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Rocker arm and valve problem

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Old 03-27-2021, 11:53 AM
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Default Rocker arm and valve problem
Hi

My customer arrived with knocking engine problem.

I took out rockerbox covers and on rear cylinder i noticed that rocker arm is not situated well on exhaust valve.

Any ideas what could couse this problem?

touring 103” 2014



 
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Old 03-27-2021, 12:31 PM
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Can't help you with the rocker arm geometry, but have a look around my website... might be just what you need to cure the noise

John @ Rockout

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Old 03-27-2021, 03:46 PM
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You have "customers" and you don't know where to start?

I'd have a look to see if the valve stem is bent.
 
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Old 03-27-2021, 05:24 PM
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Originally Posted by Nomadmax
You have "customers" and you don't know where to start?

I'd have a look to see if the valve stem is bent.

 
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Old 03-27-2021, 06:12 PM
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Originally Posted by Nomadmax
You have "customers" and you don't know where to start?

I'd have a look to see if the valve stem is bent.
hhhhmmmmmm I didn't ask for help)) , I know what to do and how repair it. I just ask about possible reason. what could make this? exhaust valve is 100% bented.
 
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Old 03-27-2021, 07:55 PM
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Originally Posted by seba6250
hhhhmmmmmm I didn't ask for help)) , I know what to do and how repair it. I just ask about possible reason. what could make this? exhaust valve is 100% bented.
I'm guessing English isn't your first language so I'll be nice. I'd investigate by pulling the head and the valve. It looks like it may have hit the piston and bent. That's as far as I can go without actually making you "my customer".

Tomorrow's basic 4 stroke engine lesson will include timing and interference.
 
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Old 03-28-2021, 10:05 AM
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Originally Posted by seba6250
hhhhmmmmmm I didn't ask for help)) , I know what to do and how repair it. I just ask about possible reason. what could make this? exhaust valve is 100% bented.
99.9% of the cause for a bent valve is that the valve made contact with the piston; that would be my guess. Pull head and send a picture of the piston top.
 
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Old 03-28-2021, 11:57 AM
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Reason #17 ill never buy a used bike again. O.p. ,you posted a thread with pictures of a problem and a question at the end. I just looked in Websters and that was the very definition of "asking for help" hhhmmmm. Lol.
 
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Old 03-28-2021, 01:59 PM
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Man... Sometimes you guys jump way to quick.... Maybe this guy in Europe is just trying to build a business... Things are not the same all around the world.. Give him a break and help him... Don't ridicule, we were all there at one time or another....

I'll have to say over revved the motor and valve to piston contact.. That looks pretty severe....
 
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Old 03-28-2021, 03:49 PM
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Originally Posted by 98hotrodfatboy
Man... Sometimes you guys jump way to quick.... Maybe this guy in Europe is just trying to build a business... Things are not the same all around the world.. Give him a break and help him... Don't ridicule, we were all there at one time or another....

I'll have to say over revved the motor and valve to piston contact.. That looks pretty severe....
You're right of course.

That said, The most ethical way to learn something is on your own machine or for friend for no money. I'd help him but he clearly said he knows what the problem is, how to fix it and didn't ask for help in the first place. No matter where you are in the world, when you need help, all you really need to know are two things; who to ask for help and how to ask for it.

You're right about my attitude as well. From here on out when someone asks "Any ideas what could couse this problem?" sic, I'll just say "yes"
 
Last edited by Campy Roadie; 03-28-2021 at 03:58 PM.
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