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How does big end bearing get oil on crank.

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Putting a new crank in my 08 rmz250.

Looked at new crank and for the life of me I can't see how it gets enough oil to the bearing.

2 strokes have a slice in the rod, I understand the sloshing in the oil would lube it but why no easy way for it to get in there?

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Putting a new crank in my 08 rmz250.

Looked at new crank and for the life of me I can't see how it gets enough oil to the bearing.

2 strokes have a slice in the rod, I understand the sloshing in the oil would lube it but why no easy way for it to get in there?

2-stroke have to depend on A LOT less oil for lubrication of the big end, and thats why they need that slot. your 4stroke crank has oil bath lubrication which is more than what your 2 stroke gets. Second, when your piston comes down on the expansion stroke you have pressure in the bottom end which is regulated by a vent, this pressure forces oil into the bearings...

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