Wet brake oil questions. Yamaha Big Bear 400, Prairie 700

[racinjason]

Looking for recommendations.
I need to served a prairie 700 rear diff and a Yamaha big bear 400 rear diff. Both have wet brakes. The big bear is IRS

The kawasaki of course recommends their wet brake oil. I have used tractor hydraulic fluid years ago in a Brute Force 750.

Yamaha has their wet brake oil also.




The Kawasaki says Mobil 424 will work. I have some mystic JT-5 that I think will work for that.

 

[CarbonSteel]

Shell Donax TXM, Mobil 424, or nearly any wet brake tractor fluid will work.

 

[racinjason]

I got logged out somehow and the post auto posted.


Looking for recommendations.

I need to service a prairie 700 diff and big bear rear diff. Both have wet brakes. The big bear is IRS.

Yamaha has wet brake oil part number Acc-shaft-lu-00
Or some say GL-5 with limited slip additives will work. The owners manual says you can use 80w-90 hypoid gear oil, but brake chatter will occur(it doesn’t mention limited slip additives, only yamalube).

So use GL-5 with limited slip additives? We do not have a Yamaha dealer local, closest is over an hour away.

Kawasaki says Mobil 424 will work, I have some mystic JT-5 that I think will work. Opinions?


Wonder why the same oils won’t work in both bikes? They both have gears and bearings, as well as clutch plates...

 

[kawie_guy]

I've used Mobil 424 before in my Prairie 700. Couldn't tell any difference. But now that Kawasaki's wet brake oil comes in a convenient squirt bottle, I prefer to use it instead.

Don't know about the Yammie....you'd have to look at the equivalencies. It should show 424 if compatible I would guess.

 

[racinjason]

Thanks I think I will use the mystic JT-5.