Does anyone have any experience with progressive rate springs for the PDS shock? I think the progressive rate may interfere with the damping settings, meaning the damping may be hard to dial in correctly. Is this true? I have to stiffen up the rear and I have the option to go progressive or stay with a straight rate spring. Any advice is appreciated.
Progressive rate PDS
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The important thing is that they are valved to suit the spring. My mate Frank pons, one of Oz's best suspension guys doeasn't use progressives and gets bestter results with straight rates. Remember that the geometry of the shock and swingarm does give some progression too, as does the PDS shock, which has 2 valve bodies inside.
It was interesting years ago that when Berg/KTM has progressives stock, the after market sold straight rate as the preferred choice. When they went sr, the aftermarket went progressive.
Most important is to get the spring that gives you the right sags, and then get the valving right to suit the riding you do, and your abilities.
Steve
It was interesting years ago that when Berg/KTM has progressives stock, the after market sold straight rate as the preferred choice. When they went sr, the aftermarket went progressive.
Most important is to get the spring that gives you the right sags, and then get the valving right to suit the riding you do, and your abilities.
Steve
steve said:
Hey Steve,
Good point on the springs...............
The back story. The early PDS shocks had a long tapered by pass cut off needle and came with a progressive spring, this long tapered needle negated the need for the progressive spring. Later, they changed the needle profile to short and stubby, which then created the need for a progressive spring.
Dale
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Hi, does anybody know what is the stiffness description, i mean the number on it in form e.g.: WP 76-95/260 (my actual spring (PDS-7) being too soft for my 100kg naked) of black rear spring from limited model FORCE sold in 2004 or 2005? the spring is progressive and 13,4mm thick. Thanks for answer!!!
ned37
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i weigh about the same and that same spring was on my '02 650 fx and i felt it was too stiff , especially in the rocky trails we have here. if i rode it all the time in actual dirt with jumps, it prolly would have been ok. a lot of the feel depends on how the shock is set up as well as the terrain you ride. the numbers indicate the weight/force required to move the spring a given distance. the different numbers apply to the 2 different rates of the spring, and the 260 is the length.
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Thanks for answer, but I understand what the numbers mean, I need to know what numbers are written on the "force" shock. Maybe my question was not well formulated. If you know, please tell me. You say, you are the same weight and was stiff? SO more for fast countrycross/motocross than for technical snake-like riding?ned37 said:
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I do not know why, but we still do not understand each other. I know the parameters for the PDS-7 spring, I had it on my bike till now, it is not enough stiff for me, it is for rider 155LBS naked (I am 220LBS naked). I need to know the parameters for black "Force" spring, because there is nothing written on the spring and the seller of it is not able to tell me how strong it is (he only says that for him, being 185LBS naked, the black spring is too stiff ). Thanks.ned37 said:
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the spring was the same as standard. so you need to look up the owner's manual for the spring for that year. there is of course the chance that in 8 years it has been changed at least once!
the largest progressive was a 99-111 and that was just about right for my 195LB. MX tech do the only size left after that that is a progressive. I nearly went for it.
if you want a straight rate then go for something like a 98
regards
Taffy
the largest progressive was a 99-111 and that was just about right for my 195LB. MX tech do the only size left after that that is a progressive. I nearly went for it.
if you want a straight rate then go for something like a 98
regards
Taffy
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Maybe the seller of the black spring only thinks it is from force model. all force models on internet pics have a white spring and I remember, when I once saw the force model live, it had white spring also. if the black spring will be too stiff, I will go for FCW-4 by Factory Connection, it is 85-11. I need progressive spring, I have shock from 2003 it is designed inside for progressive spring (shape of needle). for the front end I am going for Ohlins 0.50 or 0.48 (I have some spare preload rings now in my fr.fork). Thanks to all!Taffy said:
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