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I have a Scott Sportster that came with Suntour NEX 4610 forks.
I've had it for about 10 years, and there has been the odd rattle/knock in the fork for about 2-3 years when riding up and down kerbs etc. I assumed it was going to need a full strip down to fix it, so never got around to it as I'm mainly riding on gravel tracks.
I've just had the bike upside down in the house to fit some new tyres, and noticed that on the underside of the forks it looks like there is a nut missing on the right side. I can see inside of the housing and there is threaded steel block which can be moved from side to side (assume that's the bottom of the spring assembly) The other (good) side of the fork looks like it has a threaded stud fitted with a flanged nut, rather than a bolt, so I'll dig out the manuals and get it fixed.
Thought this might be useful to somebody who has rattles/knocks on budget forks - I never thought to check right underneath.
What's the thoughts on servicing these type of forks - is it worth doing a strip down and rebuild?
Might be something useful in this thread.
https://singletrackmag.com/forum/topic/suntour-suspension-fork-rattle/
You’ve done well with those, my first set of budget spec Suntours lasted about 10 weeks.