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and yes sometimes a carburetor simply needs to be replaced, but that is usually because they were bad from day one. I had a snowmobile like that, bought 2 identical machines and one had a faulty carb body from the start, never performed as well.
 

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You can’t swap around them since they sit on a bracket the connects them all together
How many parts on #4 carb are Not interchangeable with the parts on one of the other 3 carbs? Suzuki doesn't build the carbs, they buy them and it would become costly to order them all significantly different, they generally avoid that. I suspect you just need to try harder, or you might better start shopping for replacements, but sets of 4 carburetors at a time is going to get expensive real fast, new or used. New carbs are very costly and used carbs will need just as much repair service as your old ones did.
You're still lucky the originals are not CV carbs, that would have made it even more complicated, the ones you are working with are relatively simple. (y) best luck getting it firing on all cylinders
 

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Discussion Starter · #29 ·
How many parts on #4 carb are Not interchangeable with the parts on one of the other 3 carbs? Suzuki doesn't build the carbs, they buy them and it would become costly to order them all significantly different, they generally avoid that. I suspect you just need to try harder, or you might better start shopping for replacements, but sets of 4 carburetors at a time is going to get expensive real fast, new or used. New carbs are very costly and used carbs will need just as much repair service as your old ones did.
You're still lucky the originals are not CV carbs, that would have made it even more complicated, the ones you are working with are relatively simple. (y) best luck getting it firing on all cylinders
Yeah all the parts are interchangeable but there’s this bracket type thing on the back that holds all four together so can’t exactly swap carbs but I can swap parts around
 

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How many parts on #4 carb are Not interchangeable with the parts on one of the other 3 carbs? Suzuki doesn't build the carbs, they buy them and it would become costly to order them all significantly different, they generally avoid that.
They are different. The passages are drilled so the adjustments face outward. And 2 & 3 have the fill pipe drilled all the way through, where as 1 & 4 have the fill pipe on one side facing inward. #1 is the only one that has the mount for the choke lever, #3 has the port for the fuel tap, etc. There are other differences, too. You can’t just swap carb bodies around
 
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Yeah all the parts are interchangeable but there’s this bracket type thing on the back that holds all four together so can’t exactly swap carbs but I can swap parts around
While you can’t swap the carb bodies around, you absolutely should take them off the bracket to clean them thoroughly. You have to clean ALL the ports and passages
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They are different. The passages are drilled so the adjustments face outward. And 2 & 3 have the fill pipe drilled all the way through, where as 1 & 4 have the fill pipe on one side facing inward. #1 is the only one that has the mount for the choke lever, #3 has the port for the fuel tap, etc. There are other differences, too. You can’t just swap carb bodies around
Must be why they came up with those strange double barrel setups on the later models.
Maybe why I stopped riding Suzuki when they stopped building 2-strokes too.
 

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Must be why they came up with those strange double barrel setups on the later models.
Maybe why I stopped riding Suzuki when they stopped building 2-strokes too.
most inline 4 cylinder carb banks are the same way. Tha way gas fills the bowls, alone, means 1 & 4 are unique. 2&3 might be able to be swapped on some bikes, but the air screws would be on the wrong side usually,

as a matter of fact, I haven’t come across one bike that had interchangeable carb bodies OEM
 
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I guess OP just want's to play with carbs rather than fix any real problem.
I did this work professionally in a Suzuki dealers in the 1980's and the far left carb is the one that usually gives problems due to bike being parked on side stand.
The most common cause of a cold cylinder was always valve adjustment, but, of course, people are 'afraid' of doing it so it doesn't get done (plus the gasket was pretty expensive even in 1980, around $23.00 from Suzuki)
The far right carb could easily be oxidised internally as it would 'dry out' sooner than the others if bike is left on side stand for many years so cleaning may be a good idea but as carb removal and replacement with stock air box will probably be 'difficult' without buying new manifolds and air box to carb connectors I would avoid it until everything else is checked
 
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TrialsRider, the accelerator pump (usually on #2) is for acceleration, the air cut valve is to prevent after-fire on deceleration and is 'automatically' operated by intake vacuum
 
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