yo!
Oddometer: 1,383
Quote:
Originally Posted by Gangplank View Post
I asked someone on Fleabay and the stock unit weighs 15.85 lbs so about 16. Wonder what a regular dirtbike swingarm weights?

Gotcha,
LoJack is offline   Reply With Quote
Old 02-28-2013, 10:58 PM   #15
TobyG
be happy :)
 
TobyG's Avatar
 
Joined: Dec 2011
Location: in the garage
Oddometer: 499
Quote:
Originally Posted by Aquatic View Post
Do you have that as a 3D model or only pictures?
I only got those 3 rendered files and real-life pictures.
If you want to see anything in particular, I can check if I got a pic or I can take one the next time I get a chance.
__________________
"a scoot (that wouldn't go more than 28mph if you dropped it out of an airplane)" ~duck
"If loud pipes saved lives, then ambulances would run straight pipes instead of lights and sirens." ~Phlemdog
This is why I always wear gloves. How you gonna wipe your butt with hands covered in bandages? ~MrBob
TobyG is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not 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 On

Forum Jump


Times are GMT -7.   It's 10:12 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014