| how come the topic has drifted from shock to forks, anyway yes you can fit a Ohlins spring to a showa shock, or a WP spring or any other 2 1/42 diameter spring to the shock, Demon tweeks sell a good range of suitable linear rate springs, used one of theirs on a friends 600SS.
As for Showa doing Ohlin stuff< I wouldn't have thought so personally as yamaha have a big stake in Ohlins and I believe Honda have a big stake in Showa. | 
skidlids
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