Tapping sound from my VFR. . .

So I got my VFR in October and few months ago, this spring, I started
hearing a strange clicking or tapping sound coming from the motor. I
only hear it at idle and it usually comes and goes in irregular
intervals, also I think I may be able to feel it in the right peg. I
dont know what it is but it doesnt sound like anything Ive heard before
like a loose chain or CCT. I also havent noticed any other side effects
besides the noise. I thought it may be something to do with the valves
so i went to my local shop to find out how much a valve adjust would be
and while I was there I asked a mechanic to listen to it to see what he
thought. They said that the sound was coming from low in the engine and
was too slow a tap to be valves, his first reaction was that it was a
bad rod or maybe a balancer shaft, but wouldnt either of those issues
cause noise and/or vibration at all rev ranges, not just at idle?
Ideas?

John
--
'03 VFR800F-I
'93 CBR600F2(grenaded)
'85 VF500F(cursed/destroyed)
ICQ# 37620258
Boynton Beach, Florida

"Oh, Mohammed," God said, "hadst thou not been, I would not have
created the sky." - The Koran
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I have heard of some "flap" on later model VFR's that makes a bit of a racket.
Something to do with your anti-pollution system..
Anyone else?
*****************************************
Steve "Spider" Enfield
87 VFR 750
Sydney, Australia
www.ozvfr.net
FIGJAM
:-)
----- Original Message -----
From: John
To: vfr@xxxxxx
Sent: Thursday, July 05, 2007 12:38 AM
Subject: Tapping sound from my VFR. . .


So I got my VFR in October and few months ago, this spring, I started hearing a strange clicking or tapping sound coming from the motor. I only hear it at idle and it usually comes and goes in irregular intervals, also I think I may be able to feel it in the right peg. I dont know what it is but it doesnt sound like anything Ive heard before like a loose chain or CCT. I also havent noticed any other side effects besides the noise. I thought it may be something to do with the valves so i went to my local shop to find out how much a valve adjust would be and while I was there I asked a mechanic to listen to it to see what he thought. They said that the sound was coming from low in the engine and was too slow a tap to be valves, his first reaction was that it was a bad rod or maybe a balancer shaft, but wouldnt either of those issues cause noise and/or vibration at all rev ranges, not just at idle? Ideas?

John
--
'03 VFR800F-I
'93 CBR600F2(grenaded)
'85 VF500F(cursed/destroyed)
ICQ# 37620258
Boynton Beach, Florida


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From:
There's a flapper valve in the airbox that opens and closes at certain rpm,
it can be disabled with no real ill effects.

The noise may be coming from the cam chain tensioners? I have no idea what
these are (lol) but I do know they cause problems for Vtecs.

--
Murray

'It's a tour, not a race... but don't get in my way while I'm touring!'

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Subject: Re: [ozvfr] Re: Tapping sound from my VFR. . .


Probably not the Pair valve, the pair valve made a metallic strumming
sound under throttle which disappeared with cleaning the one reed that
was gummed stuck open.

On my previous VTec I used to hear what sort of sounded like a loud
popping / thropping sound that was most noticeable when rolling on the
throttle from rest that was loudest ( very ) when the motor was hot.

When I reported under warranty it to Honda SCM Lane Cove they
mentioned all VTec's do it and said they quietened mine by lubing, it
was quieter for a while but got progressively noisy again so didn't
worry about it.

This seemed to be normal on VTec's as Fabo's used to make the same
sound, this came back to the flapper in the airbox.

My Gen 5 doesn't seem to have the same noise or rather if it does it
is not loud enough for me to worry about it.

JohnS

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----- Original Message -----
From: "Vee4"


Tell him to drain the oil and look for metal particles in the bottom of the
pan. If found, this is always a bad sign.
Piston slap is easier to hear at idle but it will be "at speed". So will a
rod. Slap is higher pitched than a rod which can be more of a knocking that
gets worse as the engine is run up.
Balancer will be at half speed like cam noise and depending on what's loose
may only appear at idle.
Find a mechanic who knows how to use a stethoscope or screw driver radar

Cheers
Steve
http://www.vf750fd.com/

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I am forwarding mails from the Australian VFR list to the Big list, as I
posted the question on the Oz list.
And that was due in part to try and help out, because of the lack of
responses.
As the Aust list guys reply only on the Ozvfr list, I then cut and paste or
forward to the "Big list".
Hope some of it is helpful, and it has VFR content...
Spider
PS:
John, bit of a Red Dragon fan ehh?
*****************************************
Steve "Spider" Enfield
87 VFR 750
Sydney, Australia
www.ozvfr.net
FIGJAM
:-)
----- Original Message -----
From: "JES_VFR"
To: "Steve "Spider" Enfield"
Sent: Friday, July 06, 2007 1:29 AM
Subject: Re: Tapping sound from my VFR. . .


> At 01:17 AM 7/5/2007, you wrote:
>
>>Subject: Re: [ozvfr] Re: Tapping sound from my VFR. . .
>>
>>
>> Probably not the Pair valve, the pair valve made a metallic strumming
>> sound under throttle which disappeared with cleaning the one reed that
>> was gummed stuck open.
>>
>> On my previous VTec I used to hear what sort of sounded like a loud
>> popping / thropping sound that was most noticeable when rolling on the
>> throttle from rest that was loudest ( very ) when the motor was hot.
>>
>> When I reported under warranty it to Honda SCM Lane Cove they
>> mentioned all VTec's do it and said they quietened mine by lubing, it
>> was quieter for a while but got progressively noisy again so didn't
>> worry about it.
>>
>> This seemed to be normal on VTec's as Fabo's used to make the same
>> sound, this came back to the flapper in the airbox.
>>
>> My Gen 5 doesn't seem to have the same noise or rather if it does it
>> is not loud enough for me to worry about it.
>>
>> JohnS
>>
>
> Okay who the heck is that? cause its not me, I'm don't have anything to do
> with the dark side.
>
>
>
> JohnS
> A Dragon Ascending
> "Forging my body in the Fires of my Will"
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Funny but this fella is on the US based list and is getting more help and
flack from you blokes, been forwarding the mails....
Spied
----- Original Message -----
From: "Robert Ma"
To:
Sent: Friday, July 06, 2007 11:07 AM
Subject: Re: [ozvfr] Re: Tapping sound from my VFR. . .


> >
>> This blokes sig line says he's not having a lot of luck with bikes.
>> Things that make you go hmmmm....
>
>
> Do you suppose it has anything to do with his faulty anti-pollution
> mechanism? ;P
>
> The VF500s were a bit iffy in the OEM state... but with a minor oil to the
> redirection of oil, it was as reliable as any other Honda V4 out there
> (Smithy's, Alan's, and now Lynelle's VF500 has this mod and purrs like a
> kitten - no this is not the start of a pussycat thread).
>
> Never really was a huge fan of the CBR600... probably because by that
> stage
> I was well and truly smitten (not kitten) with the VFR750!!!
>
> And as for his last choice... well it ain't a VFR - it's got cam chains in
> it!!! ;P
>
> RDM
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