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Old 12-01-2017, 09:21 PM
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Default WHAT IS CROSS HATCHIN on cyclinder

     

I have a yamaha yz 250 - 2013 when i look at my cyclinder bore what dose cross hatching mean? what to look for to determine if the bore is good or bad shape? thanks keep it on 2 wheels
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Old 12-02-2017, 11:07 AM
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You will see little "scratches" that go around the bore, these are crosshatches.
When doing a rebuild the cylinder is honed (deglazed) which causes these light scratches. They are there to help the rings seat properly.
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Old 12-02-2017, 03:40 PM
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They also retain the oil on the cylinder walls for lubrication.

Paw Paw
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Old 12-10-2017, 07:35 AM
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Do a google image search for "cylinder crosshatch". It is also not a good idea to hone your plated cylinder. Look for any chipping or scratches on the plating. Look for any areas where the plating is worn through to the aluminum. The cylinder should have a letter stamped on it to designate the size. You can, and should measure the cylinder and piston to check the piston to cylinder clearance.
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Old 12-11-2017, 10:58 PM
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Hi what dose the last line in 351 post mean? You should measure the cylinder and piston to check the piston to cylinder clearance . I know the stamp on cylinder to designate its size. thanks
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Old 12-12-2017, 07:14 AM
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Yes, measure both to check the actual clearance. If you don't have the proper tools, take it to a machine shop. Check roundness and taper also.
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Old 12-12-2017, 04:10 PM
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ARE U TALKING ABOUT a cylinder that has not been plated BUT REPLACING PISTON AND RINGS. WOULD U CHECK that on a freshly plated cylinder and stock bore and stock cylinder?
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Old 12-13-2017, 06:58 AM
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Both...but especially a worn cylinder. I always check behind a freshly bored or plated cylinder. It doesn't hurt to make sure it is done properly.
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Old Yesterday, 07:52 AM
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^^^what he said!^^^
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