Tranny oil turns grey

[KX500MYK]

My bike runs fine, but the tranny oil turns grey, like paint. I just changed it and after 1 ride it is grey again. Any ideas.
KX 500 1995

[Flattrack]

Check your coolant level bet its going down.... sounds like a little leak.........

[Banshee]

Grey oil means 2 things water getting into your motor or coolant leaking like Flattrack said. Since it happend after 1 ride my guess is on coolant leaking.

[bansheeracer18]

WATERit happen to my shee change the o-ring or seals befor u spin a tranny bearing like i did

[zillaguy89]

Yeah check the seal on the water pump drive. On a Kawi I think thats the only way it could possibly get into the oil like that. The coolant doesn't actually go thru the clutch case to get into the jug like a zilla. I don't think at least.

[lt250racer]

Could that gray be from the fibers of the clutch wearing.

[KX500MYK]

I'll pull off the clutch cover and check the clutch and replace the water pump bearings (2)and seal. The oil is a deep grey not whitish at all and not frothy either, so it might be the clutch going too. I will let you know.

[KX500MYK]

Changed the oil again Saturday, the 22nd. Yellow white, so pulled I it apart. The clutch is good, but one of the two bearings was shot which damaged the seal. I replaced both bearings and the seal. I did 5 or more laps, so 2.5 miles on my track, and the oil looks good still. Now it is up for sale. I just wanted to go through it before I put it up.

[mx4life]

yeah it def the water pump seal. it just happen to my kx 100. i was at the track and saw it was gray stop riding and fixxed it. and b4 u put the new oil in flush it out a few times. if water stays in there for awhile it will eat the crank bearings and she will seaze up.. hope this helps
~~kirt