Hey I have what I think is a 1985 Yamaha 4 moto 200. It is the model before they made them with suspension. Anyways im looking to do an oil change but can't seem to find a straight answer on what kind of oil it takes. If anyone has any insight on this please let me know.
thanks

 

It is like most other ATVs, it has a wet clutch system, that is, the engine oil and the clutch discs share the same oil, so you will need a wet clutch compatable oil. Anything that is motorcycle wet clutch rated, or a specific ATV JASO rated oil will do. Never use Automotive type oils, especially ones with "Energy Conserving" on the label, they contain addatives that will make the clutch slip. Some have used Rotella T oil, it is a heavy duty fleet diesel type oil, it has no addatives in it. I have heard of some using Mobil One, as long as it is the red cap version with no friction modifiers added. But to be safe, just use a motorcycle or ATV oil, the main thing to look for is either "wet clutch compatable" or the JASO rating ( this signifies use for wet/hydraulic clutch systems)

 

Thanks for the reply dude, I wasn't too sure on the wet cluth thing. What ratio would you recomend like 10w40? thats also kinda what I was confused about.

 

For an older air cooled motor, 10-40 would be fine, if you run it a lot in winter, you could even try the 0-40 synthetic, but its not cheap !!

 

Alright man cool, thanks for the info. Ill go pick some up and do a much needed oil change.