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  1. #1
    Piston? WHAT Piston?!? JGringo's Avatar
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    Are these aftermarket carbs supposed to be routed this way?

    Hey,
    Was wondering if these carbs are supposed to be routed this way or if I need to change them. I have a really bad low end problem but it just rips it up high end...






  2. #2
    Piston? WHAT Piston?!? JGringo's Avatar
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    The orange line is fuel return to the tank and I think the carbs only utilize 2 of the three outlets from the fuel pump... could this be the problem with the low end?

  3. #3
    cheatin' piston popper addicted's Avatar
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    looks to me that your pulse nipples are blocked, and the pulse lines from the engine are going to the return lines?? Does it even run? look in the tech section or partsland to see the routing. That looks really wrong.

    Oh, and those look like stock pro 785 carbs.

  4. #4
    Piston? WHAT Piston?!? JGringo's Avatar
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    sad thing is yea it runs and it runs great at full bore rpms, but low end doesn't work. Almost like its not running all cylinders. It is using a triple outlet fuel pump too... so I don't know.

  5. #5
    ph2ocraft's Avatar
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    Why would it have an external fuel pump when the internal pumps are on th carbs? Can you get a photo pulled back just a little further and tell us where the fuel lines are going and coming from?

  6. #6
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    Lets Review

    First The Fuji Motor You've Got Has Or Had A Single Pulse Line For One Fuel Pump.the Carbs You've Got Now Have Two Fuel Pumps.(stock Pro 785 Carbs).the Orange Line Is The Carbs Return Line To The Tank.the Fitting With The Red Cap Is Where The Pulse Line Goes.the Other Carb At The Other End Has The Same Fitting.the Other Lines Are Supplying The Fuel From The Tank To The Carbs.you Might Be Able To Tee Both Lines To Get 2 Pulse Lines And 2 Fuel Supply Lines.

  7. #7
    ph2ocraft's Avatar
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    Quote Originally Posted by TxPro1200 View Post
    you Might Be Able To Tee Both Lines To Get 2 Pulse Lines
    As I recall, that's a NO NO.

    But he will need to decide which pump set up he's going to run and plumb for it.
    I'm not sure he can leave the fuel line IN without the internal pumps working. I think he'd have to at least remove the diaghram??

  8. #8
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    PUMP

    I Don't See A Problem Running Two Pumps Off One Pulse Line,theres No Cross Connection Between Cylinders,you Don't Run One Pump Off Two Pulse Lines,thats A No No

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