comyo
Novice Class
Posts: 82
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posted April 27, 2010 11:51 AM
center bearing in crankcase
2000 zx12r 49,000 miles .....after rev limiter burnout @ a funeral
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TedG
Moderator
Posts: 8222
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posted April 27, 2010 12:27 PM
That looks repairable.
1st scrape out the big chunks of deposited material carefully.
Then use 2x steel wool to remove the fine stuff.
The important part is to make sure you have removed all built up material from the bearing.
There may be some grooves in the bearing bed which are okay, but any built up material will make the bearing have too little clearance. Then depending on how much clearance you have the bearings can be purchased in different thicknesses and plastiguaged.
I have seen worse. Bearings are soft and when spun deposit material instead of gouge.
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Ted
2000 Green ZX12 sold
The fast color!!
Green 2005 ZX10R
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comyo
Novice Class
Posts: 82
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posted April 27, 2010 01:22 PM
quote:
That looks repairable.
1st scrape out the big chunks of deposited material carefully.
Then use 2x steel wool to remove the fine stuff.
The important part is to make sure you have removed all built up material from the bearing.
There may be some grooves in the bearing bed which are okay, but any built up material will make the bearing have too little clearance. Then depending on how much clearance you have the bearings can be purchased in different thicknesses and plastiguaged.
I have seen worse. Bearings are soft and when spun deposit material instead of gouge.
Thanks Ted. I was about to give up on the case.
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when you get that fast there's always more waiting
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comyo
Novice Class
Posts: 82
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posted April 27, 2010 01:26 PM
Any ideas on the best place to buy ..010 over bearings?
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TedG
Moderator
Posts: 8222
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posted April 27, 2010 02:33 PM
quote:
Any ideas on the best place to buy ..010 over bearings?
Kawasaki color coded their bearings and they are of different sizes. The only real way to figure out what you need is look in the manual and it states the different sizes. Measure, measure, measure, then plasti-gauge.
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Ted
2000 Green ZX12 sold
The fast color!!
Green 2005 ZX10R
2009 Concours Black ABS
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Shane661
Needs a life
Posts: 11494
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posted April 27, 2010 03:18 PM
You could send it out and have that surface welded and then re-honed, I imagine. Contact Y2KZX12R or try Rick Stetson at Harry's Machined Parts in MA.
I don't believe that oversize (OD) bearing shells are readily available.
Shane
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NOX
Needs a job
PMRA / TMRC Super Street 4022
Posts: 3745
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posted April 27, 2010 04:36 PM
They are not, you are correct Shane.
Find a new set of cases, and learn from the mistake..........
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TedG
Moderator
Posts: 8222
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posted April 27, 2010 06:55 PM
I believe those bearing beds are inserts and if I am correct about that, they probably don't like any welding. I am not saying it can't be done, it may be very difficult.
You are correct they don't come in oversizes but they do come in different sizes for good fitment.
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Ted
2000 Green ZX12 sold
The fast color!!
Green 2005 ZX10R
2009 Concours Black ABS
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Bigbore4
Zone Head
Posts: 806
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posted April 29, 2010 07:28 AM
The case is screwed. The only possible way to repair is welding and line bore. heaper to find another case.
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entropy
Moderator
Posts: 8671
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posted April 29, 2010 09:46 PM
it hard to see in the 1st pic, but the thrust surface looks 100% screwed.
like bigbore says, i guessing the cases are fukkered.
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TedG
Moderator
Posts: 8222
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posted April 30, 2010 08:50 AM
It is almost impossible to tell from the pictures. What we are seeing could be nothing more than bearing material that will clean off. It is okay for the surface to have some scratches in it, as long as the main surface is mostly undamaged. Again it needs to be cleaned to see what is really there.
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Ted
2000 Green ZX12 sold
The fast color!!
Green 2005 ZX10R
2009 Concours Black ABS
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