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Big end crankshaft side play
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Posted by: intmach---------------------
What is the recomended side play when rebuilding a crank for a 96 rm250. I do not have a manual and i need some advice. WHen pressing the webs together on this crank how much space should there be between the trust bearing and the web...... I need to know asap so i can put this back together and get it running again...Thanks guys...
Posted by: TFR---------------------
I set them at .020 in (.508 mm).
Posted by: intmach---------------------
Thank you much........
Posted by: cr25096er---------------------
my old xr80 i think the crank bearings are shot. what is accepable? i can grip the flywheel n pull it in and out but it dosnt have much if any up and down movement. what do u think?
Posted by: TFR---------------------
You should not be able to move your crank up and down or side to side. I think that your crank journals are probably worn (the area the the main bearing rides on). Installing new main bearings will not cure this. Can you see if the crank is sliding in and out of the bearing or is the main bearing inner race moving that much? You would have the pull the fly wheel to see this. Good luck.
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