850XP One-Way Clutch Bearing - Polaris ATV Forum
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post #1 of 10 (permalink) Old 10-08-2019, 05:17 AM Thread Starter
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Question 850XP One-Way Clutch Bearing

Can anyone describe what a failing one-way bearing might sound like? Or do they just completely fail?

2015 Sportsman 850 in Sage Green
3500 lb. Polaris HD Winch
QSC Clutch Kit (from Ryan @ RVS Performance)
Odyssey PC925L-P Power Sports Battery
VIPair Windshield w/mirrors
HD ATV Gear Billet Pinion Cover
EPI HD Springs, Front & Rear
Cecco Frame Braces
27X9 and 27X11-14 STI Rocktane XD Rubber
Guru Bumpers, Front & Rear
Lock 'n Ride Front & Rear Boxes
Rhino Monster, Rear Box
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post #2 of 10 (permalink) Old 10-08-2019, 05:19 AM
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Good question!!! I would also like to know the scenarios and symptoms of a failing one way bearing.

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 #3 of 10 (permalink) Old 10-08-2019, 05:36 AM
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Gets really hard to shift. Creeps forward at idle while in gear. When it gets worse, you have to turn off the engine to shift. When the bearing fully seizes to the shaft, the belt burns and the seals melt on the bearing and you get smoke coming out from under the seat.

D
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post #4 of 10 (permalink) Old 10-08-2019, 05:53 AM
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If you do a lot of really slow riding with big rocks and and tree to go over, the one way takes a real beating. At around 7 mph the clutch faces close on the belt and lift it off the one way. When you drop down below that by letting off the throttle, it engages the one way. Then when you touch the throttle it comes off the one way again.

In slow rocky trail the one way engages and dis engages many many times a ride. It wears out fast in this type of riding. If you are riding open trail, or logging roads above 10 MPH the one way never engages and will last for lots of miles.

I have never gotten more than 1000 mile on a one way. I leave the one-way in until it seizes or gets hard to shift and then change them out to a two-way from a scrambler. I have never had a two way wear out. It eliminates EBS and makes your sportsman ride like a scrambler.
I like it better but everyone has there own preference.

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post #5 of 10 (permalink) Old 10-08-2019, 06:12 AM
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Oh sh!t it sounds like my one way on the 570-T is on its way out. Just about 1,000 miles on it and has those symptoms. Those 1,000 miles have been slower type rocky/crawly terrain. I thinking I will need a two-way bearing off a 570. I'll have to do some investigating as to any differences in clutches. If the clutches are the same I will swap the one-way for a two-way. If not I'll just replace the one-way.

I do notice the steeper longer decends where the EBS is really working the bearing will squeal and shifting becomes harder.

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 10 (permalink) Old 10-08-2019, 06:47 AM
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The secondary will be a different part number. It makes no difference. The EBS secondary works fine with a non-EBS primary. The only difference in the primary between EBS and NON-EBS is the one way bearing or a plain needle bearing.
This is what I use, but it may be different for a 570.
https://www.ebay.com/itm/2010-2019-P...ss!59701!US!-1

D

Last edited by Deucer; 10-08-2019 at 06:51 AM. Reason: Wrong link
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post #7 of 10 (permalink) Old 10-08-2019, 07:06 AM
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https://www.ebay.com/itm/3514609-PRI...0AAOSw~NRdXa5b

I am not a 570 rider but this looks like what you need.

D
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post #8 of 10 (permalink) Old 10-08-2019, 07:30 AM
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Ok cool thanks for the info Deucer !!

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)
bp405 is offline  
post #9 of 10 (permalink) Old 10-08-2019, 02:49 PM Thread Starter
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Thanks Deucer, I think i'm seeing early stages of that bearing failure. I do a lot of slow, rocky, tight trails; on and off the throttle at under 10mph constantly. Think I will plan on replacing it, and the belt.

2015 Sportsman 850 in Sage Green
3500 lb. Polaris HD Winch
QSC Clutch Kit (from Ryan @ RVS Performance)
Odyssey PC925L-P Power Sports Battery
VIPair Windshield w/mirrors
HD ATV Gear Billet Pinion Cover
EPI HD Springs, Front & Rear
Cecco Frame Braces
27X9 and 27X11-14 STI Rocktane XD Rubber
Guru Bumpers, Front & Rear
Lock 'n Ride Front & Rear Boxes
Rhino Monster, Rear Box
Camoplast Tatou 4s Track System
Heated Grips and Throttle Control
Lowrance BAJA 540 GPS
SuperATV EZSteer 380
Various Mods for Ice-Fishing
phil is offline  
post #10 of 10 (permalink) Old 10-09-2019, 05:34 AM
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Belt is kind of a given when the one way goes out. It chews up the inside face of the belt. If you catch it early, the belt still may be useable.
I put back on a belt on my 1000 that was pretty questionable and it has been working fine. The sides were still in good shape but the "gogs" on the inside were pretty bad. I was installing a two way so the grip on the cog side was of no concern to me.

If you reinstall a one-way, the cog face is more important.

D
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