ATV Yamaha Grizzly 350 2007 will not start

Put a new battery in it and add it to the price. ATV batteries are abused, they need a trickle charge if not used for a month. Expected life in a neglected state would be 3 to 4 years. Is it the original battery and 8 years old? Strip and clean the carburetor.

https://www.batteriesplus.com/battery/atv/yamaha/grizzly-300-automatic/300cc/2012

https://www.google.com/search?q=2012+yamaha+grizzly+300+clean+carburetor

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Connect Jumper Cables to Ground (A Clean Metal Surface) and to Output Side Of Solenoid - Hook Other End Of Jumper Cables to Car Battery Momentarily to By-Pass Starter Circuit - If it Starts you Have a Bad Solenoid Or A Weak Battery On ATV. Contact me for additional help! "https://www.6ya.com/philip_b05beb373d913f26"

Hey Leo.. STOP!!!! get one of these manuals... it will be invaluable to you!! Professionals USE them...(I own a BUNCH of these!!)..
I am having trouble finding the 2007/450cc grizzly?
Here is the links to Clymer and Haynes.. get one of their repair manuals!!
Yamaha atv manuals

Yamaha ATV repair manuals

Yamaha atv manuals
Yamaha ATV repair manuals

Hey Bruce,
get one of these manuals..they have the wiring diagrams and some troubleshooting tips.. trace the wires using the wiring diagram...take your time.. you CAN figure it out!!!

[PDF]GRIZZLY 450 YFM45FGX OWNER'S MANUAL - Yamaha

www.yamaha-motor.com/.../lit-11626-21-46_griz... Yamaha Motor CompanyThis ATV should not be ridden by anyone under 16 years of age. ... Product and specifications are subject to change without notice. ...... Recoil starter. 4. Throttle ...

Grizzly 125 stalls in reverse - Yamaha Grizzly ATV Forum

www.grizzlycentral.com > ... > Grizzly Engine & Transmission
Oct 18, 2013 - 13 posts My dad just bought a 125 and it stalls the instant u pit it in reverse. ... electrical sensor that will kill the engine if the brake isnt depressed when u go into reverse. so now i need to ..... yamaha grizzly 125 dies when put in reverse.

Grizzly 660 Shifting problem. - Yamaha Grizzly ATV Forum

www.grizzlycentral.com > ... > Grizzly Engine & TransmissionMar 12, 2012 - 4 posts This is a discussion on Grizzly 660 Shifting problem. within the Grizzly Engine ....2005 grizzly 660 gear position sensor problem.

check fuel flow and check spark at spark plugs

According to an "ATV Rider" 2009 article, "When the Grizzly was introduced in 1998 as a 600cc machine, the top was blown right off the displacement wars of the time."
It was replaced in 2002 with Yamaha Grizzly 660, an even bigger engine derived from the well-established all-terrain vehicle (ATV) Yamaha Raptor 660R.
Grizzly's 660 cubic centimeter (cc), four-stroke, liquid-cooled single overhead camshaft, five-valve engine performs well in open country, but sometimes it causes serious problems for owners.
Before you call a Grizzly dealer, however, trying a few tricks in your garage can save you a lot of time and money.

Check the fuel level.
Locate the fuel meter indicator on top of the multifunction display.
If it does not work properly, open the fuel tank, and push the Yamaha 660 Grizzly side to side.
Ensure the fuel is not contaminated by water or rust.
If you have not driven your Grizzly 660 for a long time, drain the tank completely, and fill it with a fuel tank cleaner.

Check fuel hoses for cracks or leakage.
The hoses should be soft and simple to bend.
Replace those that show any sign of wear.

Check the compression.
Screw a compression tester into the spark plug hole, and press the electric starter button.
If no compression exists, contact a Yamaha dealer.
Wipe wet or dirty electrodes with a dry cloth.
The spark plug gap should be checked regularly

Correct the spark plug gap.
Measure the gap with a wire thickness gauge.
If necessary, adjust it to 0.8mm using a screwdriver or replace the spark plug.
Use only a Yamaha-specified spark plug.

Check the Yamaha 660 Grizzly's battery.
Operate its electric starter.
If the Grizzly starts quickly, then its battery is in good condition.
If the engine turns slowly, check the battery lead connections, and you may need to change the battery.
If the engine still does not eventually start, your Grizzly is beyond home repair.

It normally means check engine like a check engine light.

Yamaha Grizzly 660 2002 2008

get one of these..If you are going to try the repair yourself....
.this is serious, ....
there MIGHT be damaged components that need to be inspected by a professional.