All 650Fs Weird hissing sound when driving

[Invincible]

Sup ✌🏼 I purchased a Honda CBR650FA RC74 2015, like 2 Month ago with 17250km, already changed tires, added a gear indicator and changed the whole sprocket and chain system and a few bolts etc. so I’m quite familiar with the bike by now.
After some time I realised the bike had the rear wheel slightly twisted, which I fixed when I changed the wheels. I also cleaned the front sprocket, which brought up the first weird noise, since before it was all covered in goo which covered it up and maybe silencing it.
Here is some noise it makes after installing the new Gears (the text on the sprockets is pointing outwards) and chain with the wheel alight:

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And now the sound it makes when driving which I have no clue where it comes from.

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I hope you guys can help me before I go visit a mechanic and ya I know it should be the other way around haha
I think I might me the front sprocket bearing or worst case the gears itself but maybe it’s “normal“?


Thanks in advance

 

[Brammers]

That sprocket has no rubber on it to help reduce chain noise. I replaced my one like that with a JT silent one... Noise is gone.

Sorry to say it's the sprocket causing it.

J

 

[Invincible]

All right thanks for the information! much appreciated
I have orderd one and will write about my experience in a few days after I installed it and drove it.

Thanks in advance Brammers

 

[Cláudio Nogueira]

I chose to replace just the chain at 25kkm. New chain on a used sproket caused the same noise. But they fit fine, I can live with it. Also the cushioning rubber on the sproket is worn and not capable anymore to damp chain contact with sproket.
If I were you I would do the same. That's how bike are, they make alot of noises 😐

 

[Cláudio Nogueira]

All right thanks for the information! much appreciated
I have orderd one and will write about my experience in a few days after I installed it and drove it.

Thanks in advance Brammers

Why did you changed the complete transmission at 17K?! My 2021 is 31k and is on the 2nd chain and still factory sprokets. Chain was replaced at 25k.

 

[Invincible]

Why did you changed the complete transmission at 17K?! My 2021 is 31k and is on the 2nd chain and still factory sprokets. Chain was replaced at 25k.

I didn’t replace the transmission, I never mentioned that. I replaced the whole sprocket/chain system, front 15T sprocket, rear 42T sprocket and chain.
I got the bike with 17k and I am planing to do quite a few big trips besides I like the thought to not have to worry about it for a long time.
When I changed the chain though I also noticed it was done with its life the side movement was to great.

Tip if you do a chain change also change the sprockets since else your chain gonna wear way to fast.
To get rid of the noise I now gonna change to a silenced front sprocket (15T) like Brammers suggested.
And yes bike do make noises but some are good and enjoyable and some are annoying and unnecessary

 

[miweber929]

Tip if you do a chain change also change the sprockets since else your chain gonna wear way to fast.

You can almost always get 2 chains per one set of OEM sprockets in my experience. The second chain will not last “as long” but you’re taking maybe 10-15% less life than if you did both. That line of “always replace chain and sprockets together” is repeated a lot and started by the sprocket companies, I think. If you’re using cheaper aftermarket sprockets, or aluminum ones, yes, for sure both every time, but an OEM chain should go 15k-20k miles easily and OEM sprockets should go double that.

 

[Invincible]

You can almost always get 2 chains per one set of OEM sprockets in my experience. The second chain will not last “as long” but you’re taking maybe 10-15% less life than if you did both. That line of “always replace chain and sprockets together” is repeated a lot and started by the sprocket companies, I think. If you’re using cheaper aftermarket sprockets, or aluminum ones, yes, for sure both every time, but an OEM chain should go 15k-20k miles easily and OEM sprockets should go double that.

Im not going with OEM therefore I change all and with the prices of those parts it’s no Biggi

 

[Redrocket]

Frightened snake in yer airbox?

 

[Invincible]

After test driving the bike now with the new front sprocket I can confirm the rateling noise is mostly gone.
Thanks again Brammers

In the Pics you can see the bike in it’s current state and I enjoy it everyday!