I've got a 46PRXLB for my '07 about a week ago and still haven't installed it. So I have it in my hand and I have uploaded a photo. First, I'd say the adjuster is probably a worm/ring gear mechanical affair rather than pneumatic or hydraulic. No matter. Also, it looks like the body is threaded and not just grooves for a circlip. If you take a closer look at the photo you'll see a pin that ties the spanner nut to the preload adjustment mechanism. I'd say you wouldn't be able to rotate the spanner nut beyond the point where the mechanism contacts the reservoir unless you remove this pin first. I don't know exactly how the pin is retained but I would be a little leary about removing it in case you can't get it back in there properly.On the Ohlins rear shock, there is the pheumatic preload adjustment. It allows a fine adjustment to preload on the bike. Can the preload be changed in a more coarse manner, such as using a spanner tool? <snip>
I'd say its best to stick with the fine adjustment. Its a minor pain in the ass and shouldn't require much adjustment once a correct setting is determined for a given track or situation.
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