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Dual rate front springs


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#1 Bogs59

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Posted 18 April 2017 - 08:16 PM

Just curious,those that have dual rate front springs on a 1200. Do you know what lbs spring rates you have? I was thinking a 160lbs main spring with a 400lbs tender spring may be a good replacement For a 140lbs single rate. The 160 main with 400 tender should give a progressive of 114/160.

#2 hemidoo

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Posted 18 April 2017 - 10:59 PM

I worked with Hygear to set mine up for my riding style , crossover spacing is just as important also when working with dual /triple rates .... 120# straight rate is stock .

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#3 hemidoo

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Posted 18 April 2017 - 11:02 PM

Coil binding the tender spring as doo does on the center shock with the rMotion isn't the best idea .

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#4 Maize

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Posted 18 April 2017 - 11:12 PM

Ross is great at setting up dual rates.

 

I work with him on my customer's as well.

 

I get my setups for my customer's from him, as well.

 

My front springs are are the PRO series with adjustable crossover.  I went with a 225 tender, and a 135 main spring for the skis.  For shocks, I am running 30* needle tips, a custom pressure balance valve with a 395 spring in the PBV and my custom valving.

 

7rbZhk.jpg

 

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The rear skid is Renegade R-Motion.

 

The center shock is using a PRO series with adjustable crossover and a 250 tender and 225 main spring.  The shock also got a custom Pressure Balance Valve with a 270lb spring and my custom valving.

 

QhF2UG.jpg

 

The rear springs are the next step stiffer with HyGear torsion spacers.

 

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There rear shock got the same treatment, a custom PBV with 395lb spring and my custom valving.

 

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#5 BADSLED

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Posted 19 April 2017 - 07:41 AM

Just curious,those that have dual rate front springs on a 1200. Do you know what lbs spring rates you have? I was thinking a 160lbs main spring with a 400lbs tender spring may be a good replacement For a 140lbs single rate. The 160 main with 400 tender should give a progressive of 114/160.

How did you arrive at the 114/160?   



#6 Bogs59

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Posted 19 April 2017 - 08:34 AM

How did you arrive at the 114/160?

It's a equation (main spring X tender spring) / (main spring + tender spring)
160 X 400=64000 / 160 + 400= 560
64000 / 560=114.28
114/160
So this give you your starting rate until the crossover slide bottoms out,then the rate increases to the main rate spring rate.

Another way of looking at is if it where a single 140lbs spring with 5" of travel you would multiply 140 X 5= 700 total combined pounds.
With a progressive if the 114 uses 2" of that stroke 114X2= 228 then the crossover bottoms out at which point there is 3" of stoke left with a rate of 160lbs. 160 X 3=480
So you Ad 480+228=708 total combined pounds At the end of the same 5" stroke
Similar final total pounds as the 140lbs spring but much softer initial rate,actually softer than stock 120lbs spring for the first 2".
Math and real world some times don't always work the way you want. So was hoping to find out what others have for spring rates.

Edited by Bogs59, 19 April 2017 - 09:15 AM.


#7 sea sled

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Posted 19 April 2017 - 10:37 PM

Ian from monster performance set my up perfectly
ride right = live to ride another day

#8 Maize

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Posted 20 April 2017 - 08:47 PM

I can get set up for a smooth ride with some of the best pricing in the industry.

 

Adjustable dual rate spring setups for $289.99/pair for the fronts, and $174.99 for a center.

 

Sport setup springs (which uses spacers and have to remove the springs to change spacers) for $249.99, and $149.99 for the center.

 

My summer pricing for revalving I will do $35/shock.  That is dissemble, clean, inspect seals, new Amsoil Shock Therapy oil and fresh nitrogen charge.

 

If you live in the United States....I will throw in shipping.

 

Complete package of Pro Series dual rate springs (front pair and center) and revalve all 4 shocks shipped to you in the states = $604.98, or about $75 less than most competitors..PLUS...you get the adjustable PRO series crossovers.

 

I also have packages available is you want to upgrade Pro40s with custom Pressure Balance valves, valve spring pressures and 30* needles.

 

Pro Springs and shocks revalved 


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Specializing in snowmobile shock

 

SERVICE WORK!

 

Fresh rebuilds, or fully custom valved to match you!


Helpful link for doing your own work:

http://www.dootalk.c...on#entry8564418



You can find all the ordering info on my website at:


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#9 zxmodv

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Posted 21 April 2017 - 05:35 AM

Are the pro crossover springs user friendly to set up maize? Or is it easy to get lost setting the sack and changeover point ?

#10 Maize

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Posted 21 April 2017 - 06:36 AM

Are the pro crossover springs user friendly to set up maize? Or is it easy to get lost setting the sack and changeover point ?

 

VERY easy....they have a set screw.  You just loosen the set screw and you can turn the adjuster.  If you lift that ski off the ground most time you can turn it by hand.

 

They are pretty easy to judge..if the ride is harsh, adjust away from the stop...if the ride is too soft, adjust towards the stop.

 

Once you get it dialed in just lock the set screw and you are done


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Specializing in snowmobile shock

 

SERVICE WORK!

 

Fresh rebuilds, or fully custom valved to match you!


Helpful link for doing your own work:

http://www.dootalk.c...on#entry8564418



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http://www.maizekust...-order-form.php



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#11 zxmodv

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Posted 21 April 2017 - 07:31 AM

Thanks maize.

#12 snowshreder

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Posted 21 April 2017 - 10:19 AM

The setup that I got from HY Gear was a 400 tender and a 150 main and the setup is perfect for the way I ride so I would guess the 400/160 would be good. I also set the cross over to give me the most time on the tender. two of my friends have the same setup and like it a bunch


Edited by snowshreder, 21 April 2017 - 10:20 AM.


#13 Bogs59

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Posted 21 April 2017 - 01:58 PM

The setup that I got from HY Gear was a 400 tender and a 150 main and the setup is perfect for the way I ride so I would guess the 400/160 would be good. I also set the cross over to give me the most time on the tender. two of my friends have the same setup and like it a bunch

Thanks was hoping someone would chime in with some real world spring rates. This at least gives me a starting point as I have a box of miscellaneous tenders and main springs I can try. I know I have a 400 tender and 160 main. May even have a 150 main I can start with. Your 150 main with a 400 tender works out to 109/150. So your starting rate is 109lbs till your crossover slide bottoms out.
Thanks again

Edited by Bogs59, 21 April 2017 - 02:05 PM.





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