Dust Seal, Fr.fork Z50jw Gorilla Japan

These parts suffer from U.V exposure, causing the part to degrade on turn hard and brittle! Unfortunately to replace these parts you have to drop your whole front end down through the triple tree, so as they are inexpensive, why not replace them with new whilst carrying out other fork related work?
For your entire front forks area parts and consumables, check out the online catalogue or 'parts list' fiche for your model, this may help you specify ALL the parts you require for a satisfactory out come when overhauling your forks.