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Offline patzx12

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Dog bones.
« on: August 01, 2020, 05:44:37 PM »
I am a bit tippy toes on my new to me 2019.
I think i will drop it 25mm.
Question is does anyone know how much lengthening the suspension links equates to 25mm at the wheel?
I have a machine shop and have made plenty of "dog bones". I usually make some in 2mm alloy plate and try them on the bike until i hit the correct height.
Thanks.

Offline smithy

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Re: Dog bones.
« Reply #1 on: August 01, 2020, 10:01:39 PM »
Just get yourself a set of Soupy's lowering links...job done.

Smithy.
When I die, I want to go peacefully in my sleep like my Grandfather....not screaming like the passengers in his car..!

Offline patzx12

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Re: Dog bones.
« Reply #2 on: August 02, 2020, 01:58:22 PM »
I had a look and i dont like them. They rely on rod ends and eliminate the needle roller bearings.
I am an engineer and can do better than what i have seen for sale.
I have started testing heights with 2 pieces of steel strip.
One i have established the ideal link length for my reduction i will go ahead and CNC the new links.

Offline smithy

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Re: Dog bones.
« Reply #3 on: August 02, 2020, 08:58:44 PM »
*Originally Posted by patzx12 [+]
I had a look and i dont like them. They rely on rod ends and eliminate the needle roller bearings.
I am an engineer and can do better than what i have seen for sale.
I have started testing heights with 2 pieces of steel strip.
One i have established the ideal link length for my reduction i will go ahead and CNC the new links.

Fair enough...go your hardest..I don't think there is an "ideal" link length as you'll not find two identical spring lengths or spring rates....even though they may have the same part number.

Many of us have the Soupy's links or similar...and they make them for many different bike makes etc... I've had mine on for over 3 years with no issues at all. Set 'n forget, I just give the joints a bit of a lube during my regular service, job done.

Smithy.
When I die, I want to go peacefully in my sleep like my Grandfather....not screaming like the passengers in his car..!

Offline patzx12

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Re: Dog bones.
« Reply #4 on: August 11, 2020, 01:00:02 AM »
My Link is made and fitted. I went +9.3mm longer.
I have dropped the front 18mm
The height is spot on for me now.
I used needle rollers and seals.


Offline smithy

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Re: Dog bones.
« Reply #5 on: August 11, 2020, 03:29:51 AM »
Nice work Sir... :028:

What grade aluminium did you use..??

Smithy.
When I die, I want to go peacefully in my sleep like my Grandfather....not screaming like the passengers in his car..!

Offline patzx12

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Re: Dog bones.
« Reply #6 on: August 13, 2020, 05:21:23 PM »
Dont remember had it in stock for years, but i only bought top quality.

Offline Jimmybon

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Re: Dog bones.
« Reply #7 on: August 14, 2020, 12:15:29 PM »
Hi Pat, nice bit of machining, 9.3mm is a pretty precise measure. Can I ask what seat height you achieved or how far you lowered it? Cheers Jimmy

Offline patzx12

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Re: Dog bones.
« Reply #8 on: August 14, 2020, 02:07:43 PM »
Hi Jimmy, I tested with 2 strips of steel first and went with a length that felt right.
Suspension on its softest setting and me on the balls of my feet solo. I can almost flat foot with my co-pilot on board.
Taking a measurement using the rear spindle i would say its down 20 to 25mm
Forks are down exactly 20mm.
The bike feels spot on. Side stand lean is better, main stand is a bit of a yank but nothing compared to my CBX1000.
I can jack it up again with the ESA. I am sure there are calculations that can be done to see how the rising rate is changed but i dont think it matters, 
Take away the ESA and the XR is just a basic rising rate suspension no more sophisticated than practically every motorcycle manufactured since the 1990's.

Offline Jimmybon

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Re: Dog bones.
« Reply #9 on: August 16, 2020, 11:57:42 PM »
Thanks Pat, I've purchaced soupye's so now have an idea of what to do. It looks a tight squeeze to get in there to replace. Did you remove your exhaust to do the swap?

 


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