Take it to the dealer and get new pistions installed. That piston will only get worse, there is obvously a problem. I've locked a motor 30 miles out an in wilderness area. It isn't something that I wish on anybody.
2010 dragon 800 w/50 miles piston pics
- Thread starter Hooker
- Start date
Pistons
Them are fine put it toghether and it will run a long time!
Them are fine put it toghether and it will run a long time!
Not sure what oil you were running for breakin but here's my thought to tie these two thread topics together. If there are no grooves there which it looks like theres not, what we may be seeing in this and many other cases is the differences in the break-ins on these motors. Some claim that the synthetics are no good for break in, dino is better then switch. Some say hoax, etc. Perhaps the longer the break-in window, the more the blow by gases are taking off this coating where in some break-in scenarios where the ring seal happens much quicker there is much less or none of this coating removal. I've seen pics of just about every degree of this on the many threads around here. If the coating is gone but the piston is not scored I'm guessing you're well with-in any wear spec and would still get good performance overall.
Like many things these days I'm thinking the amount of info share from forums and other things like this bring much of this to light and help us understand all this better. It hasn't been that long that coated pistons have been used by OEM's so this would not be as obvious in days gone by. Not saying there isn't motor issues in these Polaris engines but you can't broad brush all these things into once cause necessarily.
In my mind I think this is where the break-in evidence is showing up.
Like many things these days I'm thinking the amount of info share from forums and other things like this bring much of this to light and help us understand all this better. It hasn't been that long that coated pistons have been used by OEM's so this would not be as obvious in days gone by. Not saying there isn't motor issues in these Polaris engines but you can't broad brush all these things into once cause necessarily.
In my mind I think this is where the break-in evidence is showing up.
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Those pics look like the coating is coming off. Spend the hour and look at the cylinders.
D
deepdiver
Well-known member
Interesting hypothesis,
I am anal about proper breakin...I also had a my D8 in the shop for two months last year. My riding partner is helllla hard on all machines. He is one big boy and has a belief that break it in like you are going to ride it..he hammers the heck out of it..doesnt have near the warmup times I have etc..get where I am coming from? When his was updated the pistons had zero scoring..it just aint fair.
Bobnoxious would tell me quit beeing a poose and ride it like you stole it..its in warranty who cares! He doesnt even use oil in the tank with a new sled anymore either. His 900 didnt have any issues either other than no snow the year he bought it and no resale value on trade in .
It is a mystery thats for sure..maybe the breakin is over rated...
Certainly this is a complicated subject with many factors involved. Personally I have always been very diligent in my warm up process but beyond that I do not baby my new motors. Not saying I abuse them at all, just don't baby them. The most recent experience was with my 900 where I put a fresh top end in with the 06 piston update. I followed my normal routine and did this break in with synthetic polaris oil in the res, no extra oil in the fuel. After about four rides I had the top end off again for a crank failure and saw a similar result to this thread, wear in the coating just below the crown and ring land on the exhaust side but no scoring of any kind. 130psi on both sides after reassembly and I have no concerns about this motor.
Here is a site with some interesting points that have added to my thoughts on this whole subject. Not sure I agree or disagree yet, just more info that a guy draws on when you look at all this a little closer.
http://www.mototuneusa.com/break_in_secrets.htm
This is more to do with the procedure than anything else but I am tending to believe the oil choice factors in here as well.
Here is a site with some interesting points that have added to my thoughts on this whole subject. Not sure I agree or disagree yet, just more info that a guy draws on when you look at all this a little closer.
http://www.mototuneusa.com/break_in_secrets.htm
This is more to do with the procedure than anything else but I am tending to believe the oil choice factors in here as well.
2 years to develop fix?
It is pretty unimpressive that with all the R & D in this "fix" that polaris cant use a higher quality coated piston. I wish I could have KTM build me a set of 800 cfi pistons, I flog the shi# out of those austrian motors and the pistons amaze me every time one is apart. Does anyone know of a quality aftermarket dual ring piston for these? I am going to replace my pistons, but have no use for the new mapping or low performance head. Good luck!
It is pretty unimpressive that with all the R & D in this "fix" that polaris cant use a higher quality coated piston. I wish I could have KTM build me a set of 800 cfi pistons, I flog the shi# out of those austrian motors and the pistons amaze me every time one is apart. Does anyone know of a quality aftermarket dual ring piston for these? I am going to replace my pistons, but have no use for the new mapping or low performance head. Good luck!
I was gonna suggest Weisco, but they only go to 2004 for Polaris... maybe you can call them on Monday to see when/if they're gonna carry 'em.
-Jeff
-Jeff
I hear, see a lot of people complain about the remap and low performance head, I have an 09 D8 that always ran flawless and when they took it apart for the recall looked brand new inside, I have changed nothing else other than the new update and even with the break in oil still in the tank it pulls 100 more rpms than it did before. I also run from 9 to 11 thousand feet ele. So I am not convinced that it is a low performance update, just my .02
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