Rear rotor cracked only 650 miles - Polaris ATV Forum
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post #1 of 12 (permalink) Old 08-16-2019, 03:14 PM Thread Starter
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Rear rotor cracked only 650 miles

My rear rotor has a huge crack in in all the way through about an 1/8in gap at the end. I only have 650 miles on the atv and tend to use my front brakes more often. How is this a thing? dealer said it would be $80 for the part. Is there somewhere better to get one not so costly? Especially if there should be no reason for this to happen.
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Last edited by skyler; 08-16-2019 at 03:16 PM.
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post #2 of 12 (permalink) Old 08-16-2019, 03:41 PM
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The dealer can give you a break on the cost if they choose to. I had cracks in the rear bearing carriers on my 2016 1000 Touring. They were right around $80 each, they sold them to me for $62 each. I had 780'ish miles on it at the time. My cracks were not near as large as yours.

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post #3 of 12 (permalink) Old 08-16-2019, 04:14 PM
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That's no defect there something contacted that rotor to do that damage!!
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2011 Sportsman® 800 EFI
GURU front brush guard
GURU rear brush guard
Polaris front lock n ride cargo box
Polaris rear rack extender
Warn RT 3.0 winch w/amsteel synthetic line
Viper aluminum haus fairlead
Polaris front spring adjusters
Ricochet a-arm guards
Ricochet full frame skid plate
ITP T-7 beadlock 14" w/OMF inner rim guards
Maxxis big horn 2.0 26x9 front
Maxxis big horn 2.0 26x11 rear
QSC clutch kit
EPI HD springs front n rear
ODI rogue 130mm grips
Ultraseal commercial grade tire sealant (front)
Highlifter tire sealant (rear)
CTEK 3300 battery maintainer
added 7 zerks
beefed up wiring harness
OGIO rear bag
ROTOPAX 1gal. + 2gal. gasoline can
Jccapri bushing kit
Kolpin Over Fenders
Rigid Industries E-Series 10" flood
Walker Evans struts
NGK Iridium's (2,500 miles on Champion's and they looked great!)
Odyssey Extreme battery PC545

2018 Sportsman® 570-T
2019 Aluma® A8818
2020 Outlander® 1000R XXC (on order, ETA mid-Sept)
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post #4 of 12 (permalink) Old 08-17-2019, 12:30 PM Thread Starter
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I don't see how something could of hit that. I trail ride only. I don't rock climb with it or that rough on it at all. Its only a 450 so theres not much I can do anyways.
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post #5 of 12 (permalink) Old 08-17-2019, 04:07 PM
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Well sh!t happens I mean it is in the realm of possibilities it's a manufacturing defect. I'm betting a rock got caught up in there. Either way you cut it sux. But like they say you gotta pay to play!!

2011 Sportsman® 800 EFI
GURU front brush guard
GURU rear brush guard
Polaris front lock n ride cargo box
Polaris rear rack extender
Warn RT 3.0 winch w/amsteel synthetic line
Viper aluminum haus fairlead
Polaris front spring adjusters
Ricochet a-arm guards
Ricochet full frame skid plate
ITP T-7 beadlock 14" w/OMF inner rim guards
Maxxis big horn 2.0 26x9 front
Maxxis big horn 2.0 26x11 rear
QSC clutch kit
EPI HD springs front n rear
ODI rogue 130mm grips
Ultraseal commercial grade tire sealant (front)
Highlifter tire sealant (rear)
CTEK 3300 battery maintainer
added 7 zerks
beefed up wiring harness
OGIO rear bag
ROTOPAX 1gal. + 2gal. gasoline can
Jccapri bushing kit
Kolpin Over Fenders
Rigid Industries E-Series 10" flood
Walker Evans struts
NGK Iridium's (2,500 miles on Champion's and they looked great!)
Odyssey Extreme battery PC545

2018 Sportsman® 570-T
2019 Aluma® A8818
2020 Outlander® 1000R XXC (on order, ETA mid-Sept)
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post #6 of 12 (permalink) Old 08-18-2019, 06:25 AM
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Garage
Try atvpc.com I got one for my 570 for Around 25$
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post #7 of 12 (permalink) Old 08-18-2019, 07:57 AM
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If I were guessing...and I am...I'd say that caliper was either adjusted too tight and has been dragging or someone inadvertently had their foot on it and the disc was red hot when it hit water instantly chilling the disc causing it to crack... But that's just a guess. I've never seen one break that way.
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post #8 of 12 (permalink) Old 08-18-2019, 03:54 PM
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BTW if you use the handlebar brake lever it operates both front and rear brakes. The pedal in the right footwell only operates the rear.

650 miles seems low for a failure like that but stuff does happen. Bite the bullet, buy the rotor and change it out. Not that tough. I would avoid the really cheap parts though. You have no idea where they come from (well probably China). Along with questionable quality. Either get a Polaris part or one from a known aftermarket company.

Mine: 2018 Sportsman 850SP - 26" Bear Claw HTRs on OEM steel wheels(I really don't like the Aluminum ones)
Polaris Hand warmers, Mirrors.
Hers: 2019 Sportsman 450. 26" Bear Claw HTRs on Moose 427X Wheels.

2007 Sportsman 500 EFI, Polaris Winch, 25" Bear Claws QSC Clutch Kit, Hand Warmers
2001 Magnum 325 MOSE 12" rear wheel conversion. 25" Sedona Coyote tires
2017 Polaris Ranger 1000XP - Roof and front glass
2018 Kawasaki KLR650
2001 Magnum 325 Warn winch and Moose 60" plow-Sent to Daughter and Son-In-Law since his blew up
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post #9 of 12 (permalink) Old 08-18-2019, 03:58 PM
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!!!!!! Don't WASTE your money on inferior parts. I use OEM or a reputable aftermarket manufacturer.

2011 Sportsman® 800 EFI
GURU front brush guard
GURU rear brush guard
Polaris front lock n ride cargo box
Polaris rear rack extender
Warn RT 3.0 winch w/amsteel synthetic line
Viper aluminum haus fairlead
Polaris front spring adjusters
Ricochet a-arm guards
Ricochet full frame skid plate
ITP T-7 beadlock 14" w/OMF inner rim guards
Maxxis big horn 2.0 26x9 front
Maxxis big horn 2.0 26x11 rear
QSC clutch kit
EPI HD springs front n rear
ODI rogue 130mm grips
Ultraseal commercial grade tire sealant (front)
Highlifter tire sealant (rear)
CTEK 3300 battery maintainer
added 7 zerks
beefed up wiring harness
OGIO rear bag
ROTOPAX 1gal. + 2gal. gasoline can
Jccapri bushing kit
Kolpin Over Fenders
Rigid Industries E-Series 10" flood
Walker Evans struts
NGK Iridium's (2,500 miles on Champion's and they looked great!)
Odyssey Extreme battery PC545

2018 Sportsman® 570-T
2019 Aluma® A8818
2020 Outlander® 1000R XXC (on order, ETA mid-Sept)
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post #10 of 12 (permalink) Old 08-24-2019, 10:38 AM Thread Starter
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Ended up getting a good will warranty for new parts but still have to pay for labor.
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