The thread stripping seems to be a common problem. And of course you cannot buy the adjuster only as a spare part...K100Dennis said:So is this a maintenance issue ? Do we need to be periodically lubricating the preload adjuster threads ? My stock '05 Showa 1 always feels a bit firm but I've never screwed it out to look at the thread. I imagine that being a threaded device and often used, it may need lubricating. I'll check mine shortly as I received my Wilbers yesterday.
I would highly recommend keeping this adjuster thread well lubricated. As it is designed (cheap) the thread looks like just a standard screw / bolt thread and as I see both the nut and bolt part are steel. This works OK in a once tightened regular bolt but if this adjuster is frequently used it should be well greased.