Front sprocket O ring (oil seal)

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Hi,
I changed the "O" ring on my front sprocket a few weeks ago,and all was well,until a few day's ago.
It has started leaking again  :11doh:
When i fitted the new ring,i pushed it too far back and it was not flush with the outer casing the way it should be,but to correct it at the time would have meant destroying the "O" ring to get it back out,so i just left it like that and it was fine.

Anyway,i have just took it back out now to get it ready for the new O ring coming tomorrow,and i thought id try fitting it back in,but this time flush with the casing the way it should be.
Did that and started the engine,and it's leaking quite bad.
I did'nt think the oil behind this o ring would be under so much pressure?
I can actually see the oil forcing it's way past the o ring(at the point of the o ring where i stuck a screwdriver into it,to get it out,so it does have a split in it.)
Is this normal?>and if i just fit another new o ring,should it solve the problem~?
https://i187.photobucket.com/albums/x13/fronterapics/DSC00159.jpg

https://i187.photobucket.com/albums/x13/fronterapics/DSC00158.jpg

https://i187.photobucket.com/albums/x13/fronterapics/DSC00157.jpg

Thanks
Dave
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DRZ-400sm

[petemell]

If the sprocket shaft bearing was wearing out this would cause the front sprocket to oscillate, this may make it leak.

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Thanks for the reply

I have started the bike and put it into gear,and the shaft looks straight.That was including taking into 6th gear(spinning quite fast),so im fairly sure the shaft is straight,or if it is off,it is only very slightly,and barely visable.

As for the mileage,the bike has only done 23k kms,so i think it's unlikely.

However,the drive chain was a little too tight .



Thanks for the reply.

Dave
____________________
DRZ-400sm

[petemell]

Hi again Dave, if you just put the bike in neutral, then get hold of the front sprocket shaft with the engine turned off of course.
Can you detect any play in the shaft when you try and shake it by hand?
Or are there any clicking noises when you rotate the shaft forwards and backwards?
If this is ok it may just need another new seal.

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Just thought id update this thread incase anyone else has this problem with this bike.(not that anyone other than me owns a klr650 )

In the pic below you can see the splined shaft where the front sprocket fit's on.
The outer ring or collar on this shaft pulls off,and below it is a small o ring(oil seal).

https://i187.photobucket.com/albums/x13/fronterapics/DSC00157.jpg
I replaced this smaller o ring,aswell as the collar,and the outer o ring and the leak is now fixed

Had a great day today,back on the road on my klr .
Been using my 100cc scooter while the klr was broke. tis a great feeling being back on a real bike


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DRZ-400sm

[UB3ER]

did you have to split the cases bro?

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Nope.
The o-ring just pulls out and the new one pushes in.Quick and easy 5min job
____________________
DRZ-400sm

[UB3ER]

is the oil seal with a lip or not ? o_O cuz mine with a lip