Carburetor differences! Understanding the changes...

[Shuriken]

My picture shows 2 carburetors side by side. The one on the left is from my 2002. The one on the right is from an unknown year.

Notice the R5 ID on the casting as well as the different internal tunnel length difference.

What was Yamaha doing here and is it ok to interchange?

 

[CaptainKyle]

I sent a message

 

[Graham]

The one on the left, is that a California model carb?

 

[Shuriken]

The one on the left, is that a California model carb?

I hope not!

As far as I know, my 02 is not the C model.