"BUZZING" while riding - NOTHING at idle

[rozbabbo1100_imp]

so I have about 5k on my 14 cb1100 and I noticed a buzzing sound now under load; riding on the highway, in all gears at speed...however goes away at idle and when clutch not engaged. it doesn't get louder or softer on acceleration and makes the sound when the bike is slightly cold and when fully warmed up.

I have changed the oil myself using Honda recommended oil and all levels are where they should be.

I initially thought it might be the factory tail light assy or lic plate bracket vibrating however I have confirmed this is not the case as all is tight.

should I be worried?

thanks

[the Ferret]

Some have noticed connections in the headlight causing a buzzing sound as they rattle against the housing.

here is one thread about it.

http://cb1100forum.com/forum/showthread....ight+shell

Popgun has some good pics of the issue

[Bheezy27403_imp]

Chain?

[SpamJ_imp]

Something in the tool holder?

[rozbabbo1100_imp]

thanks. im not sure its the headlight as the sound seems to be coming from below me. I have a modular helmet so its fully open on the bottom. i look up and it goes away and look all the way down and it goes way unless I have my visor open. also, as sound resonates off your legs I can "widen" my knees as the sound gets louder. it is def coming from the engine but im wondering if its the clutch?

I will def check the chain. I have not adjusted it since factory spec. could very well be the issue as I know chains can start making all kinds of racket if loose by only a small amount.

as I have the standard model I don't have tool kit, however the storage bin under the seat currently has an AC plug for accessories.

im about to call the dealer but cannot imagine an oil change would have caused this.

I went 1200 miles before the first oil change when the dealer said 1000. I then went 2000 for my next and another 2500 for the next. I used the same oil as recommend from the dealer and I didn't notice the sound until just after my last oil change.

I live in western ny and my longest single day trip was 830 miles round trip going to Mid Ohio Raceway for Vintage Motorcycle Days.

This is very strange as everything is still "new-ish".

thanks for the feedback

[Lord Popgun]

You really need to check in the headlight shell. The noise echos around and sounds like its coming from everywhere.

[Jeya_imp]

thanks. im not sure its the headlight as the sound seems to be coming from below me. I have a modular helmet so its fully open on the bottom. i look up and it goes away and look all the way down and it goes way unless I have my visor open. also, as sound resonates off your legs I can "widen" my knees as the sound gets louder. it is def coming from the engine but im wondering if its the clutch?

I will def check the chain. I have not adjusted it since factory spec. could very well be the issue as I know chains can start making all kinds of racket if loose by only a small amount.

as I have the standard model I don't have tool kit, however the storage bin under the seat currently has an AC plug for accessories.

im about to call the dealer but cannot imagine an oil change would have caused this.

I went 1200 miles before the first oil change when the dealer said 1000. I then went 2000 for my next and another 2500 for the next. I used the same oil as recommend from the dealer and I didn't notice the sound until just after my last oil change.

I live in western ny and my longest single day trip was 830 miles round trip going to Mid Ohio Raceway for Vintage Motorcycle Days.

This is very strange as everything is still "new-ish".

thanks for the feedback

I know what i am about to say might sound strange to some but i notice that buzzing sound also. I rode around and managed to find out that it happens when i grip my tank fully with my tighs. Its the resonance from the engine that makes you instantly hear the buzzing. Again, i have confirmed this on my bike. Idle or not, as long as my tighs grip fully, i will hear the buzz. But, with this bike being so perfectly put together, i am able to ignore this. I ride a 2017 RS

[postoak_imp]

What do you mean when you say it is there when the bike is slightly cold? Is it not there when you first start out, then appears when the bike has warmed a bit?

[rozbabbo1100_imp]

What do you mean when you say it is there when the bike is slightly cold? Is it not there when you first start out, then appears when the bike has warmed a bit?

I suppose I could have worded that differently. slightly cold as in when you first fire it up, wait a minute, then hop on it and take off. its warm...but not warmed up.

[dsan1964_imp]

I am sure that the buzz comes from the headlight bucket. I have reached down grabbed the headlight and it stops when you hold it tight. It has been on my to do list.


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