Marks on cylinder

[logogasgas]

I just bought a 2024 EC 300, and I'm am installing a new medium TSP head. When I took the original head off, I found this mark in the cylinder. the bike only has 1 hour 16min on it. ?????

 

[cbutler]

That doesn't look good, can you feel it?

 

[logogasgas]

That doesn't look good, can you feel it?

Barely with my fingernail towards the top of the cylinder.

 

[(F5)]

That sucks. Something has been posted out the transfer and not quite made it so been scraped up wall.

So what was it is the difficult question .

I'd check ring ends and seriously flush the bottom end.

A more conservative approach would be strip, but I wouldn't.

Then get barrel assessment it can hone for big piston.

 

[logogasgas]

That sucks. Something has been posted out the transfer and not quite made it so been scraped up wall.

So what was it is the difficult question .

I'd check ring ends and seriously flush the bottom end.

A more conservative approach would be strip, but I wouldn't.

Then get barrel assessment it can hone for big piston.

I've been told the nicaseal is not thick enough to hone.

 

[(F5)]

Now I'm not on my phone I see its exhaust not transfer. Not that it changes anything.

So it's either, debris from build. A bit of the ring or bearing cage. Or it got past the airfilter.

I mean the scrape won't bother it running, but it's like starting off with a ring on wear limit.

 

[logogasgas]

Now I'm not on my phone I see its exhaust not transfer. Not that it changes anything.

So it's either, debris from build. A bit of the ring or bearing cage. Or it got past the airfilter.

I mean the scrape won't bother it running, but it's like starting off with a ring on wear limit.

The dealership has it now and according to them it's still under warranty. So let's see if Gas Gas will make good.

 

[gasgasman]

Chinese cylinder?

 

[logogasgas]

Chinese cylinder?

Probably I heard ktm has been outsourcing to china on some of their parts. Just got a phone call from the dealer. They said it is a faulty piston. The coating on the piston was coming off, which caused the marks on the cylinder. Still don't know if gas gas is going to pay for it.

 

[gasgasman]

I don't think the piston coating can cause scratches. It's just teflon. I may be wrong though.

 

[logogasgas]

I don't think the piston coating can cause scratches. It's just teflon. I may be wrong though.

I'm not sure, but whatever it takes to get it covered. I've been told that KTM is hard to deal with on warranty work.

 

[(F5)]

Yeah I'm with him. Teflon won't cause a groove I'd bet. I'd say tip or ring peg fragment. The cylinder coating is Hella hard. But hope can warranty. KTM do have a reputation decades old of being difficult.
Good luck.

 

[logogasgas]

Well, I'm not sure whatever caused it, but kTM replaced all the top end. Runs great I'm happy with the outcome.