To set the idle, adjust the carburetor.
The oil capacity for the Yamaha Big Bear 400 is 3.2 quarts. It is recommended you use 10w30 oil in the Big Bear.
The most likely problem is crud in the idle jet..... Happens often... My buddy and I experience this all the time. The new gas with ethanol goes bad fast and algae will start to grow.... We have actually found algae in the carb bowl.... It's a pain in the butt.
yamalube 10w30
1999
on the left frame in front of the engine.
3.2 quarts
If one is interested in learning about the Yamaha Big Bear 400 the best place to go would be to the Yamaha website. The individual(s) could also go to their local Yamaha store in their area and the salesmen there could share a wealth of knowledge with them on this topic.
58 foot pounds
The spark plug gap for a Yamaha Big Bear 400 should be set at .024 inches. A new spark plug may be purchased at an auto parts store with the gap preset.
On the steering shaft stamped on an aluminum plate
On the steering shaft stamped on an aluminum plate
According to the parts list, no, but they should be interchangeable. They just are built for their specific purpose.