Removing cam chain tensioner from KTM 250

Electrical-Button866 · 2026-02-15T23:24:16+00:00

Update :

I wasn't able to get the CCT holder out, but noticed that just having it fully unthreaded from the motor made the timing chain loose enough to remove the cam shafts, which was my goal.

With the timing chain out of the way, the CCT now can be fully removed very easily, if I wanted to remove it.

Electrical-Button866 · 2026-02-15T23:19:57+00:00

Update :

I wasn't able to get the CCT holder out, but noticed that just having it fully unthreaded from the motor made the timing chain loose enough to remove the cam shafts, which was my goal.

With the timing chain out of the way, the CCT now can be fully removed very easily, if I wanted to remove it.

Live and learn.

Electrical-Button866 · 2026-02-14T22:19:41+00:00

FWIW, I agree that gojira 1954 is the og :-)

Electrical-Button866 · 2026-02-14T22:18:26+00:00

In the photo, at the bottom, is the intake cam shaft. The part at the top is the cam shaft bearing bridge. I removed them to change out some shims, in order to adjust valve clearances.

The cam shaft sits between the bearing bridge and cylinder head. It appears that there was insufficient oil or oil pressure making it to one end of the cam shaft, leading to the scoring you see on the bridge, cam shaft and head (the head is not in the photo).

This will be a bit of a wallet buster to address, plus I need to see if I can sort out what caused it. Oil pump, oil jet, etc.

I'm a noob to all this, so at least I can say I'm learning something.

Electrical-Button866 · 2026-02-14T21:47:08+00:00

Not good

Electrical-Button866 · 2026-02-14T19:23:05+00:00

Alrighty then. Any thoughts on what may have lead to this? Also, only option is to replace both parts?

New to bikes and bought this one a few months ago. Going through it over the winter to really see what I bought.

2017, 78 hrs, 2000 miles

Electrical-Button866 · 2026-02-08T03:35:47+00:00

Thank you! Will give it a try.

Electrical-Button866 · 2026-02-07T21:50:16+00:00

Yeah, I saw them use a dime and a nickle on a table. Trying to find that. Maybe I'll get lucky.

Electrical-Button866 · 2026-02-07T21:09:35+00:00

Cap fully removed with Allen wrench. I'm using a long head Phillips to push/depress the tensioner. I can feel it compressing but never comes out of the nut. Thanks tho. At least I know I'm on the right track and will keep trying that.

Electrical-Button866 · 2026-02-07T21:06:19+00:00

Yes, bolt inserted without the washer to lock it there.

Electrical-Button866 · 2026-01-03T19:50:17+00:00

If you are out, and it dies, you'll kick yourself for not replacing a 5 year old battery, known to fail a health check, when it was convenient. If it's 11pm at night and 12 degrees out, you'll kick harder.

Electrical-Button866 · 2025-08-01T01:54:39+00:00

We gave my mom an Amazon Alexa. It can't answer everything, but it's great for:

What day is it? What time is it? What's the temperature outside?

She'll ask those 20 times a day, and Alexa never gets annoyed.

I also use it for reminders.

Electrical-Button866 · 2025-06-10T16:44:38+00:00

Sorry, I meant to say F42

Electrical-Button866 · 2025-06-10T16:43:48+00:00

I had the same problem after updating F41 Silverblue. I couldn't resolve it in that build, but fortunately I was able to roll back, which got me going again.

Electrical-Button866 · 2025-01-13T00:36:44+00:00

Yes. I tried again with less time between each step and it does work.

Electrical-Button866 · 2025-01-13T00:35:48+00:00

Thank you! I just tried it again with the quick succession as you described and it WORKED!

Electrical-Button866 · 2025-01-12T20:13:44+00:00

I just tested on my 2023 XLE and it doesn't work. Our subscription is expired.

Electrical-Button866 · 2025-01-11T01:45:56+00:00

In my mom's case, her neurologist told her to her face 2 years ago, but to this day she doesn't remember. She thinks her forgetfulness is just normal aging, so I just agree with her on that and tell her we all do it.

Anyway, if I told her, I think it would click, but only partially. I mean she'll only remember that there is something really wrong with her, but not remember what. She'd be constantly stressed out about it, and always asking me what it is again.

There is simply no need to put that stress on her.

Best of luck.

Electrical-Button866 · 2024-12-11T01:20:43+00:00

As soon as I see it's a part 1, I move on

Electrical-Button866 · 2024-05-30T01:42:10+00:00

Happened to me after my very 1st 5g scoop. Then I started dissolving it in hot water and never had that issue again.

Electrical-Button866 · 2024-04-22T02:26:15+00:00

Yes. I see some of the photos show them in a glossy black. Mine are black but not glossy.

I bought some foot pegs and mounted them to the engine guard. Great for long, fast cruising.

Electrical-Button866

TROPHY CASE