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orientation progressive springs

Brendan W

Brendan W

Forum Sage
Past Site Supporter
Changed the fork oil yesterday and one of the springs was upside down. But which one? Why are progressives supposed to be close end up?
 
Thank you. I noticed the difference in the unsprung immediately:)
Deliberately overfilled and got a lot of dark grey stuff out until it ran clear. Springs are longer than stock 474mm and the spacer is a one inch aluminium plug with an o-ring on the outside and four position ramp preloaders on top - no air.
Suzuki manual says Caution about the orientation and I was wondering why. Could they end up anti-,progressive?
 
I've always (car and bike) mounted them with closer-wound coils to the top - works well enough for me.
Progressives often work well, but not on every application and not under all circumstances. Sometimes they're a waste of money and the suspension requirements would be better served with a straight spring of the correct rate.
 
Could I be using the wrong term here. There doesn't seem to be progressive change in pitch- is bilinear the right name?
 
Brendan W said:
Could I be using the wrong term here. There doesn't seem to be progressive change in pitch- is bilinear the right name?
Click to expand...

How about Duo-Rate (sounds fancy enough to get some to part with the cash).
 
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