Justin Posted on Jun 07, 2014

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Why is it this 2007 yamaha big bear will only start when I have my hand covering the intake tube, and it dies the moment I remove my hand and let it breath. What is going on?

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Chad Hendrich

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Posted on Feb 24, 2015

Chad Hendrich

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Check fuel flow from tank and clean carb, pilot jet is for idling.

Joel Friedenberg

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Posted on Jun 07, 2014

Joel Friedenberg

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Your hand over the intake is acting to choke the engine. So it sounds like the engine is not getting sufficient gas. Check all fuel delivery sytem parts. Maybe a dirty carb. Clean out with carb cleaner. Change fuel filter.

Lawrence Oravetz

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Posted on Jun 07, 2014

Lawrence Oravetz

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It's starving for fuel.

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Yamaha Big Bear 400 is running rich, it runs good at high speed but loads up at idle. Not sure where the mixture screw is located on the carburetor? It's a Mikuni BSR33.

Question edited for clarity and add maker.
Question moved to a Big Bear category.
Chat GPT4 Answer from AI Bot 'Gerry' deleted.

Mikuni tuning in the link. The screw is under the intake bell.

https://www.google.com/search?q=mikuni+bsr33+carburetor+tuning

..

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Sep 27, 2023 • Yamaha 2005 Big Bear 400 4x4

0helpful

1answer

I have a Yamaha big bear 350 4x4 I put new cv axis on both front still make grinding sound

If the CV Joints are new and correctly inserted, the most likely culprit for the noise would be the brakes. Remove the front wheels and turn the hub.

It could also be the front differential, or failed wheel bearings. Details in the link.

https://www.google.com/search?q=Yamaha+big+bear+350+4x4%2C+front+wheels+grinding+noise

..

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Oct 19, 2022 • Yamaha 2005 Big Bear 400 4x4

0helpful

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Yamaha 250 Big Bear loud bang bike dead

See professional technician!!!

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Feb 14, 2017 • Yamaha 2007 Big Bear 250

0helpful

1answer

My 250 big bear was running and was jumping another bike I think the postive jumper grounded out un battery strap an my big bear reved up an died what happend wont start ???

check your fuse?

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Feb 15, 2016 • Yamaha 2007 Big Bear 250

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2005 Yamaha Big Bear 400. How do I replace rear brakes?

Removing The Rear Brake Drum & Shoes on Grizzly 600 ...

? 5:04
www.youtube.com/watch?v=n5oO7v3nT6s
Mar 11, 2012 - Uploaded by myquadrepair
Removing the rear brake drum & shoes on Yamaha grizzly 600. ... Yamaha Big Bear Oil Change and More! - Duration: 10:43. by jfrost77hd ...

HONDA FOREMAN REAR BRAKE CHANGE PART 1 ...

? 11:49
https://www.youtube.com/watch?v=xQanZdlDCI0
Jul 17, 2012 - Uploaded by 400EX99N
HOW TO CHANGE REAR BRAKES ON A HONDA ATV. ... is this about the same for a 2004 yamaha big bear 400? Read more Show less.

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Nov 03, 2015 • ATVs

0helpful

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2007 Big Bear. Where can I find a video showing removal of the flywheel?

You need a Yamaha special tool to remove the flywheel.. the local dealer should pull it for you..maybe a minimum charge or buy the guy a beer or coke,,(I charge a 20oz. coke)

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May 24, 2015 • Yamaha 2007 Big Bear 400 IRS 5-Speed 4X4...

0helpful

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I have a yfm25bw big bear 250 Yamaha it wont start, has a very weak spark, back fires sometimes. I have changed the coil , but still the same ,good it be the cdi unit ?

Most newer engines use an electronic ignition system, if the spark is weak verified at night (in the dark) by removing the spark boot and watching the arc jump onto the engine block, then this could be your problem. Otherwise, you have a carburetor issue which is very common in ATVs. Rebuild it using a complete kit to include a float and throttle spring... replace dog eared screws, if there are any. Ensure you put the keeper clip on the correct groove on the needle valve and be careful when bending the float arm as they break off easily... making them useless.

