1F, 2F Carburetor

[Travis Chrisman]

Is there a difference between the 1F and 2F carbs? It looks like they mount the same on the different intakes but I'm not sure if there is a difference between the actual carburetors themselves.

 

[Pin_Head]

There are a lot of changes both large and small to carbs from 1979 to 1979. Every year is slightly different. Check out the pictures on Specter off road web site.

 

[Travis Chrisman]

There are a lot of changes both large and small to carbs from 1979 to 1979. Every year is slightly different. Check out the pictures on Specter off road web site.

Is it a huge deal to cross fit carbs to a different year engine?

 

[Pin_Head]

It is possible to interchange carbs, but it is easiest to swap F carbs with other F carbs and 2F with 2F carbs because of air filter and throttle linkage differences that are not so easy to deal with.

 

[Travis Chrisman]

It is possible to interchange carbs, but it is easiest to swap F carbs with other F carbs and 2F with 2F carbs because of air filter and throttle linkage differences that are not so easy to deal with.

Thanks, that helps a ton!

 

[AlaskanWheeler]

I'll be running a D-40 single barrel carb on my '77. In hopes I'll gain better low end throttle response due to the larger throttle body. I've been running a cable actuator so the swap is a little easier.

 

[Travis Chrisman]

I'll be running a D-40 single barrel carb on my '77. In hopes I'll gain better low end throttle response due to the larger throttle body. I've been running a cable actuator so the swap is a little easier.

What do you mean by cable actuator?

 

[AlaskanWheeler]

Depending on the year, some carbs were cable and some were mechanical actuated. Another difference is the single barrel carbs are mounted on two studs as opposed to 4 studs on the two barrel carbs.

 

[Travis Chrisman]

Depending on the year, some carbs were cable and some were mechanical actuated. Another difference is the single barrel carbs are mounted on two studs as opposed to 4 studs on the two barrel carbs.

The motor I bought is out of a 78, I don't really know anything about the motors themselves, I am just about to start my rebuild and I want to make sure I get it all right the first time. I appreciate the help.

 

[Alstruck]

There's also a problem with the dizzys. From about 1970 to 75 the stock dizzy is vacuum retard. Later models have vacuum retard and advance dizzy. These dizzys require a compatible carb in order to function properly to my understanding, even though they are on the same engine.