Aprilia RS 50 am6 water in oil?

[Derbi_Airsal]

I noticed changing gear became harder and louder..I checked the gearbox oil and it was milky and way above the correct oil level. Im guessing a gasket or seal has shit its self? Which one would it be? Thanks in advance 👍✌👌

[-]

I'd say water pump seal.
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[P.]

[_Iain_]

More than likely the water pump seal. Easily diagnosed by a lack of coolant in the radiator.

Rebuild water pump, flush gearbox with clean oil or motorcycle engine flush & then put it all back together again.

Had this on the CR, but this is what was involved on that. Yours is a little more simple;

https://i.imgur.com/wp7MemK.jpg

This is not 650ml of 10w40.

After filling the gearbox up with a few litres of clean oil, kicking it over a few times slowly, pumping the clutch and rolling it back and forth in gear I dumped it and was left with this yummy mess;

https://i.imgur.com/kfNZdm2.jpg

More coolant in the gearbox. Seals obviously gone so have had to strip the pump out, seemed like a good excuse to decontaminate the clutch & refurb a few bits.

https://i.imgur.com/ZrWgera.jpg

Yummy instant gasket on the water pump cover - knackered seals still in place

https://i.imgur.com/3oelxuR.jpg

The cure for a failed water pump seal - screw and more instant gasket in the vent hole.

https://i.imgur.com/bimAow1.jpg

New seals/bearings fitted, reassembling the water pump;

https://i.imgur.com/S7dZzxi.jpg

This is called a gasket, I dont think many people recognise the existance of such things;

https://i.imgur.com/SKIL0Rq.jpg

Even fitted a new seperator as the old one looked a bit scummy;

https://i.imgur.com/g0qrhxK.jpg

On to removing the 50% instant gasket, 50% mashed old gasket off the waterpump cover...

https://i.imgur.com/ecrQ4Fj.jpg

Much better;

https://i.imgur.com/jKN7E7Y.jpg

Worth noting however that the next run the clutch shat itself bigtime, partially due to my n00b offroad skills, partially due to being soaked in coolant for ages.
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[RhynoCZ]

Wow, that's rusty, what have you used as coolant?
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'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[P.]

[_Iain_]