Lost Power After Trying Winch - Yamaha Grizzly ATV Forum
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post #1 of 4 Old 09-09-2019, 09:29 PM Thread Starter
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Lost Power After Trying Winch

I just bought a used 2007 450 grizz. I test drove it at guys house and it ran great and I took it home. I brought it to brothers and we were looking at it and I tried the winch while machine was running. It winched out but as soon as I tried to winch in the machine shut completely off and everything died. I turned the key off and on and nothing. I pullstarted it and the dash said I was going 8 mph and jumping all over when I wasn't moving. I put it in reverse and it sputtered and backfired. I drove it down the road to my house and the reverse light was flashing. I'm new to owning an atv this is my first. Is it most likely a bad battery? Any help would be much appreciated.
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post #2 of 4 Old 09-10-2019, 08:49 AM
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It would be worth investigating the battery AND the stator/regulator.

Using the winch on a bad battery would act like that... but if the machine is running and the winch isn't, the stator SHOULD provide enough current for everything to work fine. It's possible the stator and/or regulator are bad, and he just had the battery nice and topped off to keep it running while he sold it.

2009 Grizzly EFI EPS - 26" Bearclaw HTR tires - 1"/1.5" wheel spacers - Warn 2500lb winch - 30" + 12" light bars - EPI purple spring - 1.5mm primary shim
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post #3 of 4 Old 09-10-2019, 09:14 AM
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That's nice pick up. Why don't you share some pictures of it? I am much excited to see.
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post #4 of 4 Old 09-10-2019, 09:44 PM
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I would check voltage on battery, maybe start with a new battery or a borrowed one.


2014 Grizzly 550 EPS, Richochet Full Set Skids, Fender Flares, Yamaha front Brush Guard, Moose Rear Bumper, Front and Rear cargo Box, Icom 2980 Ham Radio & 12 volt lithium battery in front box

2015 Grizzly 700 Eps, Warn Winch, Richochet full plate skids, OEM Hand Guards, Rigid Duallies, Fender Flares, ITP rims, 26 Bighorns, 1.5 mm shim (Ridgway Install)

2010 Yamaha Grizzly 700 FI EPS
My Sons: 29.5 laws or 27" Bighorns, SS12 ITP Rims, Richochet Full Set Skids, performance Snorkels, 1.5mm shim, Yamaha Brush Bumper, Moose rear bumper, Epi clutch kit, ATV nerf bars, Warn winch.

2009 Yamaha Grizzly 700 FI EPS Yamaha skid plates, Yamaha hand guard, Yamaha Brush bumper, Moose fender flares, ATV Nerf Bars, EPI Clutch Kit, Rigid Duallies, 1mm shim, Moose GPS Finger Grip mount, Garmin GPS, Warn winch, Performance Snorkles, 27" Bighorns, SS12 ITP Platinum rims.
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