Actually somewhat simple. You need to remove it from the machine. To do this, remove the nuts attaching it to the head. I remove the slider cable by removing the 3 screws at the top. Next, remove the second throttle cable by taking off the plastic plate on the side and disconnecting the cable on the inside.
I placed it on some clean cotton cloths and removed the bowl, jets, choke plunger, diaphragm and ran choke cleaner through it all. I would recommend that you replace the float, diaphragm, and rubber gaskets. Check the slider for wear and replace this if it is worn.
Mukini
To set the idle, adjust the carburetor.
The four wheeler will run for a few seconds then just cut off and it wont have near as much power.
The oil capacity for the Yamaha Big Bear 400 is 3.2 quarts. It is recommended you use 10w30 oil in the Big Bear.
YFM 350SE Big Bear 4x49725x8x1225x10x12
What year is my big bear 5y4aho6y53ao43832
87 Yamaha big bear troubleshooting electrical no fire what are some solutions?
96-99 Yamaha Big Bear & Kodiak. Excluding 96 Big Bear 350 4X4.
22.9 HP
Time for a rebuild
On a 400 Yamaha Big Bear ATV, the gas filter is typically located in the fuel line, near the carburetor or fuel petcock. To access it, you may need to remove the seat and fuel tank, depending on the model year. Always refer to the owner's manual for specific guidance on your ATV's configuration.
What is the spark plug gap setting for a 1987 yamaha big bear