Heres what my pistons out of my 2014 pro look like after 500 miles, add oil to the gas and turned the oiler up. Put the bikeman durability kit in and I'm glad I did. Polaris really needs to get there engines figured out.
What my pistons look like after 500miles
- Thread starter Braaap12
- Start date
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Wow! Dang !
Wow! Dang !
Looks fairly normal to me.
Not seeing the problem.
Not seeing the problem.
yes, normal if you have a dragon 800....
What's the exhaust port side look like?
S
snowmobiler
Well-known member
If thats normal,i dont want one.LOL.
Piston was rocking in the bore front to back. The wear on the top of the piston shows it. Also notice that the rings don't have one, large, shiny square surface across their faces. There looks to be the one thin shiny face in the center, and two less shiny wear surfaces above and below it that are worn off from when the piston is rocked either direction.
One shot of water ingestion could do that.
rings are convex , meaning when new the wear is ONLY in the center, when worn shiny full top to bottom they have lost their shape and are worn fully.
these look good on the rings but rocking like crazy in the bore..
Its a by product of this semi semi direct injection. not as semi as the SDI doo's but close when in the lower back boost port. this causes a dry environment in the base that is addressed by expanded clearance so not to seize or leave the scoring the doo sdi was so famous for.
e.p.a is one bad mother to get around and still run well. The wossners/ wisecos too work better and fit is tighter. have yet to see one do the old wives tale seize with either piston when running n20 for long periods or turbos at my kinda boost !!
I prefer the longer skirted, cat wossner piston and its hvy webbing. bmp kit. .005 dropped them in and so far so good...
gus
these look good on the rings but rocking like crazy in the bore..
Its a by product of this semi semi direct injection. not as semi as the SDI doo's but close when in the lower back boost port. this causes a dry environment in the base that is addressed by expanded clearance so not to seize or leave the scoring the doo sdi was so famous for.
e.p.a is one bad mother to get around and still run well. The wossners/ wisecos too work better and fit is tighter. have yet to see one do the old wives tale seize with either piston when running n20 for long periods or turbos at my kinda boost !!
I prefer the longer skirted, cat wossner piston and its hvy webbing. bmp kit. .005 dropped them in and so far so good...
gus
Any pics of the cylinders? Measurements?
x2 every sled I've torn down has looked like this. Hell I tore down my 99 XC 700 @ 4000 miles for base gaskets the exhaust side of both pistons were all scuffed, could catch your finger nail on at least a dozen scuffs on each piston and I threw it back together like that, ran the sled until 8500 miles and still sold it with 125 PSI both sides.
What we all are probally wondering- why would you tear down a motor with 500 miles on it- Just asking!
( I would also as to put a MTNTK kit in it) but will void warranty-
So are you going to try to claim this? - it is very evident of the problems that continue to scar out 800 Polaris- the famous banging of the piston in the cyl
( I would also as to put a MTNTK kit in it) but will void warranty-
So are you going to try to claim this? - it is very evident of the problems that continue to scar out 800 Polaris- the famous banging of the piston in the cyl
And people are in a hurry to jump on the NEW 800 HO
--- I will give it a few years--- this is just wrong @ 500 miles, and I have a new 2014 holdover sitting in the crate just waiting on me
S/C
had a local mechanic install the kit for me as I'm not confortable enough to do it on my own, if you look at the pistons themselves you can clearly see where they were rocking in the cylinders. I tried to get the best pic I could. The cylinders and oiling looked fine the mechanic said. Sleds off warrenty this year that's why I replaced the pistons. Hoping the bikeman kit holds up wasn't sure which with kit to go with so I just rolled the dice more or less.
interesting my 11 looked better than that with 1700 miles oil in the tank
oiler untouched ????
a cylinder check might not be a bad idea did they both look like that ?
mine were worn past polaris recomended tolerances but with 1700
hard miles i can't say i wasn't suprised
i always let mine warm up i don't know how that plays in ?
good thing you did it lower ends get spendy
oiler untouched ????
a cylinder check might not be a bad idea did they both look like that ?
mine were worn past polaris recomended tolerances but with 1700
hard miles i can't say i wasn't suprised
i always let mine warm up i don't know how that plays in ?
good thing you did it lower ends get spendy
Disclaimer: I'm really getting tired of another doom and gloom post about the Pro motor.
Another disclaimer: I am no mechanic; I take my sled in for routine checkups at the end of every season...yep, not afraid to admit it.
Sooo...why has no one addressed the above quote from Indy?
And...like sage crusher asked...why did you tear down a motor at 500 miles?
If mechanic said cylinders look fine...what was said about piston and what caused the damage?
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S
snowmobiler
Well-known member
i did LOL a little.
.most 5000 mile pistons that i have seen dont look like that.unless it burnt down.5000 mile skidoo
