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Discussion Starter #1
I've told my darling wife that the $57 OEM '13+ used shock I bought as a band aid is nearing it's end of useful life and that I wanted to replace with a new aftermarket shock.

We're budgeting ~$400. If you are able to point me at what my options are at that price point, and give a recommendation as to why you'd go a particular way it would be appreciated.

I have my OEM '09 shock, as well as that somewhat tired '13+ unit. I'm sure they aren't worth much as is.

If the '09 unit could be rebuilt for less than the cost of a new aftermarket unit, I would consider that. 45 minutes of online searching has resulted in me sending inquiries to the outfits listed below. Curious to see where this lands.

https://traxxion.com/product/oem-shock-revalve-and-respring/

https://www.racetech.com/ProductSearch/12/Kawasaki/ZX-6R (ZX600) Ninja/2009

Pro-Action Suspension | Motocross Suspension | Harley Shocks
 

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I’d look for a used Penske or JRI if I were you. Those could be had around that price point if you luck out.

There was a guy on here selling a JRI for $450 not too long ago if you search the classifieds maybe he still has it.


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Discussion Starter #3
because the '09 OEM unit has low and high speed compression damping, I'm hoping it's worth the effort of refreshing. If I buy a used high performance racing shock, it's going to need to be re-sprung, possibly re-valved; certainly refreshed..... That $400 shock is really a $600+ shock -- still, much less than a brand new Ohlins, etc. @ $1,200+
 

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You are 100% correct most used shocks will need a refresh. That said I don’t know enough about re-valving the stock stuff to say whether or not that would be worth doing but it certainly will be better than not doing anything.


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I've told my darling wife that the $57 OEM '13+ used shock I bought as a band aid is nearing it's end of useful life and that I wanted to replace with a new aftermarket shock.

We're budgeting ~$400. If you are able to point me at what my options are at that price point, and give a recommendation as to why you'd go a particular way it would be appreciated.

I have my OEM '09 shock, as well as that somewhat tired '13+ unit. I'm sure they aren't worth much as is.

If the '09 unit could be rebuilt for less than the cost of a new aftermarket unit, I would consider that. 45 minutes of online searching has resulted in me sending inquiries to the outfits listed below. Curious to see where this lands.

https://traxxion.com/product/oem-shock-revalve-and-respring/

https://www.racetech.com/ProductSearch/12/Kawasaki/ZX-6R (ZX600) Ninja/2009

Pro-Action Suspension | Motocross Suspension | Harley Shocks
I'll have my penske triple piggyback for sale next week after my last TD of this year. PM me if you're interested.
 

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Discussion Starter #6
The '09 shock had 12K on it when I bought the bike. The owner before me was a hefty guy, with a gf to match. I'm sure the pair was over 400 lbs, and they had the suspension near the maximum settings as a result when I got it. So stiff my teeth clattered together, my vision was blurry at any speed. By the time I got another 10K on the bike, I had backed everything off enough to call it good enough, through the next 20K before both ends started to wallow and become more and more vague.

I hadn't ever noticed any significant changes, as a result of damper adjustments. When I rebuilt the fork at ~53K, it showed me that there was no damping control (remaining) on the rear shock. Lloyd suggested a newer used OEM shock could be an improvement, and that was definitely better than what was going on with the '09, by that point. The adjustments actually had an impact on shock behavior.

It's now at the max compression and rebound, and I can tell it's starting to lose ground.

If I can rebuild that '09, I would hope to get a couple of years of decent street performance out of it. 20-30K would be highly desirable. That would put the entire bike at near 90K, and is likely to be at the point where I would have replaced it with something else.
 

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We're budgeting ~$400. If you are able to point me at what my options are at that price point, and give a recommendation as to why you'd go a particular way it would be appreciated.
I'm not sure this matters to your budget or not, but you should keep in mind that you can always sell any aftermarket shock for most of what you paid for it in a few years if necessary, getting much of the money back out of it.


I’d look for a used Penske or JRI if I were you.
+1. A used name brand is a great way to go for a bike that is a few years old where the racers have moved on and there are spares sitting in garages across the land. I lucked into an excellent condition cheap Ohlins for my 98 from a fellow member of an email list to replace the sacked OEM unit and it was a great upgrade.


