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Transmission oil?

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I have a 1999 ktm 250exc and I'm about ready for an oil change, what do you guys run for tranny oil? My manual states to use 10w40 motor oil, but I have heard that a lot of people run ATF with great results, so which one would be better to use? Thanks.

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I'm using bel ray 80W gear oil in my 125sx

I went from this Bel Ray (5gal) , which worked great, to the Rotella Monk mentions , I notice no difference. 300 XC and YZ125 and it comes out clean and not broken down at about the same intervals I was changing the Bel Ray BelRay80-85_zps939202a8.jpg

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you can run pretty much anything you want IMO

What he said. Ive run ATF, 5w-20, 5w-30 & 10w-40 in my 02 300. It all works.

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I have a 1999 ktm 250exc and I'm about ready for an oil change, what do you guys run for tranny oil? My manual states to use 10w40 motor oil, but I have heard that a lot of people run ATF with great results, so which one would be better to use? Thanks.

Dextron 4 tranny oil in auto clutch

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