just watched this on YouTube,very interesting??

 

Yes very interesting indeed, certainly worth trying.

I'm always a bit cynical about Youtube claims, but if I still had my 1000F, I'd give it a go.

 

I've seen that video a couple of times and it totally makes sense.
Why else would it stop working???
Unless, the spring lost it's tension/broke or clogged, that prevented the CCT from moving.

 

Makes sense to me. If the plunger gets bogged down it won't do much good. I checked mine by hand per the manual and it seemed fine. Interestingly, after this video, the poster made another video about a blown engine due to cam chain failure caused by a wandering bolt. Modification carries risks

As a practical approach, it's not a huge deal to remove the cct, so if it's questionable, it probably makes sense to pull it and make sure it's behaving properly. Worthwhile to check cams and journals while you're at it, then chase with a valve adjustment

Also, my gut tells me that the bowl doesn't seal perfectly, so if the bike sits a lot I'd expect it to eventually drain completely. If that happens any debris in the oil could be left behind. It would also explain why so many of these bikes rattle like heck for a couple minutes when started. It's super unnerving if you don't expect it. I know most people say it goes away once the bike is warm - I wonder if temp actually has no effect, but it's just the time it takes for that piston to build hydraulic pressure

 

You gotta keep good slick oil in them. I don't know what the previous owner was putting it mine. It had 10,000 mi on it when I get it and the CCT went at 25k. I replace it and now have 70k on it with no rattle at all, even when cold. Gotta keep proper MC oil in them and replace it often (3,000 to 3,500mi).