Seat for inlet needle on SpeediFour

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  • April 19, 2026 at 3:25 pm #315880
    George Emmanuel
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      The inlet seat on the carb of a friend’s Speedifour is messed up. I have the parts manuals for both the Speeditwin 6039 and the Speedifour 7031. It appears that both engines have the same seat, but the manual for the Speeditwin shows a part number for the seat only and the manual for the Speedifour shows the needle/seat assembly and of course, has a different number.

      Are  they the same? If so, we can fix this guys motor by using a donor Speeditwin carb. I’m 95% sure they are

      George

       

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