Do I need to replate this cylinder?

Zalev
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Zalev
Edited Date/Time 8/11/2019 5:09am
There is a little chip under the exhaust port? Can I run it like that?

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kb228
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kb228 8/10/2019 12:01pm
8/10/2019 12:01pm
Nah dude fix that shit
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77Moto
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77Moto 8/10/2019 12:08pm
8/10/2019 12:08pm Edited Date/Time 8/10/2019 12:11pm
You could if you chamfered it to where it wouldn't snag a ring, but that would only be a temp fix as it would eventually get worse.

I'd run it short term(like if you need to race tomorrow), but to be honest, it looks like it is chipping because of a bad chamfer job (there is very little on that cylinder), or this thing got hot at one point.

Also, the right side of the exhaust port got tight at one time or another. There is some good scars there in the coating.(The upside down pic, right hand side of cylinder)

That may have been what started the chipping in the first place on the exhaust. Did this thing get hot or cold seize at one point?
garagedog
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garagedog 8/10/2019 12:31pm
8/10/2019 12:31pm
"Can I run it like that?"

If it was my bike. I would not run it like that. Get it replated.

You could try to run it but then you risk a much more expensive failure in the near future.
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zippytech
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zippytech 8/10/2019 12:42pm
8/10/2019 12:42pm
I would just buy another one. I don't know what its off but 2 stroke cylinders are not really that expensive.. I would rather not find out that it did not work on the face of a jump.
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omalley
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omalley 8/10/2019 1:38pm
8/10/2019 1:38pm Edited Date/Time 8/10/2019 1:39pm
zippytech wrote:
I would just buy another one. I don't know what its off but 2 stroke cylinders are not really that expensive.. I would rather not find...
I would just buy another one. I don't know what its off but 2 stroke cylinders are not really that expensive.. I would rather not find out that it did not work on the face of a jump.
Some of the 2-strokes people are riding are NLA on cylinders.
Besides that, millennium and a couple others do a better job on their replates than some of the factories did in the first place.
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plowboy
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plowboy 8/10/2019 2:33pm
8/10/2019 2:33pm
Nope. That is only gonna get worse...and put you on your head. Replate or new. Or worry about it all the time.
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mxracer666
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mxracer666 8/10/2019 8:17pm
8/10/2019 8:17pm
Seriously??? ... Replate. It's not going to fix itself.
inthebadboycorner 8/11/2019 2:53am
8/11/2019 2:53am
Can you, yes. Just smooth and chamfer it.

Should you, no. It may continue to flake off and cause other damage, eventually the ring will Gaul and catch.

Me, I would run it, I have run something similar before.
TexasVet
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TexasVet 8/11/2019 5:09am
8/11/2019 5:09am
inthebadboycorner wrote:
Can you, yes. Just smooth and chamfer it. Should you, no. It may continue to flake off and cause other damage, eventually the ring will Gaul...
Can you, yes. Just smooth and chamfer it.

Should you, no. It may continue to flake off and cause other damage, eventually the ring will Gaul and catch.

Me, I would run it, I have run something similar before.
Agree mostly. Budget, down time, peace of mind, potential catastrophic failure. All are relevant. You know it's

damaged. See above.

Personally: potential catastrophic failure would be my greatest concern. Like has been said-to what degree and when.
VetMX.com
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VetMX.com 8/11/2019 1:31pm
8/11/2019 1:31pm
Time for a big bore kit, the difference being the cost of the bore job, that plating is done.
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