08 700 Dragon 155 Rear Suspension Sag/mushy

[kfcoltn]

How much "no load" sag should I have on my 700 RMK Dragon rear suspension? It sags a good 3" with no rider on it and feels mushy on the top
4" of travel.
All shocks are stock Walker Evans Air with a fresh charge to 225 PSI. The stock torsion springs are set on the stiffest setting with the tension blocks.

After the this initial 3-4" sag it feels stiffer and more normal and with a rider on, it sags to 5-5 1/2", close to what the manual says it should be. Are yours the same way or is something wrong with mine?

Thanks, Tern

 

[AndrettiDog]

That's normal for the Dragons unfortunetely. Several guys go with the "fat boy" torsion springs that you can buy from Polaris. It is the cheaper (but still expensive) way to beef up the back. I did a Holz on my D7 and it was night and day. That sled was so much better with a new rear. My D8 will get some upgrade when I have the money.

 

[gerrman]

How much "no load" sag should I have on my 700 RMK Dragon rear suspension? It sags a good 3" with no rider on it and feels mushy on the top
4" of travel.
All shocks are stock Walker Evans Air with a fresh charge to 225 PSI. The stock torsion springs are set on the stiffest setting with the tension blocks.

After the this initial 3-4" sag it feels stiffer and more normal and with a rider on, it sags to 5-5 1/2", close to what the manual says it should be. Are yours the same way or is something wrong with mine?

Thanks, Tern

A couple of things to consider to help/fix the stock saggy rear on these machines. SLP makes a four position torsion spring adjuster block that will put more preload pressure on the spring. A fews guys in my area have these and is working better that the stock block for sag. The next consideration will depend on your geared up riding weight. Replace the stock torsion spring with the 0.359/47* if under 220 lb geared up. Same size as stock, just more preload. If you are over 220 lbs then go with the 0.375/47* springs. Both of these torsion springs are in the Polaris parts list. I have a '09 D8 163, am 250 lb geared up and put the 0.375/47* springs in. It is day and night the difference it made. The tunnel sits nice and high with no weight on the machine. The preload angle on these springs seems to be the answer to the sag/mushy problem. Good luck with the fix.

 

[kfcoltn]

Thanks for the info, it is good that nothing is wrong with my sled, but unfortunate we must live with this or spend money to improve it.

One other question, when I charge the rear skid W/E shock, it does not seem to take as much nitregen as the others, I assume that it is because it does not use gas as a spring, and only to pressurize the oil. Is this correct or does the shock supplement the torsion springs to help suspend the sled?