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fighter transplant in NC
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14,319 Posts
Discussion Starter · #1 ·
(see what I did there? lol)


I needed an adjustable shock for a project (more on that another day). a friend gave me an 08 R1 shock. they are three way adjustable, and supposedly really good kit for OEM. only problem is that the spring rate was WAAAYY off. according to the charts and guesstimates I needed an 1100 lb/in spring. the R1 shock comes with a 450 lb spring. that won't work. so I looked around for a spring that would be close to the right size with the required spring rate. I came up with two possibilities. a 91-93 vfr750, or an 06-08 ex650 spring. my good friend Knifemaker87 just happened to be using the ex650 shock on his epic Virago build. I asked, and he obliged with some measurements. Once I confirmed that I should be able to make the spring fit, I went ahead and ordered a shock off ebay.

let the work begin.

I first used the most sketchy setup possible to remove the r1 spring. this was actually kinda scary.


no way I want to try this with an 1100 lb spring, but it worked well enough with the 450 lb spring.


I then removed the spring from the EX650 shock. I used the press at work for this. made quick work of it.

once I removed the spring, I slid it onto the R1 shock body. a couple small challenges.
1) the ex shock is smaller at one end than the other. the small end was too big to fit over the preload adjuster.
2) the big end of the spring had a little too much slop to use the collet from the R1 shock
3) unloaded, the EX650 spring was about 0.120" longer than the R1 spring.


challenge 1 was a pretty easy. I chucked the preload adjuster ring in a lathe. took 0.090" off the diameter of the inside boss. it took all of 5 minutes from setup to having a part that fit.



I decided to tackle challenge 2 and 3 together. I would simply make a new collet. working around machines that were and weren't available, I got it done in two lunch breaks. I used 7075 aluminum, and beefed up the whole unit. it should be plenty strong. I have the dimensions if anybody needs them




then I assembled the whole shebang



overall, I think it came out nice. The spring will be going out for powder coating soon. it will be quite a while before I have it on a bike, but its the little steps that are fun at this point.

thanks for taking the time to read this.
 

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Premium Member
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15,798 Posts
by the way i never doubted your work, after getting to know you in person i got the idea that you were extremely hypercritical over your own work and you may of allowed that to get you off track.


keep at it man
 

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fighter transplant in NC
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14,319 Posts
Discussion Starter · #10 ·
would you accept cash to reproduce that?
by the way i never doubted your work, after getting to know you in person i got the idea that you were extremely hypercritical over your own work and you may of allowed that to get you off track.


keep at it man
the title isn't a jab at you. its a jab at my inability to stick with something long enough to finish it. lol. I end up redoing things that were probably good enough, because I think they can be better. oh well. better to laugh at myself and try to improve than to be stuck thinking about my failures.

yes, I could make another one. its a pretty small set of bikes that could benefit from such a swap. the big ones off the top of my head are the Hawk NT650, Versys, and the EX650. the versys especially. those guys are putting r1 shocks on their bikes, and paying decent money for custom springs.
 

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Fast ZX-12R
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17,522 Posts
Real nice job.
 

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fighter transplant in NC
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14,319 Posts
Discussion Starter · #14 ·

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fighter transplant in NC
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14,319 Posts
Discussion Starter · #17 ·
It's Flint, so that means nothing is going on that'd be rideable in the next 5 years. :D
5 years? feeling a bit generous today are we?

hahaha
 

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GURU of da poo poo
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5,717 Posts
I drove through a FLASH DROUGHT and figured if it could be that dry under an overpass then you could get something rolling in 60 months or less.
 

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science bitch
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1,022 Posts
Hey flint, I have been thinking about doing the r1 shock swap on my bike but have been holding off because I'm not sure if putting a linkage shock on a direct link setup would end up being a performance upgrade or not. My thoughts are the shock will be under dampened for such a heavy spring and it will probably not be operating in sweet spot that the engineers designed it to work best in. I would love to hear what someone that knows what they are talking about has to say.
 
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