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Engine case repairs

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Farmingstock
Trackday Trickster



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PostPosted: 14:55 - 11 Jan 2020    Post subject: Engine case repairs Reply with quote

Hello all

I have recently bought a pair of engine cases for my CR125 however there is some damage that I will need to get repaired, just wondering who could repair them??


Last edited by Farmingstock on 11:59 - 12 Jan 2020; edited 1 time in total
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Nobby the Bastard
Harley Gaydar



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PostPosted: 15:38 - 11 Jan 2020    Post subject: Reply with quote

I wouldn't worrry about the dings from where the conrod has twated the inside of the casing. I would, however, give the casings a damn good clean as there seems to be dirt and grit all over them and thats always going to be bad for bearings and piston rings.
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Farmingstock
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PostPosted: 15:46 - 11 Jan 2020    Post subject: Reply with quote

Yeah the casings will be cleaned a re-coated just want that bit repairing as the bike is being fully restored.

Is there anywhere that can repair this??
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Pete.
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PostPosted: 16:04 - 11 Jan 2020    Post subject: Reply with quote

What exactly needs 'repairing'? The worst thing I can see is where some monkey has been levering in the base gasket joint pulling up a raised edge that's going to have to be sorted out.
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Farmingstock
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PostPosted: 17:24 - 11 Jan 2020    Post subject: Reply with quote

Where the case is broke?? I bought them like this but they were sold as good condition, no damage, so the seller has suggested I get a price for repair hence the post asking where to get it repaired??
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Riejufixing
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PostPosted: 17:36 - 11 Jan 2020    Post subject: Reply with quote

Farmingstock wrote:
Where the case is broke?? I bought them like this but they were sold as good condition, no damage, so the seller has suggested I get a price for repair hence the post asking where to get it repaired??

Where is it broken? Like the others, I can't make it out.

Edit: you could supply your approximate location to help people who might advise...
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Farmingstock
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PostPosted: 17:52 - 11 Jan 2020    Post subject: I’ll add another pic guys Reply with quote

Damaged here and scored and chipped inside where the crank goes

Last edited by Farmingstock on 12:00 - 12 Jan 2020; edited 1 time in total
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WD Forte
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PostPosted: 17:56 - 11 Jan 2020    Post subject: Reply with quote

Maybe he means that chewed 'lip' bit lower centre?
Does that correspond the inlet port on the barrel mebbe?

https://www.bikechatforums.com/download.php?id=103046[/img]
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Farmingstock
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PostPosted: 18:17 - 11 Jan 2020    Post subject: Reply with quote

WD Forte wrote:
Maybe he means that chewed 'lip' bit lower centre?
Does that correspond the inlet port on the barrel mebbe?

https://www.bikechatforums.com/download.php?id=103046[/img]


Yes that is the part I want repairing! Is there anyone that would repair this??
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steve the grease
Crazy Courier



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PostPosted: 18:37 - 11 Jan 2020    Post subject: Reply with quote

Seriously, its not worth paying a fortune to someone to 'repair the damage' just get a thing called a rat tailed file, and do a bit of gentle filing to smooth it all off and blend the edges in. It will be perfectly all right, it just needs abit of 'fettling'. By the time its been welded and 'made good', you will be looking at a fortune. the damage is like a tiny scuff on a pair of shoes, nothing to worry about. When you have seen diesel engines with a hole in the side that a man can crawl into to assess the extent of the damage, then that's damage that wants repairing. Look at the chequer plate on the right and the pin on the left , the pin is about 250mm in diameter.
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Farmingstock
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PostPosted: 18:42 - 11 Jan 2020    Post subject: Reply with quote

steve the grease wrote:
Seriously, its not worth paying a fortune to someone to 'repair the damage' just get a thing called a rat tailed file, and do a bit of gentle filing to smooth it all off and blend the edges in. It will be perfectly all right, it just needs abit of 'fettling'. By the time its been welded and 'made good', you will be looking at a fortune. the damage is like a tiny scuff on a pair of shoes, nothing to worry about. When you have seen diesel engines with a hole in the side that a man can crawl into to assess the extent of the damage, then that's damage that wants repairing. Look at the chequer plate on the right and the pin on the left , the pin is about 250mm in diameter.


Thing is I bought the cases as no issues, so i can either send them back or get them repaired, is there someone in the UK that would repair this? If so how much? I will be racing the bike so it needs to be right and the seller will be paying for it to be rectified or I’ll just send them back.

Is there someone in the UK that can fix this?
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steve the grease
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PostPosted: 19:11 - 11 Jan 2020    Post subject: Reply with quote

Well realistically then , you might as well send the cases back.

3 or four people have effectively said that it's such a trivial bit of damge that its not worth repairing , but I dare say by the time you have found an Engineering shop that will weld them up and file or mill them back to exactly the shape they were when they left the factory you might be looking at a hundred quid or something like that.

The seller isn't going to want to shell out that much so he will want them returned.

If I was after a set of cases, I would consider those perfectly adequate.......
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Riejufixing
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PostPosted: 19:16 - 11 Jan 2020    Post subject: Reply with quote

Farmingstock wrote:
Is there someone in the UK that can fix this?

