Oil leaking everywhere, ahhhh

[ir0nslash]

hey guys

well my bike decided to leak oil , I rode home from work Thursday straight of the motorway left lights did a drifty thing straightened up and took off , I thought it was the rain ,
was going to go for an afternoon ride yesterday after work
started the bike up left it idling for a min or so putting on gloves and helmet jumped on reved it and looked down and saw all this oil pouring out of it ,
took off fairings yesterday got to dark ,
started it up again today and as soon as u start it oil pours out from behind this dark grey cover where chain is , ive looked top and bottom cant see the leak its like coming out directly behind this cover ...

could any one help please , this is my first bike and I actually don't know to much about them yet to just rip in and fix straight away , I will once I have an idea what I need

bike
Kawasaki ZZR 250 1994

315024

315025

315026

315027

315028

315029

[tri boy]

3 possible causes come to mind. (there may be more).

1 Gear select shaft seal.

2 Countershaft,(sprocket shaft) seal.

3 Neutral light switch.

Take that grey cover off, (noting the gear shift coupling position), and degrease the area, and let it dry off before starting the bike. (make sure the bike was in neutral before removing the gear select shaft linkage).

The oil leak should show up quickly.

Good luck.:msn-wink:

[mossy1200]

3 possible causes come to mind. (there may be more).

1 Gear select shaft seal.

2 Countershaft,(sprocket shaft) seal.

3 Neutral light switch.

Take that grey cover off, (noting the gear shift coupling position), and degrease the area, and let it dry off before starting the bike. (make sure the bike was in neutral before removing the gear select shaft linkage).

The oil leak should show up quickly.

Good luck.:msn-wink:

All good advice.
Seems to be coming down behind the chain oil accumulation. Maybe collapsed final bearing. Any noise while riding or tight spot in chain.

[FJRider]

3 possible causes come to mind. (there may be more).

1 Gear select shaft seal.

2 Countershaft,(sprocket shaft) seal.

3 Neutral light switch.

I'd go with either 1 or/and 2 myself ... :innocent:

Unless it's fom the breather hose from the rocker cover ... and then there might be more serious issues involved ... :gob:


Take that grey cover off, (noting the gear shift coupling position), and degrease the area, and let it dry off before starting the bike. (make sure the bike was in neutral before removing the gear select shaft linkage).

The simplest ... and most effective starting point to be sure ... :yes:


The oil leak should show up quickly.

Understatement ... :laugh:

[ir0nslash]

thanks a lot guys !

[ir0nslash]

so yes it was the Countershaft seal , it had pushed itself back out ?? i pushed it back on and its not leaking ?? do i replace it or should i buy a new one ?

[Drew]

Might not have been put in properly, but also possible that the bearing has movement and it has pushed the seal out.

[mossy1200]

Might not have been put in properly, but also possible that the bearing has movement and it has pushed the seal out.

Any chance of blocked breather and pressure in the bottom end shifting it?

[ir0nslash]

hmm well I hope not , I pushed it back in , flushed old oil out any way and out new filter and oil in it , went for a ride seems alright , not really any lag or anything so if it happens again any time soon I sadly will have to look into it way more , but for now im just stoked hasn't costed me much at all this time

[FJRider]

hmm well I hope not

Have you not checked the breather hose .. ???

[Ocean1]

hmm well I hope not , I pushed it back in , flushed old oil out any way and out new filter and oil in it , went for a ride seems alright , not really any lag or anything so if it happens again any time soon I sadly will have to look into it way more , but for now im just stoked hasn't costed me much at all this time

One of the likely causes is, I'm afraid a fucked CS bearing in behind the seal, there.

If you take the chain and sprocket off you should be able to feel bearing damage by playing with the shaft. You shouldn't be able to fee any lateral, (up/down/forward/backwards) movement at all. It's also likely that if it's fucked it'll feel like there's grit in there, intermittent free/stiff feel.

You can ignore it, but it may cost much more if you do.

[FJRider]

... You can ignore it, but it may cost much more if you do.

My thoughts ... if it came out of it's own accord once ... it will come out easier on it's own accord again.


When and where that will happen ... is the gamble the rider must take.


Everybody loves a gamble ... right ... :laugh:

[AllanB]

People pay a lot of money for those Scott Oilers - yours was free.

Fix it. The next time may coat your rear wheel causing you to slide off a cliff and break your spine.

[ir0nslash]

The next time may coat your rear wheel causing you to slide off a cliff and break your spine.


what a way to convince someone to do it haha

I fully wouldn't know where to start when it comes to something sounding so serious ....

[FJRider]

Fix it. The next time may coat your rear wheel causing you to slide off a cliff and break your spine.

But it could get more serious than that ... he might hit a Yamaha before he goes over the cliff ... :calm:

[mossy1200]

Question because im to lazy to check myself. Wouldn't any seal in that area normally have a circlip or ring to prevent it popping out?

[FJRider]

Question because im to lazy to check myself. Wouldn't any seal in that area normally have a circlip or ring to prevent it popping out?

Often just pressed fit ... as with most sealed bearings ..

[caspernz]

Maybe this is a silly thought, but if the CS seal has been pushed out is that possibly because the crankcase pressure is too high? As in vent blocked or worn piston rings...

[mossy1200]

Maybe this is a silly thought, but if the CS seal has been pushed out is that possibly because the crankcase pressure is too high? As in vent blocked or worn piston rings...

We went there earlier.

My ride went there also but previous owner rigged a long breather line out the back that could inflate car tires.

[Ocean1]

Question because im to lazy to check myself. Wouldn't any seal in that area normally have a circlip or ring to prevent it popping out?

Never seen that on a bike. Rarely seen it anywhere, usually just a light press fit.

As someone said, it's possible that high crankcase pressure may have popped it out, some seals have a thicker skin of rubber on the OD, (presumably in order to seal better in the case) and they're not as tight.

[Drew]

Never seen that on a bike. Rarely seen it anywhere, usually just a light press fit.

As someone said, it's possible that high crankcase pressure may have popped it out, some seals have a thicker skin of rubber on the OD, (presumably in order to seal better in the case) and they're not as tight.

Would still need serious performance crippling issues to get the case pressure that high though. The breather hose would be blown off it's spiggot first. There is one on the rocker cover as well don't forget.