Klunk/ metal sound
Thread Starter
Senior Member
Superstock
Joined: Oct 2008
Posts: 388
From: Muskego,WI
Klunk/ metal sound
So today I took the bike out for a short ride... when crusing at 3k-3.5k, i get a noticable metal klunkly sound, kind of a metal thud sound...
Any ideas on what it could be? The bike has stock CCT's in it at 20k, I have APE's going in Saturday... could that be the noise?
Any help would be great....
Any ideas on what it could be? The bike has stock CCT's in it at 20k, I have APE's going in Saturday... could that be the noise?
Any help would be great....
Out of my mind, back in 5
MotoGP
Joined: Nov 2006
Posts: 6,109
From: Skurup, Sweden
Trust me...That's not the CCT's... That sounds like gravel in a washing machine and once it starts it doesn't stop at any rev's until the bike is toast or repaired...
Doesn't mean it's a bad idea with a CCT change...
Noise like that can be many things... And not all logical... We have had people with a loose drive chain, carb backfire and many other things give that same description as you...
Find out more... The rpm's isn't info enough to figure it out...
Doesn't mean it's a bad idea with a CCT change...
Noise like that can be many things... And not all logical... We have had people with a loose drive chain, carb backfire and many other things give that same description as you...
Find out more... The rpm's isn't info enough to figure it out...
Thread Starter
Senior Member
Superstock
Joined: Oct 2008
Posts: 388
From: Muskego,WI
i noticed I get the sound when I fill with gas... This is the second time I heard it when I filled with gas... when I rode it agian after gas sat in the tank, I did not hear/feel it
Thread Starter
Senior Member
Superstock
Joined: Oct 2008
Posts: 388
From: Muskego,WI
UPDATE MORE DETAIL
So i had a good ride today in 35 degree weather.
More details on the noise/feeling....
when cruising in the 3 - 4K range I feel a pulse klanking noise from under the gas tank area. I can feel the bike stumble ever so slightly. I then roll on the throttle and it is fine during accleration, but when cruising it reappears.
Is this gas combusting in the carb? Any help would be great.
More details on the noise/feeling....
when cruising in the 3 - 4K range I feel a pulse klanking noise from under the gas tank area. I can feel the bike stumble ever so slightly. I then roll on the throttle and it is fine during accleration, but when cruising it reappears.
Is this gas combusting in the carb? Any help would be great.
ole dirty bastard
SuperSport
Joined: Jul 2004
Posts: 976
From: my house
kinda sounds like it may be spitting back through the carbs.
any changes or mods?
when stock mine was barely rideable.
it would spit clunk and stall on me all the time.
i installed a dynojet kit and all that and the surging idle went away.
any changes or mods?
when stock mine was barely rideable.
it would spit clunk and stall on me all the time.
i installed a dynojet kit and all that and the surging idle went away.
Senior Member
SuperSport
Joined: Aug 2007
Posts: 599
From: Eagle, ID.
I have a similar sound, but mine happens when the bike is cold and it is coming from the front cylinder. It sounds like there is slack in the cam chain. Erring on the side of caution, I have decided to replace the CCT's. I would recommend doing the same, it is cheap insurance.
Good luck.
Good luck.
Senior Member
SuperSport
Joined: Aug 2007
Posts: 599
From: Eagle, ID.
Honda has Hawxter stated his bike would barely run with the backfiring of the carbs. Skoshere stated his problem happens at 3-4K rpms, so if it were the carbs the problem would cover a wider spectrum of issues not just in that specific rpm range.
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