Clunk when I relise clutch in 1st gear

[Dtaylor12345]

Hello in my riding on my Honda cbr 650f I have noticed every now and then I get clunks when I relise the clutch. It's mainly in the first 3 gears . As a example let's say iff I'm downshifintg into 3rd gear from 4th I select 3rd gear and only soemtimes when I relise the clutch once it's in 3rd gear it will give me feedback I seem to get a little clunk or if could be any of the first 3 gears also it could be going up with box it's always once the gear is selected it sound like a simailr noise to when you change gear but not qwite as loud but it's always when it's already in gear soon as I relise clutch clunk.... also I will sometimes experience the same when I'm in 1st gear in traffic and I just want creep forward so let's say I just bring the clutch to its bighting point I can hear a clunk it's just weird it only seems do it every now and then like 3 out of 5 attempts it's abit like on this video but not half as bad but u get the idea ..https://youtu.be/ruy2adrEpVo I am picky but I just want know EXACTLY what it is I've replaced cush drives sprockets my clutch is working fine and freelplay is fine .
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DT

[Johanna]

I have a CBR650F as well and have not had that clunk happen to me.

I guess that info isn't very useful to you, except that it's the same bike.

So... have you ridden many other bikes? If so, has it happened on them?

[chris-red]

What's your Chain tension like?
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[Dtaylor12345]

My chain tension is perfect everything is I mean when I say about a clunk it's not like very loud most people might not be able tell it's beacuce I'm picky but I like things perfect it's driving me mad
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DT

[bacon]

What do you set your chain tension at? Measure at the slackest point.


Some bike gear boxes are just plain clunky tbh. Get someone else to ride it and see if they notice anything.


Oh and I don't mean to be rude, maybe english isn't your first language? But commas help a lot in helping people read and understand what you've written! A wall of text is neither fun or easy to read.

[stinkwheel]

Transmission snatch is normal, especially if you are changing from neutral into first gear.

I wonder if what you're describing is just the gear fully engaging with the dogs of the next one. When you shift, the lever slides a cluster of gears along a shaft and they don't always fully engage with the next gear until some load is put on them.

Excessive low-rev transmission snatch can also be a collapsing sprocket carrier bearing.

Link to how a gearbox works: https://youtu.be/IFjSVgNFd6E
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[Polarbear]

While most gearboxes clunk when you drop them into 1st I can't think of any of the many many bikes I have owned that have clunked when letting out the clutch.

If, as you said, your chain tension is OK I'd want to check the cush rubbers next.
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[Dtaylor12345]

I'm dyslexic so I'm sorry iff my writing isn't up to your standard. And yes It has nothing do with selecting the gear! It's normal to get clunks when going into gear. I'm experiencing this after the gear is selected (already in gear) when I relise clutch I get a clunk. .. and yes mate it's had new cush rubbers and chain and sprockets I have a 25mm to 30mm of chain movement . Like I say I'm confident everything is set up right.
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DT

[bacon]

No offence intended, you'll get more people replying if it's easier to read

[Teflon-Mike]

Why do I get the impression that you are a more mature but fairly new rider, used to Audi-Like standards of consumer transparency?

[Dtaylor12345]

I have been riding bikes since I was 18 well 125s im nearly 23 and have been riding my restricted cbr 650f for about a year.
I have a good understanding about motorcycles and I do like to learn about them I know that they are very simple compared to car boxes. I do love my bike I just like to know where certain sounds are coming from iff I notice something.

When i first checked over my bike I noticed my cush drive needed replacement so I thought that's got be where the noise is from .
I bought aftermarket sprockets and had them fitted with a new cush drive. Honda accepted my cush drive under warrenty so I just paid for half a hour Labour charge for fitting my supplied new sprockets and chain.

Anyways my bike felt better but I relised I can hear the noise every now and then still. So when I removed my front sprocket cover I could move the sprocket with my fingers it Has to much movement on the shaft by like 1.5mm the sprocket seems to thin in diameter.

I have orderd a original sprocket as my mate with the same bike his standard sprocket dosent move .

I'm hoping this will sort the issue out . But it's kinda annoying becauce I don't know iff I have traded one noise for anouther sound what is the same iff that makes sence .
I will let you know once I've sorted the sprocket but I thought I would ask on here incase it's still the same after 😂🤣 thanks allot.
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DT

[bacon]

That new nougat of info may well be exactly what you are hearing.

A front sprocket should not have free play like that, they usually have a tabbed washer or similar to stop it backing itself off under vibration. Maybe yours was installed without that and thus it has freeplay? Or maybe it's as simple as an incorrect front sprocket was fitted.

I'd not ride that until it's replaced

[Pjay]

[stinkwheel]

Original honda sprockets usually have a small rubber damper fitted too to reduce chain noise.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Dtaylor12345]

Sorry iff I'm not replying back into the right area I'm new to the forum I'm still getting the hang of it haha.

And yes I'm not riding it untill the original sprocket has arrived. but I will need to for a short ride to my mates house with all the correct equipment so I will just take it easy.

It's qwite frustrating how the dealer let me ride it home with how it was . I mean I am qwite OCD with things lol but it's a good thing in a way beacuce I would of never known it had movement iff I didn't look out for it . I can't trust dealers I'm not looking forward untill they do the valve checks. It's like they don't accturaly know what they are doing unless they just do half a job I've found most bike shops the same they are nothing but a pain.

After looking at diagrams of the sprocket. It does look to have the correct spacers there so it's got to be the sprocket what's to thin.. the clunks I'm experiencing sound basically the same as the movement of the sprocket so I'm hoping it will be sorted when it arrives .

The only thing the noise could come from originaly was the cush drive as the standard front sprocket I had on before won't move . So fingers crossed I've swapt one noise in the cush drive for the crap aftermarket sprocket wish me luck.

Iff there is still the same sound could it be ware in the gear box / clutch?. Iff so I want catch it early so it's done on warrenty lol
I apologies again for my rubbish grammer. DREW .
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DT

[Dtaylor12345]

So I've bought a original front sprocket all of the correct spacers and everything is there but it's still moving on the shaft it's pissing me off !

It oviolsy needs a shim there but I just don't no why when it's got everything there is normally needs!
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DT

[Pjay]