I've heard great things about the JRi shocks: www.jrishocks.com
Thanks for that, I hadn't heard of JRI before. I'm not seeing sport bike shocks on their site?


Mark
 

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I was watching a Dave Moss suspension setup video, where the customer had a dying rear shock on some sort of 600 cc super sport. Dave’s advice was to pickup a used OEM unit, have it refreshed, and then swap it for the current one. Dave stated you get about 7-8k out of an oem, and to keep the old one, and just keep refreshing/swapping them out.

I don’t know how often a good aftermarket unit needs to be refreshed, but if it’s similar, it might be cheaper to go the oem route, unless your trying to shave seconds of a lap time.

Pretty sure I should look into this, as my rear hasn’t been touched in it’s nearly 75k mike life...
 

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Discussion Starter #13
I was watching a Dave Moss suspension setup video, where the customer had a dying rear shock on some sort of 600 cc super sport. Dave’s advice was to pickup a used OEM unit, have it refreshed, and then swap it for the current one. Dave stated you get about 7-8k out of an oem, and to keep the old one, and just keep refreshing/swapping them out.

I don’t know how often a good aftermarket unit needs to be refreshed, but if it’s similar, it might be cheaper to go the oem route, unless your trying to shave seconds of a lap time.

Pretty sure I should look into this, as my rear hasn’t been touched in it’s nearly 75k mike life...
That's an option, if you can find someone to refresh the OEM unit..... I've got emails out to everyone I listed hyperlinks to, and have only gotten one response, to say that the company is shut down.

On Lloyd's advice, I went the route of buying a $57 used OEM shock from '13+, and it's a marked improvement over the sacked out '09 shock. If I could send the '09 out to be refreshed, I would certainly go that route as I won't be 'down' while that work happens.

I'm even considering what it would take to gather the tools to learn how to do it myself. Hardest part seems to be recharging the shock with high pressure nitrogen ( I could do that at work ).
 

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That's an option, if you can find someone to refresh the OEM unit..... I've got emails out to everyone I listed hyperlinks to, and have only gotten one response, to say that the company is shut down.

On Lloyd's advice, I went the route of buying a $57 used OEM shock from '13+, and it's a marked improvement over the sacked out '09 shock. If I could send the '09 out to be refreshed, I would certainly go that route as I won't be 'down' while that work happens.

I'm even considering what it would take to gather the tools to learn how to do it myself. Hardest part seems to be recharging the shock with high pressure nitrogen ( I could do that at work ).
The one place I looked, a refresh was about $350-$450. That’d probably cover the cost of special tools needed for a DIY job. A couple more refreshes, and it might start to make sense to invest in decent tools.

However, young guys will always buy too much bike, and subsequently wreck, so buying cheap ebay takeoffs might be the most fiscally sound version.

But then, the satisfaction of doing it yourself, and knowing it’s done right....
 

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Discussion Starter #19
The one place I looked, a refresh was about $350-$450. That’d probably cover the cost of special tools needed for a DIY job. A couple more refreshes, and it might start to make sense to invest in decent tools.

However, young guys will always buy too much bike, and subsequently wreck, so buying cheap ebay takeoffs might be the most fiscally sound version.

But then, the satisfaction of doing it yourself, and knowing it’s done right....
Just got a reply from a place in PA.....$200 parts and labor if it can be rebuilt. New spring would add $125 to that.
 

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I have installed a Racetech valve on a new OEM rear shock before. Assuming that you are mechanically inclined, it was not difficult. You may need some special tools, but Racetech should sell what you need. Sometimes you can also make the tools without much effort. I was not able to fill the bladder with nitrogen, so I had to take it to a local shop to have that done.


Aftermarket shocks typically have a higher build quality, and are also designed with service in mind. OEM shocks are typically designed to NOT be serviced.


I revalved the OEM shock because I was racing. I bought a 600 and a 750. I put an aftermarket rear shock on the 600 and simply revalved the 750's shock (due to budget). I never finished off the podium with the revalved 750 shock, so I was happy with the decision.


I serviced rear shocks once a year, and forks 2x per year.
 
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