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Old October 10th, 2021, 02:47 PM   #1
JayVapes
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I'm about to lose my 💩

Guys can I please get some help, I'm so confused and lost on my rear suspension. Is there a shock I can buy that is taller and fits perfectly on our bikes?
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Old October 10th, 2021, 07:18 PM   #2
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Doesn't the Ninja 300 shock bump it up a little under an inch? They bolt right in, and they're cheap.
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Old October 10th, 2021, 08:41 PM   #3
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What problem are you trying to solve with longer shock?
Do you really need taller shock or just stiffer?

Pre-gen is 440-lb/in, new-gen/300 is 475-lb/in.
The new-gen/300 shock is slightly longer at 320mm.

For bolt-on shocks, check out my thread with measurements here:
https://www.ninjette.org/forums/showthread.php?t=337292

Another bolt-on 320mm shock is this one (ignore photo, it actually has clevis lower mount: https://www.progressivesuspension.co...shock-kawasaki

There is also SV650 and GSX-R shock retrofits, but requires machining of frame and shock to fit (in some cases, cutting fender & battery box). More involved that just swapping clevis on shock you already bought.


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Old October 10th, 2021, 09:13 PM   #4
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as mentioned elsewhere, just need to replace lower eyelet with clevis on shock you have. Take some measurements to know what you'll need using one of these: https://www.harborfreight.com/search...ity%20calipers- search for "6-in utility caliper"

Measure, then see if any of these will fit. Very all dimensions such as width, hole size, threading first. Note bottom shock bolt is not same size as top.

https://www.speedwaymotors.com/RideT...ck,338936.html
https://hawkmotosport.com/racing-bro...r-ea-r3070085/
https://www.winnerscircle.com/collec...ducts/all99331
https://power-barn.com/gazi-suspensi...tended-clevis/
https://www.ebay.com/itm/362892629966
https://allstarperformance.com/amp/s...cers-all99331/
https://afterdarkspeed.com/product/8...nt-adapter-kit

Heck, you can even make your own using bar-stock from Home Depot.

Last futzed with by DannoXYZ; October 13th, 2021 at 09:55 AM.
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Old October 11th, 2021, 07:09 AM   #5
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Quote:
Originally Posted by JayVapes View Post
Guys can I please get some help, I'm so confused and lost on my rear suspension. Is there a shock I can buy that is taller and fits perfectly on our bikes?
A shock from a 2008-2012 Ninja 250 is an inexpensive replacement and drops right in.

It is longer, and has preload adjustment - plus they are cheap. Not sure about anything newer (300), but we installed one on our PreGen - and it was an improvement.
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Old October 11th, 2021, 08:17 AM   #6
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Originally Posted by DannoXYZ View Post
Thanks for this info Danno.

What's the meaning of the column 'Reservoir Fit' (Yes/No)? Does it indicates if it fits in the EX250/EX300?

I ask you this because I see the 03-04 GSXR1000 does not fit, but you still bought it?

So, some of them are longer than the stock and will actually raise the rear of the bike, right? I had always heard that swapping to a GSX shock would lower the rear of the bike.

Can these old GSXR shocks be serviced and rebuilt?
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Old October 11th, 2021, 08:53 AM   #7
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I just copied that off from posts... kkim made I think. Apparently there's A LOT of work involved in adapting those. I'm not sure about lowering effects, that may have been from moving dogbone pivots around to clear wider shock?

Here's some other ideas for my other bike that's commonly done:
http://vfr800rr.blogspot.com/2012/08...rsion.html?m=1

Also you can make your own shorter dogbones to raise ride height and increase shock-leverage. I made them from aluminium to save couple lbs on my race bike (stock length).
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Old October 13th, 2021, 12:18 AM   #8
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Quote:
Originally Posted by thedrewski86 View Post
Doesn't the Ninja 300 shock bump it up a little under an inch? They bolt right in, and they're cheap.
I have been concerned about buying used shock absorbers so I went the long way and bought some new Chinese shocks I didn't check to see if they would fit. I checked out the thread describing the different shocks for the different generations and it was very informative. Has anyone had experience buying used shock absorbers? How does one go about choosing? I wouldn't mind going with the new gen or the ex500 or the one with the adjustable collar to put a stiffer spring.
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Old October 13th, 2021, 01:56 AM   #9
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Ex500 has softest shock out them all. Many of them install Ninja 250 shock as upgrade.

Again, what problem are you experiencing that different shock would solve?

Wouldn't be that difficult to remove clevis from 250 shock and install on your new one...
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Old October 13th, 2021, 05:18 AM   #10
JayVapes
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Quote:
Originally Posted by DannoXYZ View Post
What problem are you trying to solve with longer shock?
Do you really need taller shock or just stiffer?

