Is this normal for a front sprocket ?

[Lars]

Hello,

in my ongoing quest to find the source of my super annoying vibrations I took the cover off the front sprocket and noticed that the sprocket can be moved around on the driveshaft. The actual driveshaft is not moving, the bolt is tightened to spec.

Here's a video of what it does:

&feature=youtu.be

Apoloigies for the quality, I had to hold my tablet in one hand and the screwdriver in the other while trying to net get all that greasy dirt onto everything.

It does not feel like that is normal... What do you guys think about that ?


Lars

[gatesy]

Definitely wrong.
Take it off and check driveshaft for wear right away, hopefully before damage has been done. Replace with only genuine Honda part everytime.
Fingers crossed.

John

[Lars]

Hello John,

thank you for the feedback. In a way I am relieved that this is not normal because that would very much explain the vibrations I have been hunting the last months.
The bike is scheduled for a chain kit replacement on thursday. So far I have always used genuine Honda parts for everything and the new one is going to be an original part again.

If anyone knows a good way to ask the spirit of Sōichirō Honda that it really is just the sprocket thats busted please let me know.

Lars

[Lampie]

imo it is wrong too
I replaced my chain and sprockets myself, and noticed there is no rubber anymore on the replacement sprocket.
Also the rim on inside and outside are different in hight.
First time , I mounted the lower rim on the inside... so you could read the numbers on the sprocket.
Well... wrong way arround,chain was whining like crazy.
Put the high rim towards the gearbox, should be OK
I have JT sprockets and a DiD chain (€ 105 + € 7 shipping)
You can buy OEM  Honda Sprocket 23801MJMD00  about € 30 ebay, same amount for shipping if you can afford it

 
This is WRONG way, flip the sprocket for correct alignment of the chain

[Jonnyteabag]

You need to get that front sprocket off and check that the wear is on the sprocket, if it is then just replace with new and your good to go...but if there's wear on the shaft splines then depending on how bad you may find that a new front sprocket could still move back and forth under load even with the bolt tight.
I hope you're lucky..

Stay safe
JT

[Crosspurpose]

I thought I’d check the sprocket on my CR today. It is was fine but I didn’t realise that the slave cylinder has a spring in it and that it can come out despite my not touching the clutch lever. A happy time was spent trying to bleed the cylinder manually. I did d it in the end but I think I’ll buy me a proper bleeder....Oh well, next time I’ll know to use an elastic band to stop the piston escaping

[Lars]

Hello Crosspurpose,

I hate to tell you that but... you can push it back without bleeding the system. I personally had to because in a moment of absent mindedness I pulled the clutch to get it into 1st gear, followed by a eath shattering curse when I noticed what just happened.
You just need to put the cover back on as far as it gets use two thumbs and "gentle force". I too was hestitant to push it back in because it really needs a proper push but it works. Once you are over the initial resistance of the internal membrane ( I assume ) it slides back in quite easily.

also, UPDATE, the chain kit was replaced yesterday and thanks to the Honda spirits ( or their engineers, who knows ) the driveshaft took no damage and the chain part of my vibrations is GONE. I still have vibrations that were not there before and I will continue looking into that but the bike doesn't sound and feel like it is grinding gravel anymore.


Lars

[Skids]

Good news Lars.

Keep us updated please. 

[Crosspurpose]

Yes, glad the final drive issue is sorted. The problem I had was that most of the fluid had come out by the time I realised what had happened as I was attending to something else at my bench. So I thought I might as well remove the piston fully ( it had tilted in the bore, hence the fluid loss). I always have lots of water nearby when working on hydraulics so no paint damage occurred. All good now and further knowledge of my CR gained