1st post- Need help please

Hey guys! Just signed up yesterday and I must say this forum has a lot of info:thumbsup: I'm working on a 1986 VFR750 and I cleaned out the gas-tank but now don't remember which lines go where... I have the manual and it didn't help much. I know on the left side the fuel line from the pump goes to the tank and also the vacuum line from the canister. The one I'm having problems with is the "spout" coming out on the right side of the tank (under the tank obviously). I have a loose line coming from the radiator neck but I think that's just an overflow tube and goes nowhere.

The two "spouts" coming out of the bottom look the exact same/size. Ones for the fuel line the other is for.....??? Ventilation? Thanks in advance!

 

The spout on the right side of tank or passenger side, is just an overflow tube. It should be routed down and threw so if you spill filling up or overfill it will just drain down onto ground. It is probably your longest hose.

 

Thank you for the quick response. Now I'm off to see if there was even a hose there at all.....I'm guessing probably not. Should the overflow tube for the radiator filler neck be routed down to the bottom of the bike also?

 

There should be like 3 hoses all ending in same general area I believe. All of mine ended in a clip slightly in front of my right foot.

 

Texans

Tex would be the expert on this......he has more gen 2 tanks than Honda!:biggrin:

 

Hah. I've been turning the bike over and figured out it's not getting fuel. So I disconnected the fuel outlet line off of the pump and it's dry. So either the pump isn't working or the relay? What's the easiest way to test for those? Hopefully after fixing that she'll fire....We'll see

 

I had or have (so to speak) a similar problem.

I tested the pump by taking it off with both tubes attached, put the inlet tube in small fuel can and outlet tube in another.

You can activate the pump by using your battery isolating the plug connections on the pump and then touching to your battery.

Easier with two but last time I didn't have anyone so I made leads out of simple connectors holding it on the fuel pump plug while I touch the battery by hand.

I used an old extension cord I didn't need for the wiring.

Hope this makes sense.

Consequently, Toecutter taught me this for priming the carbs after any work. It will put fuel in your carbs very quickly so you don't have to wait.

 

Ahh, OK. That makes sense. The manual says to read the voltage at the relay with the ignition ON, to see if the relay is working. I guess if I get a response there then it has to be a dead fuel pump. I can imagine it going out after the bike has been stored for 8-9 years! Should you be able to hear the fuel pump kick on when the ignition is turned to ON, similar to a car?

 

If you can't get it started let me know, I'll take that 750 engine off your hands so you don't have to pay dump fees. With all that oil and gas it wil cost you a fortune in CA.

 

Thanks for your helpful response, I'll keep that in mind:crazy:

 

Yeah it does make a noise but don't know if I'd call it a click. It gets quieter as carbs fill.

 

I hate this bike......at the moment......Need it to fire.

 

What all have you done, maybe we can help. Might be something simple. Is it trying to turn over? What is happening when you try?

 

I'm on here searching constantly to help me out but having difficulties. I figured out the bike wasn't getting fuel so I went ahead and bypassed the fuel pump and kept the fuel filter inline. Still not getting fuel, so I removed the gas tank and even with the petcock on: ON no fuel comes out the spout on the bottom of the tank. So I took apart the petcock and it seems to be fine. Fuel is supposed to come out when it's on ON right? I'm pretty sure there's enough gas in the tank.

On a side note, the battery is shot and all I'm getting is a continuous clicking noise. So I'll be picking up a new battery this week.

 

I was having the exact same problem and found I just didn't have enough fuel in the tank. There is a outlet hose in tank that you have to fill past. Once we did this it flowed like the ocean. Gravity feed will not work for these bikes. Since your going to buy a new battery anyway, hook some jumper cables to it, fill tank significantly and try to start. I am sure you will find the fuel will start to flow then. Whenever I was having this problem I think I had at least a half gallon in it.

 

Thanks, that could be it. There probably is about 3/4 of a gallon in there. I've been searching and reading that gravity feed will work because the stock pump only pumps about 1-2psi. Jamie Daugherty(sp.) is the person I'm referencing. I have a battery charging that has the "start" setting which kicks up the amperage. I'll add more fuel and give it a go. Thanks!

 

Yeah that's what I thought, vacuum operated. Isn't there some diaphragm somewhere, maybe in the petcock, that has to be intact?

Also, don't discount the possibility of rust for a bike stored long term. I once got a bike that had sat for 3 years and found the tank outlet completely plugged with rust.

 

There is a vacuum line that goes into the front of the tank and it's clear. Also, I completely cleaned out the gas tank and cleared out the fuel outlets the best I could. Still could be a possibility though that "stuff" has settled.

 

try what tex suggested.......or if you want the bike to sstart. us an "IV" type fue bottle to get fue into the carbs....