delete

 

I did my homework on this last year and there are lots of options.

IQR springs have a 90* angle on them and essentially too much preload for a std IQ skid

the IQ skid uses a 77* spring, it is the same for the RMK skids and the shorter 121/136 skids


.347 (stock)
.359
.405

There is also a .375 spring that can be found for the Assault/RMK skids it also uses the 77* angle, not sure if anyone has put these on an IQ/pro-ride but I would think this might be the ideal spring.

 

I did my homework on this last year and there are lots of options.

.347 (stock)
.359
.375 (mostly found on intl models)
.405

The springs from the '05 fusion's to current will all work, so it needs to be an IQ skid not the edge skid.

Bocci, I'd say the .375's or the .405's but I had the .405's in the past on a fusion when I was 250 + and it was way too much spring. I think the .375's are the way to go for you.

The .405's were used when they first developed the IQ skid but haven't been used in a very long time as they are extreamly stiff, if you used your sled in Europe where grooming isn't really done, then I'd say 315 and no grooming might require the 405's you should give the .375's a try.

I find this very interesting. I just bought an intl model, is there an easy way to tell which ones I have without taking them off? I dont get to pick up my sled until next week so I wont be able to check until then, but I would be super happy if it came with the heavier springs!

 

http://parts.polarisind.com/Assemblies.asp

looks like the int'l models come stock with .359's

 

Thanks for that link! that is infinitely helpful and I have been looking for that.

I see 2 for rear torsion on intl.

7043079-067SPRING, TORSION, .359S, 12.5#, BLACK, LH [OPT][STD INTL]

7043080-067SPRING, TORSION, .359S, 12.5#, BLACK, RH [OPT][STD INTL]

Sweet! dont have to do anything now since the .359 was what I would have bought anyways thanks!

For any1 too lazy to go find it since links dont work here is the part list:

7043240-067SPRING, TORSION, .347S, 77, 9#, BLACK, LH [OPT]
7043071-067SPRING, TORSION, .347S, 80, 11#, BLACK, RH [OPT]
7043859-329SPRING, TORSION, .347S, 80, 10#, BLACK, LH [STD]
7043241-067SPRING, TORSION, .347S, 77, 9#, BLACK, RH [OPT]
7043070-067SPRING, TORSION, .347S, 80, 11#, BLACK, LH [OPT]
7043079-067SPRING, TORSION, .359S, 12.5#, BLACK, LH [OPT][STD INTL]
7043080-067SPRING, TORSION, .359S, 12.5#, BLACK, RH [OPT][STD INTL]
7043860-329SPRING, TORSION, .347S, 80, 10#, BLACK, RH [STD]

Even more happy about getting the intl model.

 

OK I must say I am happy now. I have switched to the #405 springs, and wow what a difference. I wasn't happy with the original spacer being so small with the larger diameter of the spring. I made some new spacers and I am right where I need to be. Thanks everyone for the input especially alsled. Ton of great information.

 

Very nice!

 

You have to remember as the spring works, the coils close tighter. Will yours bind now on that bigger spacer as the spring is compressed? If they bind, they will limit travel, locking up the skid.

 

Good point, though it looks like his spacers have at least as much room if not more than the smaller springs.

I just got my sled last friday and the stockers on the int. model seem perfect for me already at ~240 lbs

 

The old spacer OD was ~15% smaller than the ID of the coil. This spacer OD is ~20% smaller than the ID of coil. There isn't any binding when compressed.

 

springs

I have a pair of IQ 359's if anyone is looking.

I'm 220 geared up and ride aggressive trail.
Rode the IQ chassis with 359's using the high preload setting......got the right sag and decent performance.

The 405's are a bit wooden if you're not at least 275 IMO....

359 should have been the standard IQ spring spec....lighter riders (the minority) could have used the low preload...the average IQ rider is better off on 359's for sure.

 

Have to bring this one back from the archives, Going to change out my torsion springs. Since I extended my INDY to a 136, it seems to have excessive sag.
Not sure if my other INDY was like this but I really don't recall or think it was.
I got a set of bigboy springs from my Buddy, but there's excess clearance in between the spacer and inside of the torsion spring. This cant be normal?? And I see in the above post a bigger spacer was used. So can I use these springs with this much of a gap or do I absolutely need to make a thicker spacer?
These ones are from a 2006 Fusion. When I put them on the shaft, you cant get the spacer in the mounting bracket unless you put it in before you set the torsion springs into position.

 

And for the guys that installed the .359 springs, how much of a gap is there between the coils and spacer?

EDIT: looks like these ones I have are the 405s
7043129-067
SPRING-TOR.,405S,16.25#,RH,BLK [Opt]

 

I don't believe what you have going on there is normal. If memory serves me right I've only got 1/4" to 1/2" space around the spacer to the inside of the spring. I'll go out in my shed and snap a pic now...

Sent from my Moto Z (2) using Tapatalk

 

I lied. Much tighter than that. 1/16" to 1/8" all the way around is what I have. Stock suspension, except .359 springs....

Sent from my Moto Z (2) using Tapatalk

 

Ok thanks a lot Lueck. I figured it wasn’t right. I’ll Order me some 359s