overheated on the trail

[dallasmench]

so my buddy knocked out his cooler on the trail with about 200 km on his 2008 rev 800 and it got written off. we bought it back and want to rebuild it but not sure where to start. turns over and has about 100 psi in each piston. im thinking just needs rings but dont want to blow it up on the first ride after fixing it. Need some help, any ideas

 

[mxz sledhead]

was the motor seized if want to do top end it not huge job its just over $600
for piston and seals to make the a job little easier buy a pin puller and eclip
installer those eclips are bit.. that about $100 is body damaged? that a little more work but not impossible.

 

[team dirt]

which cooler, check cylinders for scuffing, if they arent to bad you should be able to hone, if real bad you will need to renikasil. if you need to renikasil i would think about an 860 kit.

 

[Modman]

??? 08 sled worth ~$7500 and they wrote it off for a $3000 motor??

Doesn't make sense at all.

If he overheated and seized the motor then you can expect a full rebuild, you can have scorched seals in the bottom end, you need to fully rebuild the whole motor from the ground up because the water pump could be trashed and the seals in there might be fawked. Also make sure everything is within spec and no parts or peices got down into the crank.