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You really won't know until you break them all apart. What you do see isn't as bad as it looks. Surface crud is 100% fixable. I would suggest separating each of them down to 4 individual carbs. Then tear into each one, one at a time, placing all metal parts in something glass like a jelly jar. You will want to soak each jar in carb cleaner. You want to do the same thing with each carb body using a coffee can or something. Be careful not to get any carb cleaner on any rubber pieces.
Let all that soak a few days. The using a small wire or compressed air, insure all passageways are 100% free.
Once you've done that, do it again. The carbs must be immaculate.
Yes you will need to sync them. For peace of mind, you'd want to do that anyway. But in this conversation, there's no other way to properly clean them. You can't submerge the carbs in carb cleaner with breaking them down. There are rubber O-rings that will be destroyed if you don't.
Even if you decided to go with another set of carbs, you would still need to sync the carbs.
You also need to check valve clearances before doing any syncing.
I don't think your carbs are going to be your biggest problem.
Your #1 carb and intake show a lot of corrosion. This makes sense because it's the lowest carb when parked on the sidestand.
When water gets in, it will run to the lowest point.
Here's the problem, all that water and junk that went through that carb, then went down the intake.
Probably past the valve and sat inside the cylinder, then drained past the rings.
I'm willing to bet the inside of the cylinder look similar to the intake boot. Not good.
You might get lucky if the valve were both completely closed and sealed well.
But your rings could also be very rusted and corroded.
Running the engine in that shape could destroy the cylinder very quickly.
The first thing I would do, is pull the spark plug on #1, then get a borescope and stick it down the hole and take a look.
You can actually get borescope that hook to smartphone on amazon for very reasonable price. Or borrow one.
Either way I'd look inside that cylinder before doing anything else.
Maybe keep one carb assembled till the others are done ?
As Hamlin remarked, “immaculate”......there’s no compromise. When the day comes to fire her up you’ll be glad you did it thoroughly.
Best of luck mate.
Hopefully it didnt make it past the valves, here is a shot of the intake after just blowing em out with the compressor. Chem dip still the best stuff to clean up the carbs and if I cant get a borescope now wouldn't I just be able to take the head off and see? Looks like.i may have to anyway to clean them valves off
Last edited by Igniuslacerta; Dec 23, 2019 at 12:04 PM.
Hopefully it didnt make it past the valves, here is a shot of the intake after just blowing em out with the compressor. Chem dip still the best stuff to clean up the carbs and if I cant get a borescope now wouldn't I just be able to take the head off and see? Looks like.i may have to anyway to clean them valves off
Even if the #1 valves were close, some of the others would have been open.
A borescope is the quick way to get a look at it because you can do it with the engine in the bike.
You can certainly pull the head off and look directly.
It's just a lot more work to pull the engine and then pull the head.
And it depends on your skill level.
But in the end, that is probably the best way to do it.
Will allow you to clean and inspect everything properly, fix any problems and make sure the valves and seats still seal.
Ok then. Wont say I'm amazingly skilled, but I just pulled and rebuilt the motor in the wifes van last year. So I know enough to get it done. Would the aluminum safe simple green be good to soak the head in and clean it?