Crank bearing cleaning/inspection/greasing

[Onxy]

Just bought a non-running 03 Polaris 700 RMK which had an exploded piston and scored jug. While waiting for a top end kit and new jug to arrive in the mail, I split the crank case to look for pieces of the skirt (located 10).

While I have the case open, is there anything I should replace/inspect/service? Should i try to pack the bearings with Isolflex?

So far I've given the crank assembly a pretty good solvent wash and re-coated the bearings with 2cycle oil. A couple of the bearings had a slight grumble prior to the solvent wash, but the noise went away after I oiled (piston particles infused oil in bearings I assume). I have new seals on the way, but can't really afford to replace bearings unless absolutely necessary.

Sled has 1200 miles. Guessing a leaned out or plugged carb caused the problem. I will be addressing that next.

Any advice/thoughts would be very well received.

 

[garlic bear]

brgs

Make sure you realy wash the brgs good and use air to blow them out check the rod brgs really good. Did a motor and lost a crank on the second day after rebuild due to crap in the rod brg

 

[Woodsrider]

Recommend that while the crank is out you take it to a machine shop and have the bearings and run out checked.

 

[theultrarider]

Recommend that while the crank is out you take it to a machine shop and have the bearings and run out checked.

x2 It'll never be cheaper to get that done than right now. Bite the bullet and do it right the 1st time.

 

[judger101]

yes definately i blew multiple cranks on my old 800 rmk. please do the preventative maintenance now!

 

[whoisthatguy]

While you have the crank case apart, you might want to drill in the omitted oil drip hole that should run from the left side of the PTO piston area, to the PTO end crank bearing.

 

[johnsonracing]

If your changing bearings make sure you use that wider bearing on the pto side. Huge improvement.