Posts
314
Joined
11/10/2020
Location
Bostwick, FL
US
Hey,
Link to vid: https://m.youtube.com/watch?feature=youtu.be&v=94vkfMrbqTo
Have a 2019 YZ250 that runs perfect. I’ve got a piston on the way just to freshen it up during winter, and wanted to check crank bearings just to make sure all is good.
The flywheel is tight in all directions. In out, up down, left right. Where I am confused, is rotating it back and forth. Going back and forth a very small amount, there is a noise coming from top end. My friend who’s an engine builder said it’s normal as you are going from one side of bearing to the other. Just looking for second opinion. (Sounds lime rotating it isn’t a test for anything)
Tried it on 2 other bikes and 1 bike did same thing that had fresh motor, and other kinda did just not as noticeable. Any thoughts?
https://m.youtube.com/watch?feature=youtu.be&v=94vkfMrbqTo
Link to vid: https://m.youtube.com/watch?feature=youtu.be&v=94vkfMrbqTo
Have a 2019 YZ250 that runs perfect. I’ve got a piston on the way just to freshen it up during winter, and wanted to check crank bearings just to make sure all is good.
The flywheel is tight in all directions. In out, up down, left right. Where I am confused, is rotating it back and forth. Going back and forth a very small amount, there is a noise coming from top end. My friend who’s an engine builder said it’s normal as you are going from one side of bearing to the other. Just looking for second opinion. (Sounds lime rotating it isn’t a test for anything)
Tried it on 2 other bikes and 1 bike did same thing that had fresh motor, and other kinda did just not as noticeable. Any thoughts?
https://m.youtube.com/watch?feature=youtu.be&v=94vkfMrbqTo
The Shop
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