Grizzly 350 runs fine in neutral and reverse but when put in forward it sputters and dies. Starts right back up but won't run in forward. Any ideas?

you have a reverse safety like on riding mowers with deck engaged push and hold reverser button this link showes where and how it works --against bypassing a safety only video that showes the safety clearly 1995 Polaris Magnum 425 ATV Others Disable Reverse Override Function

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!!!

I'd check the shifter first. sounds like it needs calibrated.

possible that the fuel tank is not venting properly

Sounds like your idle/slow speed carb circuit is plugged. A carb cleaning and spraying all passageways with aerosol carb cleaner should find your lost idle

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.

Assuming your diagnosis is good, how about the fuel filter and/or fuel pump?

Check to make sure your main earth from the Neg side of battery is connected to the engine and NOT the FRAME.

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