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I can't comment on the 970s, but have Ohlins, courtesy of HDF sponsor Motorcycle Metal. Howard there now supplies JRI as well and will custom build them and Ohlins.
The only thing JRI or Ohlins changes at the factory is the external spring based on weight and type of riding. The internals are the same on each model of shock. This is directly from both companies. Both can be rebuilt, at your cost. I think the Progressives come with a lifetime warranty and they rebuild for free. Need to double check that.
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