Front Sprocket Knock

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MillaMeter
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Front Sprocket Knock

Post by MillaMeter » Tue Jun 30, 2009 9:17 am

Hi,

Now i know quite a few people on here have been mentioning about their front sprocket knocking when they're off the bike pushing it, but I haven't seen or heard a solution yet. I'm guessing it is something todo with the sprocket bearing yeah? If it is, is there anyway to change this bearing without completely dismantling the engine?

Regards

Rich
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Re: Front Sprocket Knock

Post by masterofinsanity » Tue Jun 30, 2009 9:20 am

are you sure its not worn chain and sprockets?
Don't forget people there is more to the zxr400 than this forum... check out www.zxrworld.co.uk also.

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Re: Front Sprocket Knock

Post by MillaMeter » Tue Jun 30, 2009 9:23 am

masterofinsanity wrote:are you sure its not worn chain and sprockets?
Hi,

I've changed my chain and sprockets a few times and still the same noise :( You can hear the knocking noise at slow speeds aswell. I've even tried slackening the chain, still no good.

Regards

Rich
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Re: Front Sprocket Knock

Post by cargo » Tue Jun 30, 2009 11:50 am

MillaMeter wrote:Hi,

Now i know quite a few people on here have been mentioning about their front sprocket knocking when they're off the bike pushing it, but I haven't seen or heard a solution yet. I'm guessing it is something todo with the sprocket bearing yeah? If it is, is there anyway to change this bearing without completely dismantling the engine?

Regards

Rich
I doubt if it's the output shaft bearing.....................it lives in a very happy oil filled enviormrnt.

And no if you feel the need to change it.................................you 'll need to split the crankcase

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Re: Front Sprocket Knock

Post by RedexRobB » Tue Jun 30, 2009 12:39 pm

Is the sprocket loose on the shaft?

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Re: Front Sprocket Knock

Post by MillaMeter » Wed Jul 01, 2009 1:04 am

RedexRobB wrote:Is the sprocket loose on the shaft?
Hi,

Saying that I think it does. I remember now when I put the new sprocket on my new engine it did seem a bit wobberly. Is this something I can fix easy or is it something major? Could it be that sprocket plate that bolts onto the sprocket that's worn?

Regards

Rich
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Re: Front Sprocket Knock

Post by RedexRobB » Wed Jul 01, 2009 5:39 am

The flange you mean? Possibly, ive noticed it on both my ZXR's the front sprocket being a bit on the loose side. Id imagine its the flange tht worn since the shaft is alot less likely to wear.

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Re: Front Sprocket Knock

Post by cargo » Wed Jul 01, 2009 8:06 am

Have you considered the idea of taking the cover off and actually having a look ?

It's 3 bolts on the cover and one to get the gear change off the shaft and you'll have a lovely view of the entire area in question

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Re: Front Sprocket Knock

Post by MillaMeter » Fri Jul 03, 2009 7:00 pm

cargo wrote:Have you considered the idea of taking the cover off and actually having a look ?

It's 3 bolts on the cover and one to get the gear change off the shaft and you'll have a lovely view of the entire area in question
Hi,

I've only just managed to get enough time today to take the front sprocket cover off. Now.... the sprocket does seem to be on the wobbery side (like I said it was) so i decided to take that little lock flange off and had a looksey.

Here's what I found...

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Doesn't look good if you ask me.

New 1 on order.

Regards

Rich
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Re: Front Sprocket Knock

Post by diesel » Sat Jul 04, 2009 8:45 am

MillaMeter wrote:
cargo wrote:Have you considered the idea of taking the cover off and actually having a look ?

It's 3 bolts on the cover and one to get the gear change off the shaft and you'll have a lovely view of the entire area in question
Hi,

I've only just managed to get enough time today to take the front sprocket cover off. Now.... the sprocket does seem to be on the wobbery side (like I said it was) so i decided to take that little lock flange off and had a looksey.

Here's what I found...

Image

Doesn't look good if you ask me.

New 1 on order.

Regards

Rich


is that a chinese bank job. wobbery. you wan flied lice with that ;)
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Re: Front Sprocket Knock

Post by stug » Mon Jul 06, 2009 2:53 pm

My wifes ZXR's front sprocket was loose like that as well.
I replaced the locking washer thing with a new one from K and it was exactly the same.

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Re: Front Sprocket Knock

Post by RedexRobB » Mon Jul 06, 2009 7:05 pm

diesel wrote:is that a chinese bank job. wobbery. you wan flied lice with that ;)
:smt005

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Re: Front Sprocket Knock

Post by Wabby » Mon Jul 06, 2009 7:39 pm

Maybe this is what the knocking noise on myn is also?

Would it sounds like its coming from the front end when riding slowly?

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Re: Front Sprocket Knock

Post by MillaMeter » Mon Jul 06, 2009 10:51 pm

Wabby wrote:Maybe this is what the knocking noise on myn is also?

Would it sounds like its coming from the front end when riding slowly?
Hi,

It's def coming from the front sprocket, I can hear it when I wheel the bike in the garage. When riding it's like a really anoying grinding noise.

Regards

Rich
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Re: Front Sprocket Knock

Post by RedexRobB » Tue Jul 07, 2009 5:46 am

sure its not the chain moving over the chain guide?

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