scratch in bore
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scratch in bore
my kdx 125 has a scratch in the bore... it is just on top of the exhaust port and it is vertical... and little maybe 0.5mm or less deep... how bad is that? and what can i do other than boring oversize?
also can it continue to run that way? as there is actually no piston movement sideways. also i am in the caribbean so boring oversize isn't available here unless of course there are other ways to do it. thank you for your timely response :-)
also can it continue to run that way? as there is actually no piston movement sideways. also i am in the caribbean so boring oversize isn't available here unless of course there are other ways to do it. thank you for your timely response :-)
- rbates9
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Pictures help a lot with stuff like this.
I'm not familiar with the 125 but I would assume that it is a plated cylinder so you would have to over bore it and put a sleeve in it.
The better option would be to have it replated back to stock spec if it is bad enough to worry about. Can you catch your finger nail in the groove?
I'm not familiar with the 125 but I would assume that it is a plated cylinder so you would have to over bore it and put a sleeve in it.
The better option would be to have it replated back to stock spec if it is bad enough to worry about. Can you catch your finger nail in the groove?
- fuzzy
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The best solution is to send to a replater with a new piston...They will bore the plating out/replate/get clearance right.that it is a plated cylinder so you would have to over bore it and put a sleeve in it.
If your scratch didn't go through to the bare aluminum (IE just a light scratch in the plating) I wouldn't worry about it for the time being.
'91 KDX 200 Project $300 KDX
'95 KDX 200 Project $600 KDX
'94 WR 250 Always a project
'95 KDX 200 Project $600 KDX
'94 WR 250 Always a project
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Millenium tech and cvtech aab (in Canada I used them and they were awesome) both offer exchanges where you order a cylinder they already have and then send yours when you have the new one. Worth emailing them to see if your core is good. This way you have almost no downtime. IF they have a 125 cylinder.......
Fletch
89 kdx 200 with 99 rm125 forks
89 kdx 200 with 99 rm125 forks
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- scheckaet
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catastrophic failure.
destroyed top end, rod, bearing...
Have it REPLATED.
destroyed top end, rod, bearing...
Have it REPLATED.
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- Julien D
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The trouble is that since the plating is peeled you have excessive cylinder piston clearance. THat means the piston can rock inside the cylinder more than it should and cause strain and cracking on your piston skirts. They can eventually fail (like mine did ) and throw a bunch of aluminum in your crank case. You can also break the case if this happens (I did) and then your in for way more than just a replate and piston kit.
If you HAVE to run it then do it but don't rev the piss out of it and warm it up good. But my advice is to replate and new wiseco piston and then your good for years and years and years
If you HAVE to run it then do it but don't rev the piss out of it and warm it up good. But my advice is to replate and new wiseco piston and then your good for years and years and years
Fletch
89 kdx 200 with 99 rm125 forks
89 kdx 200 with 99 rm125 forks