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Discussion Starter #1
Hi guys.
I bought my new Z650 thanks to this forum and now I hope that this forum will help to fix my problem.
I rode now for 800 km more or less and now I am hearing a clicking noise coming from the engine area. It is a metallic noise, very similar to the throttle "click" noise, but it is a little different.
This clicking noise is always there, happening 20 times more or less per minute. Other info:
- bike turned on
- throttle off or on (all situations)
- bike stopped (with engine turned on) or running
- speed from zero to xxx (when I am riding faster the wind noise covers the clicking noise)
- engine warm or cold
- eco mode on
- in neutral gear....no clicking noise! Clicking noise is there on 1st, 2nd, 3rd gear, etc

I brought the bike to my Kawasaki Official dealer and he said that this noise is normal and that it comes from the Intake Air Temperature Sensor. I cannot believe that every Z650 every 3-4-5 seconds make this noise that you can hear from 20-30 meters far.
Anyhow experiencing the same issue?
Thanks a lot guys!
 

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Discussion Starter #3
Thank you. Unfortunately the noise should be different because I hear it even at zero km/h every 3 or 5 to let's say maximum 10 seconds. So I think that all components connected to the "moving" of the bike are not involved, like throttle or chain. Anyhow the chain is ok.
I was thinking about a solenoid or relays matter.
 

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It could be the slipper clutch from improper adjustment. Check your manual pages 118-119, and follow the instructions on checking free play. There could be just enough tension that triggers the slipper to engage randomly. That would be the clicking noise you hear and only while in gear.
 

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Discussion Starter #6
Thank you again. I checked the slipper clutch and everything is ok.
I am bringing the bike to the dealer next week since I reached 1000 km.
Anyhow I noticed one thing. During the last 3 weeks here in Italy we had hot weather, around 38 C (100 F). The clicking noise was always there. Now the weather temperature is around 25 C (77 F) and the noise has disappeared!!! I just here that clicking noise (and perhaps it is not the same noise since may hears now are listening to everything) when I release the throttle.
Perhaps the dealer was right when he told me that this is the Intake air temperature sensor, that works much more often when the outside temperature is very high is order to check the oxygen.
It should be interesting to know if anybody is riding this bike in hot climate.
Thank you again guys.

Ps. Tremonte, now you are well know here in Italy too! Small smart big guy!
 

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FYI I live in Southern California and ride in 100°F degree weather at night and 118°F during the day but I've never heard a weird noise except when my chain was loose. Hope everything gets sorted out, I would take it in because it's still under warranty.
 

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Discussion Starter #8
Hi. I brought the bike to another dealer and unfortunately this clicking noise has no solution. The dealer said that it is a normal noise.
I found a video on YouTube where a guy shows exactly the same noise in his Z300.


Is this click click normal?

Thanks.
 

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Ok, his bike was in neutral, where you say yours doesn't do it in neutral. Does the bike do it when you are holding a constant throttle? Or only when you are on and off like he was doing? Mine does not make that sound. The one difference, I have deleted the emissions components from my bike... SHHH!!! So that may be all it is, and could actually be normal.
 

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Discussion Starter #10
I am getting mad.

Now I am sure that:
- if the weather is hot: noise comes when throttle is constant (but it does not come while in Neutral if throttle is constant), on or off. So when it is hot I have always this noise.
- if weather is not hot: noise comes just when I am releasing the throttle or accelerating (no noise when throttle is constant). I can say that when I release the throttle I always hear the noise, when I am opening the throttle I hear the noise few times. So when it is not hot I have this noise always when releasing the throttle and sometimes when opening it.

Question: I am from Italy and since the Kawasaki Dealer said that this noise comes from the Intake Air Temperature Sensor (known as IAT), now I am thinking that perhaps this sensor is not installed in U.S.A.
 

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I would get a record of you taking it to the dealer, and them telling you it's normal. Then, if anything does fail, you have proof it was reported.
 

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I just bought my Z650 last weekend so I only have about 150 km on it and I have also heard the click noise that some people are talking about. I've really only noticed it when I let off the throttle. I haven't mounted my GoPro on the bike yet, but I think I will do that this weekend and see if I can capture the noise when it happens.
 

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I bought my Z June and after 200 miles my bike developed that clicking noise only on deceleration. After 400 miles it was happening on both deceleration and acceleration. When I brought it to the dealer for the first service the tech explained to me that the chain on this bike is very stiff for some reason, possibly the sealed o ring and they have a tendency to stretch very quickly. Full service reveled no engine problems and tightening the chain solved the problem completely. My bike now has close to 2000 miles and the sound has never returned.
 

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Had a rattle from center of the bike when I was decelerating. Found chain was loose, adjusted the chain and that rattle is gone. Now I hear a rotational clicking noise from the rear axle, I don't know if it was there before and the first rattle was covering it. I checked chain adjustment and its within spec, checked alignment 2 ways and the noise will not go away, 400 miles on the bike , help please
 

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Had a rattle from center of the bike when I was decelerating. Found chain was loose, adjusted the chain and that rattle is gone. Now I hear a rotational clicking noise from the rear axle, I don't know if it was there before and the first rattle was covering it. I checked chain adjustment and its within spec, checked alignment 2 ways and the noise will not go away, 400 miles on the bike , help please
Are you able to put your bike on a rear stand and rotate the tire? If you are able to put it up on a rear stand, place one hand on the top of the tire and one hand on the bottom of the tire and try to move it or wobble it side to side. It shouldn't, but if it does move a bit, there could be an issue with your rear axle bearings.

I noticed a rotational clicking noise on my last bike about a week after a tightened the chain. I didn't realize it at the time, but when I tightened the chain I didn't get the alignment correct which caused me to cook the bearings on one side of the rear axle which was what caused all the clicking noises.
 

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Discussion Starter #16
Hi guys.
The chain in my case is not conencted to the noise, because this clicking noise is there even if the bike has stopped (with engine on obviously).
1) The noise is always there when I release the clutch during deceleration:
- 6th gear, clutch, 5th gear, release clutch and the clicking noise comes
- 5th gear, clutch, 4th gear, release clutch and the clicking noise comes
- 4th gear, clutch, 3th gear, release clutch and the clicking noise comes
- ...and so on...

2) The noise is always there when I release the clutch during acceleration:
- 1st gear, clutch, 2nd gear, release clutch and the clicking noise comes
- 2nd gear, clutch, 3rd gear, release clutch and the clicking noise comes
- 3rd gear, clutch, 4th gear, release clutch and the clicking noise comes
- ...and so on...

When the weather (the weather, not the bike temperature) is very hot I hear the noise also when:
- bike is in neutral, release throttle from on to off.

Sometimes I hear a double click ("click click").

For sure when the WEATHER is hot the noise comes more often.

I am going to post a video...it is not so easy to make it! But the noise is the same of the one on the video I posted in previous posts.

Bye!
 

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That would be a trip to the dealer. They can't keep brushing this off as normal. You should demand they do something about it. This isn't a $20 toy you bought. They should honor their warranty. Where in the service manual does it state that it is a normal noise. Sounds like they are being lazy and hoping that you will eventually let it go.
 

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They haven't looked at it yet , I adjusted the chain and then it sounded like that once I put it on the ground, not like I drove all over the place, first time adjusting a chain I could have messed something up. Is what it is, I just want to know what it is.
 
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