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05-03-2010, 06:58 PM
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Junior Member
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Member #4692
Join Date: May 2010
Location: U.S.A.
Posts: 10
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2010 850xp Engine Noise
New to the site and was hoping for some input.
A few days ago I made the move from Bombardier to Polaris.
I love the machine but am worried about the way the engine sounds.
Almost sounds like loose lifters at an idle then at higher R's has that faint sound you hear with worn crank bearings.
Then when you shut it down there's a rattle in the engine.
The dealer says these are normal noises with the 850's, Does anyone else hear these noises with your machines?
Thanks
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05-03-2010, 07:02 PM
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ATV Enthusiast
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Member #4470
Join Date: Apr 2010
Posts: 84
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I got some noise at lower speeds that sounds like valves chattering. Ask the dealer about it and said it was normal and others do it. 4 valves per cylinder.
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2010 camo 850 xp
Last edited by cvjoint; 05-03-2010 at 07:10 PM.
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05-03-2010, 07:14 PM
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Junior Member
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Member #4692
Join Date: May 2010
Location: U.S.A.
Posts: 10
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Quote:
Originally Posted by cvjoint
I got some noise at lower speeds that sounds like valves chattering. Ask the dealer about it and said it was normal and others do it. 4 valves per cylinder.
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Thanks cv 
I've even went and looked up videos of these and did notice they all seem to have that issue.
Pretty annoying but hopefully I'll get used to it, Maybe an aftermarket exhaust can drown it out.
And if it does end up being an issue I guess I'll just deal with it then, I did grab the 5 yr extended warranty, Hopefully they wont give me the runaround if it becomes necessary.
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2010 Stealth Black 850XP w/EPS, Front and Rear Brush Guards, PIAA Lights, 3,500 Front Winch, 2,500 Rear Winch, Lock n Ride Front Cargo Box, Rear Rack Extender, Alum CV Guards, Hand and Thumb Warmers, 5' Glacier Plow.
2000 DS650, Full Big Gun Exhaust, Stage 3,
Last edited by 850 xp; 05-03-2010 at 08:06 PM.
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05-04-2010, 03:05 PM
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Polaris ATV Junkie!
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Member #962
Join Date: Jul 2009
Location: Lockport, Louisiana
Posts: 531
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No sound's like that coming from my engine. Smooth for a large bore twin
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2009 Polaris XP-850 w/EPS and 2500# Polaris winch, Lock and ride front cargo box, Front and rear rack extender's, Stealth Black, 27" Mudlite XTR's, Polaris deluxe brushguard's,XPOG #2 
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05-06-2010, 04:29 AM
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Junior Member
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Member #4030
Join Date: Apr 2010
Location: Arkansas
Posts: 22
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mine sounds like my dirt race car with the valve lash set loose....hopefully it want be a problem... 
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06-01-2010, 01:35 PM
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Junior Member
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Member #5105
Join Date: May 2010
Location: st Johns
Posts: 8
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Even from our dealership from prep to the showroom floor these models have that Noisy Engines! Then again that is alot of power to be to quiet~! lol
__________________
Robert Blackwell
It Director
Us27 Motorsports & Trailers
5301 N US127 Hwy
St Johns,Michigan,48879
www.us27motorsports.com
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06-01-2010, 02:41 PM
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Extreme ATV Enthusiast
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Member #3783
Join Date: Mar 2010
Location: Jamestown, NC
Posts: 123
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Mine is very quiet. Only 230 miles.
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Boilermaker
2010 850 Touring, ATV-Guru Cobra bumpers
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06-19-2011, 09:05 AM
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Junior Member
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Member #14507
Join Date: Apr 2011
Location: Karis / Finland / EU
Posts: 9
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I've to ask, R U sure it's coming from the engine? I've a similar noise, and when listening with a long screwdriver I located it to the tranny. When I shut the engine off I can here the same rattle. When revving it up to about 1800rpm's the noise is compleatly gone! Could it be the flexplate?
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06-19-2011, 09:17 AM
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Extreme ATV Enthusiast
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Member #14566
Join Date: Apr 2011
Location: nw pennsylvania
Posts: 256
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IMO, my 2011 is the quitest polaris i've ever owned. It has the usual cluck in driveline that there famous for. When I bought my frist polaris in 01, I thought it was gonna blow up or break everytime I rode it. I have 9000 miles on that 01 500 ho and never have done anything but chane oil and put gas in it. Changed belt twice. I have 700 miles on 850 and I think it is almost to quite fo the power they create.
__________________
2011 850 XP pursuit camo
26" Sedona Ripsaw Tires
Lock and ride front box
QuadBoss rear box
2001 500 HO
26" Mudlite XTR's
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01-04-2012, 06:26 PM
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Junior Member
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Member #21812
Join Date: Dec 2011
Location: shullsburg wi.
Posts: 18
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my xp 850 engine was quiet for 3400 miles then main bearings went out. crank was walking in block , flywheel was rubbing on oil pump cover. mine sounded like wrist pin knocking when i tore it apart. slyder01 had same problem.
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