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A Yamaha Big Bear 400 may backfire due to several factors, including improper fuel-air mixture, a clogged air filter, or issues with the ignition system. If the carburetor is not adjusted correctly, it can lead to an overly rich or lean mixture, causing backfiring during deceleration or acceleration. Additionally, a faulty spark plug or exhaust leak can also contribute to this issue. Regular maintenance and tuning can help prevent backfiring.
What else can I help you with?
What makes a Yamaha big bear 400 backfire thur the carb and exhaust?
Loose intake boot or the boot may not be on straight. Happens everytime.
How much oil does a Yamaha big bear 400 hold?
The oil capacity for the Yamaha Big Bear 400 is 3.2 quarts. It is recommended you use 10w30 oil in the Big Bear.
What weight oil for Yamaha big bear 400?
yamalube 10w30
What is the oil capacity on a 2000 Yamaha big bear 400?
3.2 quarts
What year model is a Yamaha Big Bear 400 with VIN 5y4ah06w5ya002834?
1999
Where is the serial no on a Yamaha big bear 400?
on the left frame in front of the engine.
Where can one learn more about the Yamaha Big Bear 400?
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.
What are the head torque specs on a 2006 Yamaha big bear 400?
58 foot pounds
How do you set the idle on a 2003 Yamaha Big Bear 400?
To set the idle, adjust the carburetor.
What is the spark plug gap for a Yamaha big bear 400?
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.
Where is the VIN number on a Yamaha big bear 400 ATV?
On the steering shaft stamped on an aluminum plate
Where is the vin number on Yamaha big bear 400 ATV?
On the steering shaft stamped on an aluminum plate
