OEM spring rate on 2017 Husky FC350 ?

1/3/2018 3:52pm Edited Date/Time 9/5/2018 1:25pm
title says it all... anyone know?
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captmoto
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1/3/2018 6:15pm
Don't you have a manual? Or Google?
Bruce372
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1/3/2018 6:36pm
2017 fc450 was a 4.5 if that helps.

A lot of people want to fit a new linkage, but you should be able to find a good spring.

105mm sag and upto 10mm preload on the spring. I just undo the two linkage bolts, loosen the preload, then the spring clip and drop the spring out of the bottom without removing the shock
1/3/2018 6:40pm
captmoto wrote:
Don't you have a manual? Or Google?
Manual lists 3 different spring recommendations based on the rider's weight. Doesnt specify which actually comes on the bike.

39 Nm
42 Nm
45 Nm

Ive checked the OEM microfiche... oddly enough a 42 Nm isnt listed as a part that I can order. It lists the other two and a few more.

That had me thinking 42 was the showroom spec until I called a aftermarket suspension company. They were under the impression 45 was OEM.

An MXA article claims 42 as well. I figured I'd ask here just to confirm.
leighracer
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1/3/2018 6:40pm
42Nm it should be written on the spring.

The Shop

1/3/2018 6:45pm
Bruce372 wrote:
2017 fc450 was a 4.5 if that helps. A lot of people want to fit a new linkage, but you should be able to find a...
2017 fc450 was a 4.5 if that helps.

A lot of people want to fit a new linkage, but you should be able to find a good spring.

105mm sag and upto 10mm preload on the spring. I just undo the two linkage bolts, loosen the preload, then the spring clip and drop the spring out of the bottom without removing the shock
I did fit a new linkage. The Pro Circuit. The bike sat way lower and I felt more comfortable. But the sag numbers are way off. The (suspected) 42 OEM spring didnt match my weight (too stiff) so I was gonna order a lighter spring. But the PC calls for going up two sizes. So in theory the OEM 42 shoulda been perfect with the PC linkage. But it wasnt.

Looks like I need to go stiffer. I just want to make a educated guess based on what Im already running. Which I strongly suspect is a 42 Nmm / 4.3 kg.... I just wanted to confirm here.
1/3/2018 6:47pm
Bruce372 wrote:
2017 fc450 was a 4.5 if that helps. A lot of people want to fit a new linkage, but you should be able to find a...
2017 fc450 was a 4.5 if that helps.

A lot of people want to fit a new linkage, but you should be able to find a good spring.

105mm sag and upto 10mm preload on the spring. I just undo the two linkage bolts, loosen the preload, then the spring clip and drop the spring out of the bottom without removing the shock
Nice tip on getting the spring to drop out. You think I could get the pre-load collar to fall out as well? I have one of the billet adjusters I want to swap in there all at the same time so adjusting preload is no longer a bitch.
slipdog
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1/3/2018 7:00pm
Stock is 42n, I have 2 in my shop right now.
1/3/2018 7:05pm
slipdog wrote:
Stock is 42n, I have 2 in my shop right now.
thank you very much.

I gonna order the OEM 45n, that should do the trick.
Bruce372
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1/3/2018 8:08pm
Bruce372 wrote:
2017 fc450 was a 4.5 if that helps. A lot of people want to fit a new linkage, but you should be able to find a...
2017 fc450 was a 4.5 if that helps.

A lot of people want to fit a new linkage, but you should be able to find a good spring.

105mm sag and upto 10mm preload on the spring. I just undo the two linkage bolts, loosen the preload, then the spring clip and drop the spring out of the bottom without removing the shock
Nice tip on getting the spring to drop out. You think I could get the pre-load collar to fall out as well? I have one of...
Nice tip on getting the spring to drop out. You think I could get the pre-load collar to fall out as well? I have one of the billet adjusters I want to swap in there all at the same time so adjusting preload is no longer a bitch.
That's the problem, in order to swap out the preload adjuster, you have to take the shock apart!

I have the x trig, changing a spring is a 2 minute job!
Bruce372
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1/3/2018 8:32pm
Bruce372 wrote:
2017 fc450 was a 4.5 if that helps. A lot of people want to fit a new linkage, but you should be able to find a...
2017 fc450 was a 4.5 if that helps.

A lot of people want to fit a new linkage, but you should be able to find a good spring.

105mm sag and upto 10mm preload on the spring. I just undo the two linkage bolts, loosen the preload, then the spring clip and drop the spring out of the bottom without removing the shock
I did fit a new linkage. The Pro Circuit. The bike sat way lower and I felt more comfortable. But the sag numbers are way off...
I did fit a new linkage. The Pro Circuit. The bike sat way lower and I felt more comfortable. But the sag numbers are way off. The (suspected) 42 OEM spring didnt match my weight (too stiff) so I was gonna order a lighter spring. But the PC calls for going up two sizes. So in theory the OEM 42 shoulda been perfect with the PC linkage. But it wasnt.

Looks like I need to go stiffer. I just want to make a educated guess based on what Im already running. Which I strongly suspect is a 42 Nmm / 4.3 kg.... I just wanted to confirm here.
So once you've swapped linkages, how are you determining correct spring rate? Sag and static sag, or sag and preload?

The problem is see is the more things you change like linkage, just means more variables to tune and more parts to tune.
1/3/2018 9:39pm
Bruce372 wrote:
So once you've swapped linkages, how are you determining correct spring rate? Sag and static sag, or sag and preload? The problem is see is the...
So once you've swapped linkages, how are you determining correct spring rate? Sag and static sag, or sag and preload?

The problem is see is the more things you change like linkage, just means more variables to tune and more parts to tune.
Static Sag & Riding Sag.