Pre-gen is 440-lb/in, new-gen/300 is 475-lb/in.
The new-gen/300 shock is slightly longer at 320mm.

For bolt-on shocks, check out my thread with measurements here:
https://www.ninjette.org/forums/showthread.php?t=337292

Another bolt-on 320mm shock is this one (ignore photo, it actually has clevis lower mount: https://www.progressivesuspension.co...shock-kawasaki

There is also SV650 and GSX-R shock retrofits, but requires machining of frame and shock to fit (in some cases, cutting fender & battery box). More involved that just swapping clevis on shock you already bought.

Hi Danno. So the first problem I'm trying to solve is to give me a little more height on my bike. I'm 6'1 and a whole 250 lbs. The shock that was on my bike no long had a good compression. The bike would sag under its own weight. That is mainly the problem I'm trying to solve. However the shocks I purchased seem to be giving me couple of problems. I don't know how to measure for the clevis adapter and secondly I think this rfy shock will bottom out on the swing arm.
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Old October 13th, 2021, 05:53 AM   #11
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What happened to that chain?

I have a newgen rear shock on my pregen 250. It made a significant difference in reducing sag. With gear I weight about 185, and the stock shock would bottom on large bumps in the road. The newgen shock does not bottom on bumps. It was $25 shipped from eBay.
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Old October 13th, 2021, 07:28 AM   #12
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What happened to that chain?
^^ +1 LOL Put some grease on that chain.
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Old October 13th, 2021, 07:29 AM   #13
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Jay, I would say that most folk on here have experience buying used shock absorbers; I certainly do. It's nothing to be concerned with. As a matter of fact, buying an unknown Chinese shock would be much more concerning to me than a used shock made by Kawasaki specifically for our bikes.
The reservoir on the piece you bought will hit the swingarm, so a new clevis is not going to help. It does not fit, period. I would return it and buy a 250 or 300 shock off ebay as Jim suggested. 250lbs is not too much for either of those shocks and either one will bolt right in.
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Old October 13th, 2021, 09:30 AM   #14
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Originally Posted by JayVapes View Post
Hi Danno. So the first problem I'm trying to solve is to give me a little more height on my bike. I'm 6'1 and a whole 250 lbs. The shock that was on my bike no long had a good compression. The bike would sag under its own weight. That is mainly the problem I'm trying to solve. However the shocks I purchased seem to be giving me couple of problems. I don't know how to measure for the clevis adapter and secondly I think this rfy shock will bottom out on the swing arm.
That shocks you purchased look like it is for pitbike with progressive spring rate coil over.
The first problem is going be that is look like the reservoir is going to hit the swing arm.
Just go be back to stock shocks and need beefer spring to better suited for your weight check round or read this page
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Old October 13th, 2021, 09:08 PM   #15
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The bike had sat outside under a carport for a year and in my area we usually have morning dew because of the humidity. I scrubbed off some of the rust on part of the chain and it looks pretty much brand new. I had the chain installed and perhaps put about a couple thousand miles on it before someone stole my key and I had to keep it parked.
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Old October 13th, 2021, 09:09 PM   #16
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Thank you all very much. I have learned quite a bit and look forward to grabbing a new gen shock from Danno.
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Old October 14th, 2021, 11:25 AM   #17
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Quote:
Originally Posted by JayVapes View Post
Thank you all very much. I have learned quite a bit and look forward to grabbing a new gen shock from Danno.
Good thing we didn't spend too much effort installing clevis on your new shock. Didn't take close look at comparison before. Yes, it looks like something for small bike as it's very soft:

- coil-spring with smaller wire-diameter is softer
- coil-spring with more coils is softer

So result would've been this new shock would've had more sag than worn-out 250 shock. And its lower spring-rate would have you use up all suspension-travel and bottom out even more often over bumps!



The new-gen 250 shock I'm sending you has one less coil than pre-gen, with thicker wire-diameter for higher spring-rate.

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Old October 14th, 2021, 07:01 PM   #18
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Good thing we didn't spend too much effort installing clevis on your new shock. Didn't take close look at comparison before. Yes, it looks like something for small bike as it's very soft:

- coil-spring with smaller wire-diameter is softer
- coil-spring with more coils is softer

So result would've been this new shock would've had more sag than worn-out 250 shock. And its lower spring-rate would have you use up all suspension-travel and bottom out even more often over bumps!



The new-gen 250 shock I'm sending you has one less coil than pre-gen, with thicker wire-diameter for higher spring-rate.

thank you very much! I appreciate the help immensely I'm excited to get the shock on and start to put the bike together.
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