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Old 02-06-2012, 09:56 AM   #1486
Deans BMW
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Originally Posted by JimVonBaden View Post
I don't get it???

How many R1100/1150/1200 bikes actually require any sort of major engine work, let alone rebuilding/reboring? IMHO it is a non-issue.

Jim
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Old 02-06-2012, 10:07 AM   #1487
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Originally Posted by ragtoplvr View Post
When the crank is 90 degrees from TDC there will be pretty good access to the rod nuts. Non-issue. If you take care of the bike, I would expect well over 200 K. Hopefully the cam chain guides can be replaced without major disassembly, that to me would be a bigger issue, they can and do fail sooner than the cylinders wear out.

I would count on there being pretty good supply of low mileage engines from bikes that get totaled.

Rod
How do you get the piston out to access the rod?
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Old 02-06-2012, 01:30 PM   #1488
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Take the sump/oil pan off.
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Old 02-06-2012, 02:29 PM   #1489
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Where are you "DasMatti"?

"DasMatti"
Undoubtedly we need some help getting this thread going again, how was your test ride?
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Old 02-06-2012, 05:46 PM   #1490
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Originally Posted by Anorak View Post
How do you get the piston out to access the rod?
I didn't think about that. Or, to be more accurate, I didn't think.

How often do you need access to the piston on a modern boxer? I'm aware of one where the piston disintegrated at 180K miles. The solution to that problem was a salvage engine that was only 25K miles old. Much cheaper than trying to fix the old engine.

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Take the sump/oil pan off.
What oil pan?

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Old 02-06-2012, 05:58 PM   #1491
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I seem to recall a number of posts regarding one cylinder vibrating and ultimately failing on the GS12. Often it was the right side. Hate to see some similar issue on this design.

I'll say it again-makes me wonder if what we're seeing isn't a running development engine being put through its paces for research.
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Old 02-06-2012, 07:23 PM   #1492
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Originally Posted by hillbillypolack View Post
I seem to recall a number of posts regarding one cylinder vibrating and ultimately failing on the GS12. Often it was the right side. Hate to see some similar issue on this design.

I'll say it again-makes me wonder if what we're seeing isn't a running development engine being put through its paces for research.
Looks like a (or two) running motorcycle(s) to me and I'm thinking all will be good
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tallguy-09 screwed with this post 02-06-2012 at 07:28 PM
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Old 02-06-2012, 09:45 PM   #1493
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Originally Posted by Anorak View Post
How do you get the piston out to access the rod?
In the case of the integral case/cylinders, you split the cases and the crank "falls out". Similar to rebuilding a Japanese four, the bottom case is split from the top and the rod bigends are exposed for disassembly.

The truth of the matter is, almost nobody rebuilds motorcycle engines anymore. There are plenty of wrecking yard engines available with low miles and in the case of a worn out engine, the rest of the bike is usually done by then anyway. How much is a ten year old bike with 250k worth?
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Old 02-06-2012, 10:00 PM   #1494
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Originally Posted by rdcyclist View Post
In the case of the integral case/cylinders, you split the cases and the crank "falls out". Similar to rebuilding a Japanese four, the bottom case is split from the top and the rod bigends are exposed for disassembly.

The truth of the matter is, almost nobody rebuilds motorcycle engines anymore. There are plenty of wrecking yard engines available with low miles and in the case of a worn out engine, the rest of the bike is usually done by then anyway. How much is a ten year old bike with 250k worth?
You are right about everything, my fear will be with the "Chain tensioner" plastic guides that tend to disintegrate from time to time.

Ps: If the new engine does not have the pesky plastic tensioner sliders, me bad and more power to them
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Old 02-06-2012, 10:06 PM   #1495
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Quote:
Originally Posted by rdcyclist View Post
In the case of the integral case/cylinders, you split the cases and the crank "falls out". Similar to rebuilding a Japanese four, the bottom case is split from the top and the rod bigends are exposed for disassembly.

The truth of the matter is, almost nobody rebuilds motorcycle engines anymore. There are plenty of wrecking yard engines available with low miles and in the case of a worn out engine, the rest of the bike is usually done by then anyway. How much is a ten year old bike with 250k worth?
It was a rhetorical question raised for the purpose of intellectual exercise.
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Old 02-07-2012, 07:58 AM   #1496
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It was a rhetorical question raised for the purpose of intellectual exercise.
Lord knows I need the exercise...
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Old 02-07-2012, 11:10 AM   #1497
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Originally Posted by marchyman View Post
I didn't think about that. Or, to be more accurate, I didn't think.

How often do you need access to the piston on a modern boxer? I'm aware of one where the piston disintegrated at 180K miles. The solution to that problem was a salvage engine that was only 25K miles old. Much cheaper than trying to fix the old engine.



What oil pan?

There has to be some access otherwise you wouldn't be a able to build the engine in the first place. Of course they could be 3D printing them. ;)
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Old 02-07-2012, 12:10 PM   #1498
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Originally Posted by Marki_GSA View Post
There has to be some access otherwise you wouldn't be a able to build the engine in the first place. Of course they could be 3D printing them. ;)
Don't bring logic into this!

Seriously, they simply compress the rings as they assemble the block halves!

Jim
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Old 02-07-2012, 02:53 PM   #1499
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Probably off-subject, but do those guys in the pics REALLY need those knee sliders with boxes mounted on those bikes?
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Old 02-07-2012, 02:54 PM   #1500
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Don't bring logic into this!

Seriously, they simply compress the rings as they assemble the block halves!

Jim
Just like assembling a Goldwing engine, right Jim?
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