Yeah, you’re right, more variables... more to tune.

Im sorta confident that the 45n will fix the sag issue. Once I get the sag settings right I expect to be happy but if not, then I’ll start playing with the clickers.

This is the first bike Im getting ultra picky with on everything. There’s so much to gain from proper suspension setup and the stock WP stuff works really well if matched to the rider. Hopefully I can get it good enough w/o a revalve for the time being.

Then I’ll eventually order some Cone Valve AERs & Traxx down the road. Lol. It never ends.
1/4/2018 12:11pm
Bruce372 wrote:
That's the problem, in order to swap out the preload adjuster, you have to take the shock apart! I have the x trig, changing a spring...
That's the problem, in order to swap out the preload adjuster, you have to take the shock apart!

I have the x trig, changing a spring is a 2 minute job!
Any advice on getting this shock apart?

Im really regretting this damn preload adjuster. What a pain in the ass they've made it to get this thing installed.
Bruce372
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1/4/2018 12:23pm
Bruce372 wrote:
That's the problem, in order to swap out the preload adjuster, you have to take the shock apart! I have the x trig, changing a spring...
That's the problem, in order to swap out the preload adjuster, you have to take the shock apart!

I have the x trig, changing a spring is a 2 minute job!
Any advice on getting this shock apart? Im really regretting this damn preload adjuster. What a pain in the ass they've made it to get this...
Any advice on getting this shock apart?

Im really regretting this damn preload adjuster. What a pain in the ass they've made it to get this thing installed.
I was in a time crunch so it was the first time I've paid someone to do my suspension and I regret that! The tuner sold me a spring and revalved, and once I figured the setup was no better, the tuner tried to sell me an entire linkage and new spring.

After talking to another tuner, I realized the spring i was sold was way off, so the new guy supplied the right one and the bike worked good now.

If I had a do over, I would just do a bladder convo myself so I can service and fit a non plastic adjuster.
1/4/2018 2:41pm
Bruce372 wrote:
I was in a time crunch so it was the first time I've paid someone to do my suspension and I regret that! The tuner sold...
I was in a time crunch so it was the first time I've paid someone to do my suspension and I regret that! The tuner sold me a spring and revalved, and once I figured the setup was no better, the tuner tried to sell me an entire linkage and new spring.

After talking to another tuner, I realized the spring i was sold was way off, so the new guy supplied the right one and the bike worked good now.

If I had a do over, I would just do a bladder convo myself so I can service and fit a non plastic adjuster.
Did you leave the thin spacer plate that protects the OEM plastic preload adjuster from the spring? Or did you remove it with the new preload adjuster.

I figured out that the reason Husky doesnt include any instructions with this pieces is that they dont want anyone but a suspension specialist doing the install.
1/7/2018 10:29pm
slipdog wrote:
Stock is 42n, I have 2 in my shop right now.
The 42n that I have is 260mm (Im assuming yours are the same).

The 45n that I see on the microfiche is 247mm.

WP does make 45n @ 260. Is that what I shouldve ordered? Im a bit confused.
Bruce372
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1/7/2018 11:38pm Edited Date/Time 1/8/2018 7:21am
slipdog wrote:
Stock is 42n, I have 2 in my shop right now.
The 42n that I have is 260mm (Im assuming yours are the same). The 45n that I see on the microfiche is 247mm. WP does make...
The 42n that I have is 260mm (Im assuming yours are the same).

The 45n that I see on the microfiche is 247mm.

WP does make 45n @ 260. Is that what I shouldve ordered? Im a bit confused.
I've got the x trig so it doesn't need the plate.

From memory, the spring on the 450 is a 45 and it was 260mm
aees
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1/8/2018 2:20am
slipdog wrote:
Stock is 42n, I have 2 in my shop right now.
The 42n that I have is 260mm (Im assuming yours are the same). The 45n that I see on the microfiche is 247mm. WP does make...
The 42n that I have is 260mm (Im assuming yours are the same).

The 45n that I see on the microfiche is 247mm.

WP does make 45n @ 260. Is that what I shouldve ordered? Im a bit confused.
Does not matter, you can use whatever you prefer with same results (just slightly more weight with a 260mm spring)
Vet57
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1/8/2018 6:02am
thank you very much.

I gonna order the OEM 45n, that should do the trick.
I have a brand new oem 45 in the box if you're interested.
1/8/2018 11:13am
thank you very much.

I gonna order the OEM 45n, that should do the trick.
Vet57 wrote:
I have a brand new oem 45 in the box if you're interested.
PM sent.
Vet57
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1/8/2018 1:26pm




9/5/2018 1:25pm
Bruce372 wrote:
2017 fc450 was a 4.5 if that helps. A lot of people want to fit a new linkage, but you should be able to find a...
2017 fc450 was a 4.5 if that helps.

A lot of people want to fit a new linkage, but you should be able to find a good spring.

105mm sag and upto 10mm preload on the spring. I just undo the two linkage bolts, loosen the preload, then the spring clip and drop the spring out of the bottom without removing the shock
Which linkage bolts do you loosen?

Are you able to leave the pull rod connected to the swingarm (front) and still drop the spring out?
9/5/2018 1:38pm
Bruce372 wrote:
That's the problem, in order to swap out the preload adjuster, you have to take the shock apart! I have the x trig, changing a spring...
That's the problem, in order to swap out the preload adjuster, you have to take the shock apart!

I have the x trig, changing a spring is a 2 minute job!
Also, another question, when you re-install the linkage to the bottom of the shock absorber, the manual calls for Loctite 2701, which is permanent thread locker.

I have 271 red

I also have 242 blue

Which should I use?

The guys over at this forum are convinced Husky made a typo: https://www.southbayriders.com/forums/threads/128082/

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