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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
wrist pin bearing
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[QUOTE="unclefista240, post: 1345430, member: 77123"] went to put new rings in my 1995 rm 250 and now the wrist pin and bearing are too tight to fit through the crank. the piston moved freely at dissambley but i believe it was the piston moving on the wrist pin. the crank had small indentions from the needle bearings so i tried to clean them up with a dremel. i used a puller to remove the pin, id didnt seem too difficult. im gonna buy a new bearing and pin and try to clean up the crank. this is the first set of rings since all new top end. never seen this happen before. i dont have any bore guages, i did use an inside caliper and a digital caliper but its not as precise. i need it to last so...... maybe new conn. rod.could it have ran with just the piston moving? the plug looks fine and theres no play on the bottom end of the rod. now i just need a new wrist pin and bearing. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
wrist pin bearing
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