Motorcycle clicking, clank sound

[Rusty07]

Hi I have a Honda cb125f 2017. When cold there is no noise but as soon as it warms up I hear a clicking, clanking sound.

 

I changed the clutch thinking it might be the clutch basket and a worn clutch/ basket but it's not that ( rides better with the new clutch  ) . There is oil in the bike never in my ownership ran empty! 

 

I  am the 3rd owner.

 

Sounds  like it is coming from the cylinder head area. Definitely not clutch area as when I put my ear there you can Definitely tell its coming from elsewhere. 

 

If someone could please help me figure it out I would appreciate it Thank you.

 

I can upload a video to youtube of the noise if needs be.

[Simon Davey]

I've no idea, but I'm following with interest.

 

However, is the sound the same at increased engine speeds, or does it change?

Is it constant, or intermittent?

Can you "feel" the sound if you put your hand on any (not burning hot) part of the engine?

 

[RideWithStyles]

Sim

Edited May 15, 2024 by RideWithStyles

[Rusty07]

I Hi thank you for the response. I bought the bike in December at 8500 miles. It is currently at 10002miles. I will upload a video to youtube and post the link to see what you think. You help is appreciated. The bike does work and runs fine but the noise is worrying.

 

https://youtu.be/dKh8u1T5q74?si=6RkxeiyOrQ6UvNa6

 

Thank you

 

[Nick the wanderer]

Hi, that's a tricky one something doesn't sound right. You could try using something like this to narrow it down. 

https://www.amazon.co.uk/Wress-Engine-Stethoscope-Professional-Automotive/dp/B0C81F1Z4L/ref=sr_1_5?dib=eyJ2IjoiMSJ9.q8mHxGszCpcwYKv3K3teA816ZUTwrnhR0ssw-IsHE1R8GgNryORTi_cSdR8agJetxhTPskHASrjrpyaxJ06B4zxtBVg5MwEDl_-rDi_v8NeS34x8V2BDz-WmgGOZmRx8adt30HJ6e4OGsPj5fbzQ8YbE2Xc2i

[Simon Davey]

After several replays of the video, I still have no idea.

I can hear the tappets quite nicely though.

I wish I knew the engine build, but it does sound like something like a cam chain is slacking/slapping a little.

 

 

[Rusty07]

4 hours ago, Simon Davey said:

After several replays of the video, I still have no idea.

I can hear the tappets quite nicely though.

I wish I knew the engine build, but it does sound like something like a cam chain is slacking/slapping a little.

 

 

Thank you for listening and trying to help.

 

You ideas and help is appreciated.

 The noise is definitely internal. Here is a video of the noise from a cold start up until it get warm( which is last 5 seconds of the video)

 

https://youtu.be/IBt2umrYpWQ?si=B81NL4U6QEGMsTb5

 

 

 

[rob m]

If I was a betting man, I'd be checking out the cam chain tensioner or the valve clearances.

 

Valve clearances are easy peasy to adjust, this might help:

 

 

[Tinkicker]

Concur.  It is very likely cam chain related. 

[Rusty07]

19 minutes ago, rob m said:

If I was a betting man, I'd be checking out the cam chain tensioner or the valve clearances.

 

Valve clearances are easy peasy to adjust, this might help:

 

 

Thank you I have ordered a Haynes manual and a feeler gauge. I'll keep you guys updated with the progress and tell you my finds once fixed so this post can help others.

 

I'll check clearance first then. Have a look at the cam chain tensioner 2nd.

 

Thank you for your help

[Mississippi Bullfrog]

I agree - it does sound like the timing chain. 

[Rusty07]

Hi everyone thank you all for your help. I adjusted the  tappets back to spec.(they was a little bit out). After adjustI started up the bike let it warm up. I still heard the noise, so I decided to have a look at the cam tensioner. The cam tensioner seems to be fine. The chain seems slack and  the teeth on the sprocket look worn and you can see a tiny bit of day light thru it. I tightened the tensioner a 1/4 turn and it has tighted up a bit of the slack but I  think it will need a new cam chain and cam sprocket.

 

Before 

 

 

 

After sound

 

 

 

So it has stopped the noise but. It's definitely worn. I'm guessing maybe the last ownership ran the oil low and starved the engine of oil and stretched the chain .

 

Anyways that is what the noise was and I know how to fix it now. Thank you all for your help. It has been much appreciated.

 

Edited March 13, 2024 by Rusty07
Spelling errors

[Simon Davey]

Excellent stuff, you must be relived it's not going to implode on itself.

 

[Rusty07]

1 hour ago, Simon Davey said:

Excellent stuff, you must be relived it's not going to implode on itself.

 

Yes I'm happy now not knowing the cause of a a sound which you know isnt normal (especially inside the engine). Can cause anxiety when riding far ahaha