17 KTM 450 shock spring ???

Johnnygunn
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Johnnygunn
Bought a 17 ktm 450, I weigh 210, the spring that's on it is a 42-200. I set my rider sag to 105mm, but the static sag is 41mm, supposed to be 35mm. I put a 5.2 on it and I can't even get the rider sag close to 105 without running out of threads, so didn't even worry about static. I got on the bike, bounced a few times, sat in the riding position and measured like always. Any suggestions on springs, tricks, or am I doing something ignorant (which has been known to happen..)? If 41 mm won't affect anything too bad, then I'm ok with it! It's also worth noting the suspension was done before I got it and the only info I have is he rode woods/mx. Just want some feedback before I go send it and swap out. Thanks.
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MPJC
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MPJC 3/12/2019 7:10pm
3/12/2019 7:10pm
I’m a similar weight and I use a 4.8 - works perfectly.
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Ron_Shuler
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Ron_Shuler 3/12/2019 7:30pm
3/12/2019 7:30pm
You need the stock 47-247 spring if you get that start out with about 8mm of pre-load should get you close to 105mm sag. Or since you have the 5.2 spring I would highly recommend getting the Pro Circuit KTM linkage I run this and it works great makes the bike plusher and more resistant to bottoming
Bruce372
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Bruce372 3/12/2019 7:31pm
3/12/2019 7:31pm
5.2 should be about right for 210.

With the sag at 105, you should have around 6mm on the spring.

FWIW if you put the bike on the stand, you can loosen the preloader, undo the linkage bolt and drop the spring out the bottom without taking the shock off
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leighracer
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leighracer 3/12/2019 7:50pm
3/12/2019 7:50pm
Ron_Shuler wrote:
You need the stock 47-247 spring if you get that start out with about 8mm of pre-load should get you close to 105mm sag. Or since...
You need the stock 47-247 spring if you get that start out with about 8mm of pre-load should get you close to 105mm sag. Or since you have the 5.2 spring I would highly recommend getting the Pro Circuit KTM linkage I run this and it works great makes the bike plusher and more resistant to bottoming
What length is your new spring? 200mm is too short. If you stick with the stock linkage you need to go to a 48-247 or the 48-260 from the 2018 and newer bikes will actually work too and put your collar in a higher position on the body. This has the added benefit of making it easier to reach in and make preload adjustments.

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RCF
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RCF 3/13/2019 11:47am
3/13/2019 11:47am
You should have a 5.0 , same thing happened when I tried putting a 5-2 on my kids bike. he's the same weight as you. I didn't think 0.2 would make a difference but it does.
Ron_Shuler
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Ron_Shuler 3/13/2019 1:18pm
3/13/2019 1:18pm
Ron_Shuler wrote:
You need the stock 47-247 spring if you get that start out with about 8mm of pre-load should get you close to 105mm sag. Or since...
You need the stock 47-247 spring if you get that start out with about 8mm of pre-load should get you close to 105mm sag. Or since you have the 5.2 spring I would highly recommend getting the Pro Circuit KTM linkage I run this and it works great makes the bike plusher and more resistant to bottoming
leighracer wrote:
What length is your new spring? 200mm is too short. If you stick with the stock linkage you need to go to a 48-247 or the...
What length is your new spring? 200mm is too short. If you stick with the stock linkage you need to go to a 48-247 or the 48-260 from the 2018 and newer bikes will actually work too and put your collar in a higher position on the body. This has the added benefit of making it easier to reach in and make preload adjustments.
I am using the Factory Connection Spring 5.2 I believe they are 260mm, I had to go with it because if you use a X-trig spring adjuster you can't get to the 8mm on the adjuster cause it can hit the pipe if you start putting more than 10mm of p reload on the spring
Bruce372
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Bruce372 3/13/2019 2:39pm
3/13/2019 2:39pm
If you look at the older ktms when they went from pds to a linkage, you can find the take off springs in the 5.0 plus rate.

Remember they set these up different, 6mm preload with 105mm rider sag is a good start
stumpy823
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stumpy823 3/13/2019 3:14pm
3/13/2019 3:14pm
I’m 240 lbs and have a 17 also what spring should I be running
Bruce372
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Bruce372 3/13/2019 3:30pm
3/13/2019 3:30pm
stumpy823 wrote:
I’m 240 lbs and have a 17 also what spring should I be running
5.5 imo. I am 240 and that's what I am running. Perfect numbers, plus it holds the bike up better and makes the forks work...

Just my opinion.....
stumpy823
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stumpy823 3/13/2019 5:09pm
3/13/2019 5:09pm
Bruce372 thanks for info
stumpy823
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stumpy823 3/13/2019 6:09pm
3/13/2019 6:09pm
Ronnie_Gardner I have the 4.8 cant get 105mm sag
stumpy823
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stumpy823 3/13/2019 6:50pm
3/13/2019 6:50pm
Ronnie _Gardner I apologize I have the 4.5 off of a 16
Bruce372
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Bruce372 3/13/2019 7:24pm
3/13/2019 7:24pm
Sorry guys, but 4.8 isn't gonna cut it if you are 240lbs.
slipdog
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slipdog 3/13/2019 7:43pm
3/13/2019 7:43pm
Bruce is correct
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Bruce372
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Bruce372 3/13/2019 10:06pm
3/13/2019 10:06pm
slipdog wrote:
Bruce is correct
Thanks mate, that means a lot from someone that does this for a living!
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Johnnygunn
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Johnnygunn 3/20/2019 8:11pm
3/20/2019 8:11pm
A suspension guy said my shock may have been shortened because of the lack of threads vs the spring rate and sag numbers etc .. I'm not sure, but the bike feels normal under me when I sit on it, just soft. Will try another spring recommended and go from there. The suspension isn't even close to set up for me and the bike still handles like a champ. Loving it so far.
Bruce372
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Bruce372 3/20/2019 8:39pm
3/20/2019 8:39pm
If your shock had been shortened just a few mm, it would sit a lot lower because of the linkage ratio.

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stumpy823
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stumpy823 3/25/2019 11:48am
3/25/2019 11:48am
Bruce372 I got the 5.5 spring what you running air pressure in forks and clickers all the way around trying to find a good starting point thank you in advance
Bruce372
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Bruce372 3/25/2019 12:03pm
3/25/2019 12:03pm
stumpy823 wrote:
Bruce372 I got the 5.5 spring what you running air pressure in forks and clickers all the way around trying to find a good starting point...
Bruce372 I got the 5.5 spring what you running air pressure in forks and clickers all the way around trying to find a good starting point thank you in advance
145 plus or mind 5 lbs mate.

Get the shock dialed in first... its .my first Austrian bike, I was blown away by how much difference the high speed adjuster makes on the shock.
stumpy823
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stumpy823 3/25/2019 12:17pm
3/25/2019 12:17pm
Wow I’ve been told 165psi for my weight I had been running 154-157

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