Noise! Can't get rid of it

Forum rules
Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
Holocaustto
Settled in member
Reactions:
Posts: 8
Joined: Thu Sep 06, 2012 8:12 pm
Noise! Can't get rid of it

Post by Holocaustto » Fri Sep 07, 2012 5:36 am

Hello!!
I came here, after many others places, to ask about an annoying sound my 91's Bandit 400V has.
A litle description and than listen by yourseves. It does not match the rpms, so there aint the valves (I guess). It's not the camchain either (I checked). Im guessing oil pressure problem... Im changing the oil pump, just in case.

sec 12, it starts :shock:
sec 48, it's there from the start.
http://youtu.be/OrTBZFfZS50

Any contribution??
Thanks!!! :mrgreen:

H D
Settled in member
Reactions:
Posts: 54
Joined: Thu Aug 11, 2011 1:53 am
Bike owned: Derbi Senda
Re: Noise! Can't get rid of it

Post by H D » Fri Sep 07, 2012 10:20 am

have you checked all of the nuts or bolts are tight on your exhaust headers?

Holocaustto
Settled in member
Reactions:
Posts: 8
Joined: Thu Sep 06, 2012 8:12 pm
Re: Noise! Can't get rid of it

Post by Holocaustto » Fri Sep 07, 2012 4:27 pm

I wouldn't say something is lose...
THe sound isn't there when the bike starts (cold). After a few mins it begins and after a good ride, when the bike gets a nice tº it fades away. Funny, huh?

H D
Settled in member
Reactions:
Posts: 54
Joined: Thu Aug 11, 2011 1:53 am
Bike owned: Derbi Senda
Re: Noise! Can't get rid of it

Post by H D » Fri Sep 07, 2012 8:35 pm

Hmm, does sound odd then. Obviously it's hard without being there but it definitely sounds like something rattling/knocking. Would say its less likely for it to be non-engine related if it disappears when the bike gets warm. Mine sounds like it knocks when its cold as well but not that bad :P

Put a screwdriver to your ear and against different points on the engine and see if the noise gets any louder.

Holocaustto
Settled in member
Reactions:
Posts: 8
Joined: Thu Sep 06, 2012 8:12 pm
Re: Noise! Can't get rid of it

Post by Holocaustto » Sat Sep 22, 2012 4:32 am

Hello!
We checked and it definitely is in the Camshaft. The cam chain?? I tried to change it once, but mine is of 120 links! I just can find the 118 links part. Any idea why mine is 120???? :/ (Keep in mind it's a VC)

User avatar
thunderace
Site Supporter
Site Supporter
Reactions:
Posts: 2867
Joined: Fri Sep 10, 2010 9:03 pm
Bike owned: R6, YZF600R
Location: Blackburn, Lancs.
Re: Noise! Can't get rid of it

Post by thunderace » Sat Sep 22, 2012 8:10 am

It may just be the tensioner that needs replacing :peace:
Conventional wisdom says to know your limits. To know your limits you need to find them first. Finding your limits generally involves getting in over your head and hoping you live long enough to benefit from the experience. That's the fun part.

Holocaustto
Settled in member
Reactions:
Posts: 8
Joined: Thu Sep 06, 2012 8:12 pm
Re: Noise! Can't get rid of it

Post by Holocaustto » Sat Sep 22, 2012 6:14 pm

Nope, the tensioner is fine! I actually bought one and was just as good as the one on the bike...

Doubleyoupee
Settled in member
Reactions:
Posts: 4
Joined: Mon Jan 21, 2013 3:18 pm
Re: Noise! Can't get rid of it

Post by Doubleyoupee » Mon Jan 21, 2013 3:50 pm

Wow I have a very similar sound to my '92 GSF400, but it's not nearly as loud as yours.
I recorded it:
https://dl.dropbox.com/u/22072961/MF/ratel.wav

I also immediately checked the cam chain but it looked fine (very tight).
I went to the garage and the let a mechanic listen and he immediately said it's your cam chain tensioner.

I went ahead and bought a manual cam chain tensioner and put it in. The stock automatic tensioner seemed fine to me. I'm still in the process of rebuilding.

Do you know what the problem was for you?
Oh btw, your bandit doesn't sound good to me. Sounds like it's running on only 3 cylinders.

H D
Settled in member
Reactions:
Posts: 54
Joined: Thu Aug 11, 2011 1:53 am
Bike owned: Derbi Senda
Re: Noise! Can't get rid of it

Post by H D » Tue Jan 22, 2013 2:21 pm

My cam chain tensioner went a few weeks ago and sounded exactly the same. All sorted now.

Mine did it all of the time, hot and cold though.

Doubleyoupee
Settled in member
Reactions:
Posts: 4
Joined: Mon Jan 21, 2013 3:18 pm
Re: Noise! Can't get rid of it

Post by Doubleyoupee » Tue Jan 22, 2013 9:31 pm

H D wrote:My cam chain tensioner went a few weeks ago and sounded exactly the same. All sorted now.

Mine did it all of the time, hot and cold though.
So what exactly what do you mean "it went"?
I haven't tested the my new manual cam chain yet, but the old automatic one looked fine. When I put a screwdriver in and wind it back you can feel there's still plenty of resistance


Post Reply