I have just acquired an 86 TRX250R, and it has a pair of White Power front shocks. These units have a piggyback resevoir with compression adjustment. The also appears to be adjustable, but it is not a threaded adjustment. There seems to be different "notches" for the spring retainer.

Does anyone else have these shocks, or has anyone seen some in the past? I am trying to figure out if I need a spring compressor or something to adjust the spring position.