1991 ktm 250mx 2 stroke wet clutch trans lube, what should I use?

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4
I have the factory shop manual, parts book and owners manual and the one oil they forgot to specify was the most important, the trans/clutch lube! takes. 0.8L, what should I use?
 

tomje

Thread starter
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4
I was thinking tractor oil might be good because of wet brakes in tractors. I think some use atf type f, but thats not what is in there now. There was only a quantity specified, no type or viscosity
 
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9,961
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Jupiter, Florida
I've used M1 ATF in a great many 2 stroke transmissions with excellent results.

I even used the M1 ATF in my RZ350. It's a good choice, as it's viscosity is high enough and it's well suited for gears, roller bearings and wet clutches.

 
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5,017
Location
the canyons
I use Motul 300V 4T 10w40 in my KTM 550 MXC trans. I use it in two of our shared-sump sportbikes (15w50 in the other two), and the transmissions and clutches work great in them. No problems in my KTM, and I've had it a long time.
 
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1,311
Location
Ca USA
According to the KTM owners manual the recommend viscosity is a 30 grade... so any 30 grade motorcycle oil will meet and exceed your mileage expectations...

KTM250mx91.JPG
 
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