gear oil turning grey?

[bionnick]

ive noticed oil leaking from my kdx and its grey, is this due to water and oil mixing if so how?, i can only think either base gasket or water pump seals failed, is there any other way the water can get into the gear oil or a common fault i dont yet know about, the gear oil was replaced 1 month ago and only been out twice. regards nick.

 

[jarin12ga]

I would replace water pump gasket first and start with the easier stuff first!!That's a tough one?

 

[geoffro]

Waterpump seal is THE most common thing to cause that. Preferably dont ride it like that either.

 

[bionnick]

thanks for the reply's, i will order new seals tomorrow.

 

[EYY]

The only way coolant can enter the gearbox is through the water pump seal. Make sure you replace the bearing in the case too while you're at it, it's cheap insurance. Check for other worn seals around the gearbox such as the clutch actuator shaft seal, as water can get in from outside when washing the bike etc

 

[IndyMX]

usually water and oil mixed isn't so much grey as it is coffee colored.. sorta brownish..

is it milky looking or more towards silver?

if it's more silver, that's from your clutch plates and it's normal. Change your oil more often. And fix that leak.

 

[bionnick]

the oil is more silver/grey, i went out yesterday on it for around 3 hours and when i got home and it had cooled down i checked the rad and there is no loss of water so now im thinking the water is from the outside getting in,im going to change the gear oil this week, do you think its worth flushing the old gear oil before i change it.

 

[IndyMX]

It's not water.. Silver/grey is clutch related.. It's normal. You most likely have aluminum plates in the clutch. When they wear, you'll get a silver look to your oil. Just drain and change.

 

[jarin12ga]

Good point?

It's not water.. Silver/grey is clutch related.. It's normal. You most likely have aluminum plates in the clutch. When they wear, you'll get a silver look to your oil. Just drain and change.

Make sure there is a problem before you make one???

 

[bionnick]

today ive changed the gear oil for type f atf because i keep reading good results from people using it and already ive noticed the gears are much smoother and even the clutch feels better and the kickstart is slipping alot less, and on inspection the old gear oil didnt look that bad just a bit silvery, thanks for all the replys and advice.

 

[IndyMX]

You're welcome.. But still get that leak fixed.. Need to get the oil in the bike, not on the ground near it...

 

[BSWIFT]

I've used the type F atf for 10+ years. I buy the cheapest stuff I can find and change ever other ride. Hope you get your leak fixed and you'll be happy with the shifting using the atf.

 

[bionnick]

ive found the leak and its coming from the shaft that the front sprocket sits on, im guessing its the rubber seal that sits around the shaft that needs replacing? if so do i need to split the crank to change this or do i simply remove the sprocket and pull the seal out that way? thanks Nick.

 

[dirt bike dave]

Never had to replace one, but I found some links on google indicating the KDX countershaft seal can be changed from the outside without splitting the cases.

 

[bionnick]

thanks dirt bike dave, ive had a good look about on the web and i thinks its a realy simple job, remove the sprocket and pick out the seal then replace an o ring put back together (i hope).