Sled siezed 1/2 mile down the trail...help

[rmk 700]

sled seized today half mile down the trail head. got the track to spin backwards and it unsiezed. Locked up one more time so towed it back to the truck. Got the sled to unsieze and fire up, rode it up the sled deck and shut it off. Any ideas of whats wrong? really weird how it will lock up then free up.
Any help will be appreciated

 

[rmk 700]

Sled is a 2011 Polaris pro 800 with a fix it kit

 

[04proxr800]

Probably cold seize, once it cools it let's go but scuffs the pistons

 

[ullose272]

what fix kit? pull the head off and take a look.

 

[rmk 700]

unloaded the sled at 105 degrees..... at 123 degrees it did this.
Mtntek kit

 

[rmkboxer]

if you spin the track backwards that shouldn't even do anything to the engine, so did the engine lock up or something else? if it is the engine it is probably oil. I have found issues with the oil caps on these things. look at your oil line coming off of the oil tank if it has a big air bubble pull the line off but do not take the the cap off. if it does not run out your cap is bad

 

[rmk 700]

motor was completely locked up. Ill check that out. Thanks man

 

[ullose272]

My 14 usually has that air bubble. It uses oil just fine. I figure its under warrenty.but its alway used oil

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[ullose272]

I thought mtntek recomended a ecu reflash, no?

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[mtncat1]

if you were just running down the road It was probably a cold seize. like stated above. but it is possible you have a crank bearing going out. if there is no damage to the cylinders or pistons you will need to check the crank. it's also a good idea to check your injectors while your in it.

 

[rmk 700]

I'm thinking it's a crank bearing or somthing as well. We will see tomorrow

 

[Rmk_RDR]

FYI polaris oil caps have a big issue if you are side hilling the ball in the cap will cut off venting and not let oil into your motor. If you take your cap off and tip it alittle to where the ball moves that's how far you can tip your sled on a side hill. I've fixed this by using the rk tek oil cap it works very well and is a billet cover so no more cross threading