Yep that's the one.
Just a little FYI on the Polaris CFI Engine and surrounding rumors
- Thread starter RK Tek
- Start date
Yep that's the one.
prairie-rider800
Active VIP Member
Figured some people might like to see this....
Here is a set of Pistons out my stock 2013 Pro Rmk 800 with 1400 miles (at least half or more in mountains).
Here is a set of Pistons out my stock 2013 Pro Rmk 800 with 1400 miles (at least half or more in mountains).
BILTIT
Active VIP Member
For those looking at the doo bypass t-stat i will weigh in my experience. I run the terra-alps aluminum housing bypass t-stat (very similar to the doo setup but larger t-stat) and it definately runs much cooler.
In anything over 2" of powder it will run 115F all day long, helps run cooler longer when i am on the trails/hard snow here at home too. I think it is a very good upgrade for these machines.
It warms up faster and will not get hot just sitting and idling, the cold shot is reduced when stuck or sitting for periods of time too.
In anything over 2" of powder it will run 115F all day long, helps run cooler longer when i am on the trails/hard snow here at home too. I think it is a very good upgrade for these machines.
It warms up faster and will not get hot just sitting and idling, the cold shot is reduced when stuck or sitting for periods of time too.
ditch1000
Active member
X2. I 've been running this bypass thermostat for the last 2 seasons... 1st thing I would do if I was buying a new PRO!!
gdhillon
Active VIP Member
prairie rider those look pretty good dont they?....im no expert on pistons
Did all the 13s have jackshaft issues?
Did all the 13s have jackshaft issues?
prairie-rider800
Active VIP Member
Im no expert either but I thought they looked great! Everybody posts when they have problems but not to often people post when things are good. So I figured I'd post some positives!.... No I don't think since the update many people have had issues. They are using the same jack shafts in the 14s and I believe the 15s too.
- Thread starter
- #227
RK Tek
Active member
Please measure the SKIRT of both pistons.. THIS SKIRT AREA is where the issues lie.. You can not "look" at a piston and tell its dimensions..
Compression checks tell you nothing about the health of the skirt.. Neither does a visual inspection..
Only a precise measurement of the skirt area will tell you the state of health of the piston..
prairie-rider800
Active VIP Member
ok thanks for the info! That's good to know. I would measure them and post the results but I do not have a micrometer. I had to have the dealership check clearance on the new ones.
prairie-rider800
Active VIP Member
Thats what I was wondering aswell. They seem pretty minor though. You can't feel them to the touch... Maybe it wasn't warmed up quite enough once?
I was thinking that or a poorly sealed intake... Would like to hear from the experts on that though.
CatRyder88
Active VIP Member
Well those aren't the greatest pistons. Tops look ok but scuffing on the side says it may not have been warmed up enough. Im no expert but you may want to check compression. Maybe some water got into the engine.
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