I have older Suzuki ATV 2wd. It won't start, the

check that the actuator is releasing all the way

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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Sounds more like a battery supply or starter issue. Check the battery voltage - it should be 12.1 volts. If it is then check the battery and starter connections. Put a voltmeter on the battery and see what the voltage drops to when you try to start it. If it drops below 8 volts then the starter is drawing to much. Hope this helps

ATV Answerman on ATV amp UTV Tech Questions: Off ...

www.off-road.com/atv/atv-answerman-on-atv-utv-tech-questions-53357....

Nov 30, 2011 - I have got a 2005 arctic cat 650v twin starts very good at idle good but when ... Each year varies and although some machines never change it would be ... A flooded ATV will be rough at idle and have a telltale smokey exhaust. .... with and without the 4x4 engaged it seems to be stuck in awd but the front left ..

ATV won't stay running - ATVs & Snowmobiles ' In-Depth Outdoors

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Jan 19, 2011 - 27 posts - ‎18 authors
I know, this isn't the ATV forum, but I'm hoping maybe one of the mechanical ... it is a bear , but when she starts I have to keep the throttle pressed.If I turn up the idle so she Idle's about 20 seconds later the Idle Is at about 2000 ...Missing: awd

Joseph, Check the attached links, Good luck with your Bike
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
http://www.carlsalter.com/motorcycle-manuals.asp
ATV Motorcycle Repair Manuals Repair Manuals Online
What to do When Your Motorcycle Won Start

should be mounted in gear box, not going to be an easy repair.

I'm afraid that whatever was the problem a long time ago has finally broken and you will have to open the case to find out what has happened. When was the last time you checked and or changed the oil and will rocking it back and forth move it out of gear?

hi....
the two 2 most common issues seem to be:
(1) the wire breaks off on the outside or is pinched by the sprocket cover, or
(2) the copper contact piece on the end of the gear selector in the tranny breaks off its tab that holds it in place and stays touching (grounding out) the Neutral wire.
thank you....hope this helps you.....good luck...

try replacing your rectifire becuase that is what charges the battery