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    Hello everyone I was wondering what all carburetors will work on a 1999 Roadstar I am new to motorcycles and got a Roadstar 1600 and it will only idle sometimes and will cough through carb every few minutes and if you give it throttle it does also sometimes it will run down the road 30 or 40 miles and then it will cut off
    Last edited by Troyf19; 01-14-2020, 07:05 PM. Reason: Didn’t explain problems

  • #2
    Mikuni HSR-42 is a popular alternative.

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    • #3
      Thanks didn’t know what one would be an easy alternative all the Mikuni 40 I found are 670 or more this bike has some problems so want to get it at least running before spending that on the carb the one on it has job weld on the body of carb hoping that might be problem

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      • #4
        Buy a used Roadstar carb for $100 ckean it and jet it properly and you will be fine.
        "I'm Ricky Bobby. If you don't chew Big Red.....then Fuck You"

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        • #5
          The carb you have is a BSR40 and it is a very good carb when cleaned and jetted properly. Yours sounds like it just needs a good bath in a carb cleaner. The HSR 42 will fit our bikes but it is an expensive mod. If you can do the mods to make an HSR 42 work then you have the ability to clean and jet the stock carb. Even if you install an HSR you will need to mess with the jetting to get it to work. The HSR also requires a throttle cable change or extensive mods to make the stock cables kind of half ass work.

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          • #6
            There's a used HSR-42 for sale on the RSC Classifieds right now for $150.00. Comes with throttle cables.

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            • #7
              If you go with a different carburetor, remember that you should have a TPS on it, as the TPS helps control the ignition timing.

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              • #8
                Originally posted by Father Pobasturd View Post
                There's a used HSR-42 for sale on the RSC Classifieds right now for $150.00. Comes with throttle cables.

                Sold already
                "I'm Ricky Bobby. If you don't chew Big Red.....then Fuck You"

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                • #9
                  If you can find an HSR marketed by Yamaha (speedstar) it will be setup for the stock cables and fuel pump. Basically plug an play except for the tps.........
                  not all those who wander are lost......

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                  • #10
                    Good used carb for sale on FB RSC for $65
                    "I'm Ricky Bobby. If you don't chew Big Red.....then Fuck You"

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                    • #11
                      Carb cleaner at Autozone about $4. Are you running a fuel pump? Running 40 miles down the road is an indication to me of a partial plugged fuel filter or possibly fuel tank vent, The bad idle and cough sounds like a partially plugged pilot jet or primary circuit.Dig into the carb you have before changing it to someone elses carb that also needs to be cleaned and jetting checked before installing.

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