Have a grizzly 350 only about 30 hrs. Pushed the start button the green light went out and nothing since. No starter click, nothing. Checked battery and it is 12volt good

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"

Did you check the starter button. Look to see if it has power then check the wire going to the solenoid and see if it is sending power.

If you look at the picture - 29, 30 & 31 are the starter relay, main fuse and probably the bolt that holds it to the frame. When that fuse blows or that relay goes out - it's over. Not going to start. If you have a standard test light - attach the clip end to ground (frame of atv) and then put touch the postivie post of the battery to verify that the light is functional. It will light up if the battery is good. Next -follow the red cable to the starter relay in the diagram. Where it attaches - check for power. With the key off. IT should be live without the key in. It's on standby in a way. If you do not have power at the other end of your positive cable - your cable is shot. If you do - then you will have someone turn the key and check to see if power is coming from the other post off the relay (that would go to the starter and make it engage - if the square standard fuse in that relay is not blown - but power is not coming through when you touch the key - it's probably the relay. Your safety switch among other things can prevent the engine from starting as well - along with loose cables and grounds (always do a thorough check of all wire connections and grounds - one loose ground can mean a nightmare sometimes) - if you give that a try and do not identify the culprit - just comment or reach out and I'll take you through the next steps. All The Best, Justin Lee, 17 South Industries, LLC


Here's a copy with 29, 30 & 31 Link will take you to page as well*


2003 Yamaha GRIZZLY 660 YFM660FR Parts


Your starter relay -


4SV 81940 12 00

Can you street quad manually? Check to see if you have voltage at the starter. If no work your way back to battery. Just maybe a fuse blown.

the solenoid for the ignition and starter has failed. Also remember the brake has to be applied to activate the starter system.

Did you try pushing in brake are clutch? and have you checked to make sure fuses are not blown.

is the battery good .may need a new one.could be a bad spot on ring gear. let me know may be able to help you more

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.

sounds like a bad battery