Gas tank swap?

[racerrad8]

The carbs are from a 1200 and were rejetted and tuned, and are modified for a single inlet fuel system.

(er, sorry Randy found someone closer to me).

Paul,

No problem, I hope they work out well for you. I do note by looking at the pictures those are not 1200 carbs, they are 1100 original gravity feed carbs with the fuel pump version center tee added. You can tell flat bottom of the slide as well as the un-shrouded emulsion tubes.

I see they used the original gravity feed fuel tees as well instead of the fuel pump version transfer tubes. Can you tell how was the fuel flow stopped, they appear to have been cut off, but how are they closed off?

Also, you might need to adjust the jetting for a little bit closer for the bike requirements. Those 122.5 main jets are what I use in our race car applications. The smaller 150 air bleed jet also makes the 40 pilot run like a 42.5 as the air side of the mixture has been leaned down from the factory 155.

Did they tell what they did with the needle settings as well?

I am really interested in the blocked off original gravity feed fuel tees.

Randy - RPM

[Paul1965]

The carbs are from a 1200 and were rejetted and tuned, and are modified for a single inlet fuel system.

(er, sorry Randy found someone closer to me).

Paul,

No problem, I hope they work out well for you. I do note by looking at the pictures those are not 1200 carbs, they are 1100 original gravity feed carbs with the fuel pump version center tee added. You can tell flat bottom of the slide as well as the un-shrouded emulsion tubes.

I see they used the original gravity feed fuel tees as well instead of the fuel pump version transfer tubes. Can you tell how was the fuel flow stopped, they appear to have been cut off, but how are they closed off?

Also, you might need to adjust the jetting for a little bit closer for the bike requirements. Those 122.5 main jets are what I use in our race car applications. The smaller 150 air bleed jet also makes the 40 pilot run like a 42.5 as the air side of the mixture has been leaned down from the factory 155.

Did they tell what they did with the needle settings as well?

I am really interested in the blocked off original gravity feed fuel tees.

Randy - RPM

To be honest, I didn't ask many questions other than how much it cost and how soon I could have them ($395 exchange, the whole process was done in a week). It only cost $18 for me to ship them to MO and they didn't charge to ship me the replacements. I thought Jim had said that these were 1200 carbs but I guess not, since he wouldn't have to convert those to a single inlet. As far as needles go, there's no info on the build sheet he gave me other than that they replaced them. I gave him the specs of my bike and let him set up the carbs, I just took them out of the box and bolted them on. As far as blocking of the ports, I saw a black filler of some type but I don't know specifically what they used. I do know that they pull the carbs apart and do some milling as part of the conversion, and talking to Jim he figured you did the same thing. If you want more info I can reach out to him, or you might even try him yourself (fj1200carburetors.com)

[racerrad8]

Yes, there is machining required to allow the gravity feed carbs to accept the center tee fitting. The later model carbs use a transfer tube in place of the 10mm fuel tee which were block with the black filler you peak of.

I will talk with Jim the next time he calls to order parts and let him know about the transfers tubes for use in place of the original inlet tees instead of the black filler.

Randy - RPM

[Pat Conlon]

Hey Randy, question: when converting from gravity fed over to fuel pump, do you see the need to convert the carbs over to single feed, or will the existing dual feed work ok?
Assuming of course that the needle seats are corrected.

I can see where folks need to convert over to dual feed inlets if wanting to go from fuel pump over to gravity fed....although that would never happen.

[racerrad8]

I have done them both ways without any issue. It is cheaper to leave them as dual inlet due to the additional machining for the center two carbs to use the center tee.

Randy - RPM

[Paul1965]

And of course since the tank was a different color and I picked up new lowers, I had to get it all painted 

Here is everything after the 2nd coat of clear went on.