Carb for a RAJO

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Mark Anderson
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Carb for a RAJO

Post by Mark Anderson » Thu Aug 25, 2022 3:21 pm

An older friend has a speedster with a RAJO. Currently has a Model A carb on it. It blubbers real bad at an idle, but runs great above that. He is wondering what the correct carb was used with a RAJO.


speedytinc
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Re: Carb for a RAJO

Post by speedytinc » Thu Aug 25, 2022 4:39 pm

Mark Anderson wrote:
Thu Aug 25, 2022 3:21 pm
An older friend has a speedster with a RAJO. Currently has a Model A carb on it. It blubbers real bad at an idle, but runs great above that. He is wondering what the correct carb was used with a RAJO.
I had a BB rajo with a 97. It coughed & sputtered badly until hot, then not so bad. I think it needed a heat pipe. I put a smaller carb(81?) & she still coughs a little @ start up, but not when hot. Runs great.
I have run a stromberg BXOV2. (down draft) Great carb. Adjustable main jet & accelerator pump. Very responsive when properly tuned.
I have seen dozens of different carbs used. I dont see why an A or B carb wouldnt work well. Maybe a carb setting/tune issue.

What was used originally, I leave for others who know.


Scott_Conger
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Re: Carb for a RAJO

Post by Scott_Conger » Thu Aug 25, 2022 4:47 pm

You need to tell folks WHAT Rajo head it is to know which carb is correct.
Scott Conger

Tyranny under the guise of law is still Tyranny

NH Full Flow Float Valves™
Obsolete carburetor parts manufactured


Topic author
Mark Anderson
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Joined: Fri Jan 18, 2019 3:30 pm
First Name: Mark
Last Name: Anderson
Location: Stratford Iowa

Re: Carb for a RAJO

Post by Mark Anderson » Thu Aug 25, 2022 5:31 pm

Guess I need to find out what head it is. I'm not sure he knows.


Scott_Conger
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Re: Carb for a RAJO

Post by Scott_Conger » Thu Aug 25, 2022 6:02 pm

To get you started, a RAJO "B" head would take a Zenith U6, a "C" head would take a Zenith ST4B and an "A" head would take a Stromberg OX-2 (I am pretty sure...and it might have come with an adapter(?))
Scott Conger

Tyranny under the guise of law is still Tyranny

NH Full Flow Float Valves™
Obsolete carburetor parts manufactured


Topic author
Mark Anderson
Posts: 32
Joined: Fri Jan 18, 2019 3:30 pm
First Name: Mark
Last Name: Anderson
Location: Stratford Iowa

Re: Carb for a RAJO

Post by Mark Anderson » Fri Aug 26, 2022 1:03 pm

Model C RAJO


Mike Lebsack-Iowa
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Re: Carb for a RAJO

Post by Mike Lebsack-Iowa » Fri Aug 26, 2022 1:47 pm

Hi Mark and Scott,
I’ve known fellas who were fond of Carter BB-1 with the adjustable main jet. My understanding is rebuild kits are available, they start and idle well, and they have nice accelerator pump on them.

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