Wow!!! That's exactly what I needed to know. Thanks so much!Originally posted by mopar4u@Dec 1 2002, 02:27 PM
"On 1979-1982 (yamaha) models, manufacturer recommends using SAE-75 or 80 gear oil with an API classification of GL-3. To check chaincase level remove oil level plug at bottom of chaincase cover. Oil level should be even with bottom of level plug opening. 1979 EX440 holds 10.8 oz."
-Snowmobile Service Manual, 11th edition-