If you have to do something with them, you want an artiste with a high frequency set and then cut back the excess.
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Easy-X
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PostPosted: 20:43 - 11 Jan 2020    Post subject: Reply with quote

Maybe I'm looking at the photos wrong but is this internal damage?

I've just seen a YouTube video of someone pressing the two case halves together and punching out a hole with a misaligned indexing rod and they made do with metal epoxy to patch it up Shocked

Internals only need to be functional. Only the externals need to be shiney-shiney Rolling Eyes
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Farmingstock
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PostPosted: 21:37 - 11 Jan 2020    Post subject: Reply with quote

Is there no engine tuners on here then?? That could fix the issue in the red circle in the images I have posted??
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Pete.
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PostPosted: 21:50 - 11 Jan 2020    Post subject: Reply with quote

It doesn't need repairing. That bit is nothing more than a rib in the casting. Intake charge flows past it, nothing more. The only consideration is that it hasn't raised a burr on the jointing face. Pay someone to 'fix' it if you like but you'll be no better or worse off than it is right now.

Places that DO need looking at are marked in green plus any other spots where some monkey has barred the against that face. It causes a rised edge that will prevent the cylinder base pulling flat against that crank-case top face, risking a blown base gasket and subsequent melted piston.

Also since I can see daylight through the split in the cases it's reasonable to assume that they have been just as careless with the vertical split so that needs checking too.
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132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy
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Farmingstock
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PostPosted: 22:19 - 11 Jan 2020    Post subject: Reply with quote

Pete. wrote:
It doesn't need repairing. That bit is nothing more than a rib in the casting. Intake charge flows past it, nothing more. The only consideration is that it hasn't raised a burr on the jointing face. Pay someone to 'fix' it if you like but you'll be no better or worse off than it is right now.

Places that DO need looking at are marked in green plus any other spots where some monkey has barred the against that face. It causes a rised edge that will prevent the cylinder base pulling flat against that crank-case top face, risking a blown base gasket and subsequent melted piston.

Also since I can see daylight through the split in the cases it's reasonable to assume that they have been just as careless with the vertical split so that needs checking too.


Thanks for the input, maybe the picture isn’t showing the damage I have added another pic, there is some scoring possibly caused by the crank, the inlet port is chipped and jagged and the cases are uneven?

Before I spend a small fortune having the cases painted and a full rebuild I want to make sure everything is perfect and although I’m no expert it looks like it’s far from perfect.

[img][/img]


Last edited by Farmingstock on 12:01 - 12 Jan 2020; edited 1 time in total
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Pete.
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PostPosted: 22:35 - 11 Jan 2020    Post subject: Reply with quote

The bits you have marked are all non-issue, although they do need looking at. Why don't you pop them apart give them a clean and take good photos of the mating faces.
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132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy
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Farmingstock
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PostPosted: 22:52 - 11 Jan 2020    Post subject: Reply with quote

I received the cases as they are, the seller has stated they would pay for the cases to be fixed, I’m not going to start spending time on them if I need to send them back!

I originally asked if there is anyone that can fix the issues, as the seller has stated they would pay for the cases to be fixed.

I don’t want to start cleaning/grinding etc as the seller has stated they would pay for the cases to be fixed.

Feel like every post I have to repeat everything but the seller has stated they would pay for the cases to be fixed and this is why I asked if anyone could recommend someone to fix the cases.
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Riejufixing
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PostPosted: 23:15 - 11 Jan 2020    Post subject: Reply with quote

Farmingstock wrote:
Feel like every post I have to repeat everything but the seller has stated they would pay for the cases to be fixed and this is why I asked if anyone could recommend someone to fix the cases.

Well send the bloody things back then. Job done.
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Pete.
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PostPosted: 23:26 - 11 Jan 2020    Post subject: Reply with quote

I give up. Best of luck.
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132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy
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Farmingstock
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PostPosted: 23:27 - 11 Jan 2020    Post subject: Reply with quote

Riejufixing wrote:
Farmingstock wrote:
Feel like every post I have to repeat everything but the seller has stated they would pay for the cases to be fixed and this is why I asked if anyone could recommend someone to fix the cases.

Well send the bloody things back then. Job done.


So there is absolutely no one on the forum that can recommend someone to fix the issue!! 🤦‍♂️ FML nevermind
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Easy-X
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PostPosted: 23:47 - 11 Jan 2020    Post subject: Reply with quote

Huh? People have said this isn't much of an issue and it's for a CG125...

No one will know or care if you "fix" it, it's not worth anything Thinking
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Riejufixing
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PostPosted: 23:48 - 11 Jan 2020    Post subject: Reply with quote

Farmingstock wrote:
So there is absolutely no one on the forum that can recommend someone to fix the issue!! 🤦‍♂️ FML nevermind

No they can't be fixed, they're either distorted or a mismatched pair plus they have all those chunks missing and the crankcase mouth is all mars'd.

Why are you going to be "racing the bike" if you don't know anything about engines and won't listen to anyone?

PLEASE consider that a rhetorical question. I too give up.
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Pete.
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PostPosted: 00:01 - 12 Jan 2020    Post subject: Reply with quote

Easy-X wrote:
Huh? People have said this isn't much of an issue and it's for a CG125...

No one will know or care if you "fix" it, it's not worth anything Thinking


CR125. Totally different thing.
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132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy
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