Bought two sets of polished wirth progressive springs for Ceriani 35 and 38 mm.I use Wirth Springs from these people https://www.brooksuspension.co.uk/fork-springs/wirth-fork-springs/
It's supposed to bind Vince. That's how it works. If you select a closely wound spring that's so stiff that it'll never bind, you'll have created a single rate spring system.Ohlin's on my 82 Husky came with dual rate or 2 separate springs. One long and one short, the later soaked up small bumps, in my case it would completely spring bind so I needed the heaviest rate one
Ok, that's a different scenario to what I was imagining. I guess it's intended for a lighter rider than you. So yeah, if it binds up as soon as you sit on the bike then you need a stronger small spring. As Quentin said, the springs should be the a similar rate. I guess single springs wound as a dual rate are a better match than two separate springs. Both parts of the spring are wound from the same piece of wire, so will compress at similar rates until the closely wound section closes up.I take tour point Cam but that short softer spring went bound with just my weight sitting on it, it did nothing at all except become a solid spacer.
That is the only site that comes up for me Clem. Could you give a link to a different one for us.make sure you are looking at the Racetech USA site
FWIW, Tippie, it's what the UK importer (PDQ Motorcycle Developments) came up with for my Corsa (me, same weight as thee).<snip> When I put in a Corsa with 80kg rider, normal riding, it had 0.85 springs, lighter than it had recommended for my SF.