I have the screw on the rear of the throttle practically all the way out -- but not totally removed -- on my 2002 Big Bear 400 and it routinely maxes out at around 42 MPH.
47M0p
The oil capacity for the Yamaha Big Bear 400 is 3.2 quarts. It is recommended you use 10w30 oil in the Big Bear.
yamalube 10w30
1999
3.2 quarts
on the left frame in front of the engine.
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.
To set the idle, adjust the carburetor.
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.
45 to 50 mph
rev limiter
On the steering shaft stamped on an aluminum plate