Bought Wrecked '86 VFR, Where Do I Go From Here??

Discussion in 'General VFR Discussions' started by mcpmartin, Nov 9, 2021.

  1. squirrelman

    squirrelman Member

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    paint stripper usually contains MEK, a deadly, cancer-causing chemical, so it wold be smart to read the MSDS covering it's use and handling.
     
    Last edited: Nov 16, 2021
  2. mcpmartin

    mcpmartin New Member

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  3. mcpmartin

    mcpmartin New Member

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    I bought this bike from an auction (not running). I have 2 major problems I'm trying to work through. The previous owner ran the fuel line from the tank directly to the carbs (no fuel pump). Obviously there are a few things missing. Here are the questions I have.

    1.) I have 2 fuel lines (1 in and 1 out) of the carb area. The 1 coming out looks like an overflow or something, but it sometimes leaks fuel when I switch the fuel to "on". What is this and am I missing a fuel return to the tank or something. Pic below.

    2.) My fuel pump, relay, and wire harness connector are all 3 missing. Like I mentioned, the fuel pump is missing along with its wiring & relay. I'm familiar with repairing wiring, but I have no point of reference here. It's hard to replace parts when you don't know what they look like or where they mount, etc. Can someone help me understand how the relay is wired into the fuel pump? I'm assuming it's keyed off the switch and might tie into the rectifier so the pump only runs while the engine is running. Pic below.

    Leaking Fuel Line (Fuel Return Line???)

    Missing Fuel Pump, Relay, and Wire Plug (What is this supposed to look like???)
     
    Last edited: Nov 21, 2021
  4. Captain 80s

    Captain 80s Member

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    #1: Is exactly how it should be except it goes thru that little ring mounted on the of the right rear carb. It is the vent to atmosphere hose for the carbs.

    #2: Pretty sure the extra wire is the one that had a bullet connector that used to go to the Fuel Cut Relay. It's suppose to look like there's a fuel pump (mounted on a bracket), fuel filter and relay there.

    Open your Factory Service Manual (You have one, right? Not Haynes, not Clymer) and look at the illustrations showing the components and routing.
     
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  5. squirrelman

    squirrelman Member

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    fuel dripping from the small vent line means that one or more float needles are leaking and need cleaning or replacement. it would be a miracle if the bike you bought does not need a thorough carb cleaning.

    running without fuel pump is ok, but you might not be able to access the lower portion of the fuel tank, so keeping fuel level in the tank high is important.
     
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  6. Captain 80s

    Captain 80s Member

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    [QUOTE="squirrelman, post: 630786, member: 3024" it would be a miracle if the bike you bought does not need a thorough carb cleaning.[/QUOTE]

    This right here. Trying to evaluate problems without starting at what would be the number #1 thing that will be in need of attention on a wrecked, non-running, auction bike is futile. Think of properly set-up carbs as part of the foundation to build upon. That is of course assuming you have decent compression that the sorted carbs can deliver to and be squished and ignited, the other part of the foundation.
     
  7. Terry Smith

    Terry Smith Member

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    The picture shows the physical layout, I assume you've got a service manual/wiring diagram, but if not the relay trigger comes from the yellow/green (from the CDI), black feeds the power in (from the fuse C) and blue/black feeds power to the pump. If you put a jumper into the male clear 2P plug from the relay it makes the pump live all the time the ignition is on. The pump cycles until it achieves back pressure then stalls out.
    IMG_2649.JPG
     
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  8. mcpmartin

    mcpmartin New Member

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    This right here. Trying to evaluate problems without starting at what would be the number #1 thing that will be in need of attention on a wrecked, non-running, auction bike is futile. Think of properly set-up carbs as part of the foundation to build upon. That is of course assuming you have decent compression that the sorted carbs can deliver to and be squished and ignited, the other part of the foundation.[/QUOTE]


    No, guess I wasn't clear before. The bike will start, idle, and rev for as long as you want to manually supply gas to the fuel inlet to the carbs. That's not my problem. I'm pretty sure I clearly stated above that I have missing supply parts (pump, relay, and wiring for relay). The wiring harness was cut up at some point (guessing previous owner/who knows). Regardless, I'm trying to get it back to an original state, but it's very difficult to replace wiring and parts when you don't know exactly whats missing. There is no connector for the relay. There is no relay. There is no pump.
     
  9. mcpmartin

    mcpmartin New Member

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    I appreciate the pictures and suggestions. I'm guessing a fuel pump from the late 80's or early 90's would work, right? It doesn't have to be one specifically designed for the 86/87 VFR, right? I'll probably look to eBay and find a used one for that era to fit my application. Also, I'll probably have to look at wiring diagrams to figure out how to add back a plug for the relay (as it's no where to be found). I appreciate the help!
     
  10. Captain 80s

    Captain 80s Member

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    It can run and seem ok, but you have issues that need to be addressed before you move on. Filling the oil with gas is not good.
     
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