Valve Noise - Should I be worried? (Links to vids inside) - Wrist Twisters
 
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post #1 of 10 Old 09-15-2015, 01:50 PM Thread Starter
Milites Gregarius
 
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Valve Noise - Should I be worried? (Links to vids inside)

Hey guys,

This is separate from the build thread, thought I'd post it up here. I'm getting a little bit of clatter at around 3000 RPM that's kinda worrying me. Not sure why I didn't notice it before. It's either a question of :

1. The bike has developed this recently;
2. It had been doing it for a while, but now that I'm getting used to the bike and not paying strict attention to either the forks or the brakes or whatever my latest mini-project was, I've got some "spare capacity" to notice these things, if you will.

Today, I went riding, and I did note that, for some reason, my earplugs didn't seem to filter out the clatter at all, so that it did seem worse than it actually is when taken in the context of the full normal engine noise. I can't really hear it past ~3500 RPM. Seems to be OK other than in that zone in the videos.

Idle, then choke on :

https://youtu.be/LQg7Eh6Aga0

Choke on, then back to idle :

https://youtu.be/1RhkGqnEiok

So - what do you think? Is it time for a valve adjustment...?

Thanks!

2006 Honda 919
2003 Honda RC51 (sold)
1989 Yamaha FZR400 w/ stock, YZF600, and 661cc engines (661 = YZF600 bottom end, FZR600 top end) (sold)
1986 Yamaha TZR250 (sold)
1989 Yamaha RZ350 (sold)
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post #2 of 10 Old 09-15-2015, 02:41 PM
(Quintus) Pilus Prior
 
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sounds like injector tick to me (common with the 919.) If you're really worried about the valves, give them a check!

if you love your motorcycle, set it free.. if it comes back and hits you.. you highsided
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post #3 of 10 Old 09-15-2015, 02:43 PM
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Here's what mine sounded like last summer ended up having a broken valve spring not to worry you... It took 16 weeks to get 16 springs (think they came from Japan in a rowboat). Hope it's not the case for you.

http://youtu.be/Uh7ILelZpuk

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post #4 of 10 Old 09-15-2015, 02:44 PM
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Quote:
Originally Posted by beefsalad View Post
sounds like injector tick to me (common with the 919.) If you're really worried about the valves, give them a check!
Hope this is all Bike had been sitting awhile right? Run some sea foam through her

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post #5 of 10 Old 09-15-2015, 04:27 PM Thread Starter
Milites Gregarius
 
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Oh God - no, it clearly isn't that, Spyder. Thanks for the vid - that poor thing does sound really sickly.

2006 Honda 919
2003 Honda RC51 (sold)
1989 Yamaha FZR400 w/ stock, YZF600, and 661cc engines (661 = YZF600 bottom end, FZR600 top end) (sold)
1986 Yamaha TZR250 (sold)
1989 Yamaha RZ350 (sold)
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post #6 of 10 Old 09-15-2015, 05:04 PM
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Quote:
Originally Posted by SilverJS View Post
Oh God - no, it clearly isn't that, Spyder. Thanks for the vid - that poor thing does sound really sickly.
She's all better now hope it's just injector noise
https://youtu.be/nJ085SSCzuc

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post #7 of 10 Old 09-16-2015, 05:30 PM Thread Starter
Milites Gregarius
 
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Quote:
Originally Posted by beefsalad View Post
sounds like injector tick to me (common with the 919.) If you're really worried about the valves, give them a check!
That's what I was hoping to hear. It's certainly nothing like in Spyder's video. I'm assuming this is therefore normal, and no need for further adjustment or action on my part? (The injectors, that is.)

2006 Honda 919
2003 Honda RC51 (sold)
1989 Yamaha FZR400 w/ stock, YZF600, and 661cc engines (661 = YZF600 bottom end, FZR600 top end) (sold)
1986 Yamaha TZR250 (sold)
1989 Yamaha RZ350 (sold)
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post #8 of 10 Old 09-16-2015, 07:00 PM
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Injector tick is normal...however not hearing it in person leaves a lot to be desired. Find a local 919 and see what theirs sound like. Or take my method of dealing with injector tick and get a louder exhaust

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post #9 of 10 Old 09-17-2015, 01:07 AM
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You could use a stethoscope to see if it's the injectors. Touch it to each injector and see if the noise is at the same rate and listen to the volume of the noise. Might be able to use a long screwdriver to the base of the ear and spot the location of the noise.
Mechanic's Stethoscope

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post #10 of 10 Old 09-17-2015, 06:41 PM Thread Starter
Milites Gregarius
 
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Had a closer look today. I could definitely hear the injectors more towards the back of the engine, but I'd say that what you're hearing in that video IS indeed the valve train. Depending on where I put my ear, I could hear the injectors and valves separately. At the choke RPM (2500-3000), the valves were louder. Once out of that band - either higher or lower - the valves noise seemed to disappear.

Not sure what this means, but there you have it...

2006 Honda 919
2003 Honda RC51 (sold)
1989 Yamaha FZR400 w/ stock, YZF600, and 661cc engines (661 = YZF600 bottom end, FZR600 top end) (sold)
1986 Yamaha TZR250 (sold)
1989 Yamaha RZ350 (sold)
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