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Feb 27, 2015 • Yamaha 2007 Big Bear 250

0helpful

1answer

Location vin number

try looking on the frame near the steering column

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Jul 09, 2014 • ATVs

0helpful

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Clean out a yamaha big bear carburetor

remove screw or large hex head plug in bottom of carb..drain and replace screw or plug.. . A K&N must be clean, lightly "oiled",, and dry..

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Mar 18, 2014 • K and N Yamaha Big Bear Yfm350fw Air...

0helpful

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Yamaha big bear 400 wont idel and the red revers light blinks

idle control is sticking need carb adjusted or float maybe

Read full answer

Sep 30, 2013 • Yamaha 2007 Big Bear 400 IRS 5-Speed 4X4...

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Yamaha Big Bear 400 is running rich, it runs good at high speed but loads up at idle. Not sure where the mixture screw is located on the carburetor? It's a Mikuni BSR33.

Yamaha 2005 Big Bear 400 4x4

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Why is it this 2007 yamaha big bear will only start when I have my hand covering the intake tube, and it dies the moment I remove my hand and let it breath. What is going on?

3 Answers

Chad Hendrich

Joel Friedenberg

Lawrence Oravetz

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Related Questions:

Yamaha Big Bear 400 is running rich, it runs good at high speed but loads up at idle. Not sure where the mixture screw is located on the carburetor? It's a Mikuni BSR33.

I have a Yamaha big bear 350 4x4 I put new cv axis on both front still make grinding sound

Yamaha 250 Big Bear loud bang bike dead

My 250 big bear was running and was jumping another bike I think the postive jumper grounded out un battery strap an my big bear reved up an died what happend wont start ???

2005 Yamaha Big Bear 400. How do I replace rear brakes?

Removing The Rear Brake Drum & Shoes on Grizzly 600 ...

HONDA FOREMAN REAR BRAKE CHANGE PART 1 ...

2007 Big Bear. Where can I find a video showing removal of the flywheel?

I have a yfm25bw big bear 250 Yamaha it wont start, has a very weak spark, back fires sometimes. I have changed the coil , but still the same ,good it be the cdi unit ?

Location vin number

Clean out a yamaha big bear carburetor

Yamaha big bear 400 wont idel and the red revers light blinks

Not finding what you are looking for?

Yamaha Big Bear Yfm350fw Air Filter

Yamaha Big Bear 400 is running rich, it runs good at high speed but loads up at idle. Not sure where the mixture screw is located on the carburetor? It's a Mikuni BSR33.

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Why is it this 2007 yamaha big bear will only start when I have my hand covering the intake tube, and it dies the moment I remove my hand and let it breath. What is going on?

3 Answers

Chad Hendrich

Joel Friedenberg

Lawrence Oravetz

Add Your Answer

Attachments: Added items

Related Questions:

Yamaha Big Bear 400 is running rich, it runs good at high speed but loads up at idle. Not sure where the mixture screw is located on the carburetor? It's a Mikuni BSR33.

I have a Yamaha big bear 350 4x4 I put new cv axis on both front still make grinding sound

Yamaha 250 Big Bear loud bang bike dead

My 250 big bear was running and was jumping another bike I think the postive jumper grounded out un battery strap an my big bear reved up an died what happend wont start ???

2005 Yamaha Big Bear 400. How do I replace rear brakes?

Removing The Rear Brake Drum & Shoes on Grizzly 600 ...

HONDA FOREMAN REAR BRAKE CHANGE PART 1 ...

2007 Big Bear. Where can I find a video showing removal of the flywheel?

I have a yfm25bw big bear 250 Yamaha it wont start, has a very weak spark, back fires sometimes. I have changed the coil , but still the same ,good it be the cdi unit ?

Location vin number

Clean out a yamaha big bear carburetor

Yamaha big bear 400 wont idel and the red revers light blinks

Not finding what you are looking for?

Yamaha Big Bear Yfm350fw Air Filter

Yamaha Big Bear 400 is running rich, it runs good at high speed but loads up at idle. Not sure where the mixture screw is located on the carburetor? It's a Mikuni BSR33.

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