Probably because:
1. A wet sump engine is less expensive to build than a dry sump.No extra tank,oil lines,ect.
2. Less complexity
3. Add more storage space in the bed.

 

Pretty much summed it up right there. The cost was the most determining factor. They saw it as the cost outweighed the benefits.

 

The dry sump was notorious for starving muffler bearings of oil. You had better go check yours!

 

Running ATF mixed with canola oil fixed that.

 

cause there getting ready for the new xp that will be useing all the dry sump stuff in jan.

 

probably right lol

 

Go to sealed muffler bearings and save on the cost of the ATF and canola oils!

 

So is my 2012 bad to own?

 

I've installed heavy duty utie bootie exhaust bearings from Satchqauch muffler emporium and not had anymore problems, but they are expensive.

 

Several forum members stated in the above referenced post that their oil lines had came loose.

 

I'm pretty sure Polaris didn't go backwards in switching to the wet sump motor in 2013. If it wasn't good and about moving forward they wouldn't of changed it. As far as power loss there isn't any... People are baggin on the 13' because they don't have one! The 13' has some other benefits also, bigger studs for the wheels, and I'm sure some other stuff too.

 

According to Polaris they changed back to a wet sump because
1) it increased bed space
2) wet sump is easier to service( search oil change questions here..a lot of people apparently had problems with correctly servicing the dry sump)
3) it slightly improved CG ( this one is almost laughable IMO but probably true at least)

 

Have you looked at the new 900 ranger? There is no room under the bed of it for a separate oil tank. I'm sure they switched the rzr over to wet sump just to have more common parts.

 

My local performance shop told me that my '13 dyno'd 2-3 more hp than all the '12's he had done. All stock.

 

Did they use a chassis dyno or a crank dyno???

 

13' = Better and every year they are only gonna get better!!

 

Don't bet on it..ask 2010 sportsman 850 XP owners..2009 had 4 disc brakes..2010..3...there were a few other "disprovements" from the 2009. Don't assume with Polaris that everything about a newer model will be as good as last year..much less better. In my experience they usually improve some things and sometimes go backwards on other things.

 

Chassis Dyno

 

Then as everyone knows those aren't acurate numbers...

Any engine builder that's worth his salt and wants true numbers not propaganda numbers uses a crank dyno... (NASCAR< NHRA< GM< Ford< Chrysler < ETC... All use CRANK DYNO's)

A chassis dyno is used for tuning...

 

If all the variables are the same why wouldn't it be accurate? I don't know... I'm asking. I'm also not arguing one way or the other I'm just telling you want I was told.

 

The CVT Clutch is the unreliable culprit, along with tires... If a chassis dyno was good then all the big names I already listed would use one... They don't use them because they want accurate numbers...

 

I guess everyone should take this with a grain of salt..... out of the countless stock '12's he dyno'd my stock '13 was 2-3 hp more.

 

Your correct...

 

Everybody has their opinions, to each their own I guess...

 

Make it easier for them to put this motor into other models.