24 ktm 350 metal pieces

Definitely not normal IMO.

I agree, not normal….I would probably pull the clutch cover & oil pump cover to inspect….

Just look for anything out  of the ordinary…possible piece of case or something rubbing on a case…it’s aluminum, so its not gears or forks….have you pulled the bottom drain bolt? The one you don’t normally pull….

Your clue is in the magnetism of those chucks. If that’s non-ferrous metal then you’re looking at aluminum bits. It’s possible that is just remnants from the engine case casting. The only aluminum engine components are the clutch plate, clutch basket, shift drum and piston.

The transmission is made entirely of ferrous metals. It’s not uncommon for casting bits to make there way loose over time.

If you see ferrous metal then I would be worried.

Lay it on its side and pull the side cover.

My 2016 350 had these metal bits every oil change I did. I sold the bike at 120h and never had an engine problem. I though it was normal 🤷‍♂️

If you do not find anything there, you might consider taking off the fuel tank, washing the bike thoroughly and removing the cam cover.
You can take a look down around the cam-chain area to see if the chain is eating into anything and look for signs of metal around the cam journals.

If it were a chain problem, you would most likely hear a lot of noise and it's unlikely for a smoked cam journal to live through 27 hours.

I have 17 hours on my MC350F now.  It produced less metal than your photo at the first oil change (1.1 hours) and then a pieces that were almost too small to see in the screen when I changed it again just before the four hour mark.   I have not seen any more in the screen since.

There is very little that's aluminum that moves.  My guess is it's left over crap from manufacturing.  Even the clutch basket is steel on these.  If it were me I'd pull the side covers to make sure nothing is obviously wrong and chewing up the cases, then assuming all is well just run it and let the filter do it's job.

Not sure if it’s the same design on the 24 as the 19 but more than a few people with my gen of 350 had an issue with the left handed primary gear nut backing off and rubbing against the case and then you see aluminum shavings in the oil.

That is way more debris than I've seen on a 23 or 24 model. You won't know for sure until you do a teardown. Here's a few good threads to read.

https://www.thumpertalk.com/forums/topic/1479911-23-fx-350-metal-in-oil/

https://www.thumpertalk.com/forums/topic/1385911-2021-ktm-250-sxf-engine-issues/

My 19 had the same. Did top end at 90 hrs. Sold it at 140 hrs. Zero issues.

I have 44 hours on my ‘23 350 SX and have never had any metal savings at all on my oil screen. I would definitely want to pull the clutch cover and check things out just to be sure there’s nothing obviously wrong. 

I had my primary drive nut back off just like the picture from orange juice 

I also had my freewheel gear pressed to tightly and it would rub the case when starting the bike. 

https://www.vitalmx.com/forums/tech-helprace-shop/ktm-freewheel-rubbing-case

The tech at my local shop says he sees the freewheel gear bearing improperly installed from the factory often enough that it wasn't odd to him that it was like that 

If you recently stripped the drain bolt threads or some threads broke off inside the cases…

I have a 16 350 and see the same type of shavings too...I got a hold of a KTM tech at the race shop who told me he thought it was the side cover near the clutch basket. Pull that cover - no rubbing of any kind there.... Bike runs great. 

Yep... strange. But I'd get the chunks out of there. I took a clear hose - small diameter - l Put some duct tape over the end of a shop vac to cover the end  - poked a hole in the tape and slide the clear hose into it... Put bike on it's side - sucked out the stuff inside the motor using that clear hose through that hole the screen you show goes into. Used a flashlight to see into the engine as I did it. 

my 23 did the same thing around 20 hours. It was the starter gear behind the flywheel. It shifted on the one way bearing and self clearanced itself on the case. pull the flywheel and you'll see it. seat the gear a bit deeper and your golden. 

I would definitely pull the clutch side cover and take a look also maybe pull the valve cover. If you are getting remotely close to that amount of material every oil change id say that adds up to a fair bit of metal from something. 

I have 260 hours on my 350 and I have maybe had a couple of the smallest pieces you have over the life of it. Lots of clutch bits sometimes but that's it.  

I will echo that is a concerning amount of metal for several oil changes. 

I had a clutch bolt back out on my 22 350 that rubbed on the cover.  I still have shavings that look exactly like that.  Once the cover was pulled you could see where it was rubbing.

You got a trip over the bars in your future lol

Let us know what you find, it's always so much more helpful for others when a resolution is posted.

I'd start at the clutch basket, have had similar debris show up with a smoked basket. 

If you're talking about the basket itself, I'm pretty sure it has the steel basket, so that wouldn't apply here.