does anybody know what kind of rear end fluid is recommended for a 98 yamaha big bear 350 2wd

 

I would assume it should be 80w/90 gear oil.
"Friction modified" if it has a wet brake.

 

id go with 80 90 as long as its not wet brack then you have to go to a atv repair shop or dealer

 

im still learnin when it comes to workin on 4wheelers so how can i tell if my big bear has wet brakes

 

best way internet can tell you every thing thats what i would use

 

If it has a conventional rear brake/hub
you should see it off to one side near a wheel.
I would assume that you have a solid axle,
so you should have a conventional brake hub.
Newer Yamaha's with rear CV shaft axles will have brakes inside the rear diff.
Hence the name "wet brake" as brakes are bathed in oil inside the rear diff.

 

i dont believe the 350s have a wet brake at least mine doesnt. the gear oil it takes is 80w 90.