[Auficer]

I'm at my wits end. I picked up a 1987 Gl1200 aspy for $600. Been off the road for 6+ years. Fixed the starting issue, Fixed the clutch, old owner had the electric fuel pump wired directly to a toggle switch, which I feel is a big no-no. So I pulled all his crappy wiring off and am attempting to wire the fuel pump to pulse with the ignition coil. CAN SOMEONE PLEASE TELL ME WHICH WIRE FIRES HOT

TO MAKE THE PUMP PULSE WITH THE COIL? please for the love of God, I have all the schematics, tried half the damn wires coming in and out of the ignition module. Still can't get it.

 

[Auficer]

Thank you Dave! Is there another way guys usually wire a pulse fuel pump to make it timed to the engine speed so the bike can stay running? Or am I going to have to restore the original wiring?

 

[Auficer]

I see what you mean now about the relay I'm using, definitely not going to work with this application, guess I'm going to have to restore the original fuel relay to working order.... at idle if I leave the fuel pump switched on I have gas pouring from the overflow vents under the carbs, I was holing there was a way to speed up and slow down the pump dependant on rpm, however not so sure how that's possible if I can't use the coil.

Welcome to the forum.
The schematic you are looking at is for an '84. You should be looking at one for the .87 Aspy. There are differences.
Also, that looks like an aftermarket pump. May be wired differently than an OEM.
Also...and this is a big one...the '87 fuel system is one year only. NONE of the parts are interchangeable with any other year. Tank, petcock, hoses, filter, pump and carbs, the whole system, different.

...oh God no... sigh

 

[Auficer]

I see what you mean now about the relay I'm using, definitely not going to work with this application, guess I'm going to have to restore the original fuel relay to working order.... at idle if I leave the fuel pump switched on I have gas pouring from the overflow vents under the carbs, I was holing there was a way to speed up and slow down the pump dependant on rpm, however not so sure how that's possible if I can't use the coil.


...oh God no... sigh

Did not know there would be major differences, thanks for letting me know... further down I go!

 

[Auficer]

Thank you so much for the help fellas, so glad there are awesome forums like this to help us new guys out! I'm gonna run down to the auto parts store and see if I can find a 1psi fuel pressure regulator.... maybe 1psi feeding 4 carbs won't cause an overflow? Fingers crossed

 

[Auficer]

Is it just a stuck float?

 

[Auficer]

Am i correct in thinking if the pumps pressure was the issue it would leak out of both sides? It never leaks out of the left only the right.

 

[Auficer]

I agree Dave, I crossed the OE part number and the pump on my bike says it is compatible. I'm going to remove the carb and check the float and float Needle to see if there is an obvious blockage. If I don't see one I may try to source an oe pump, however they seem rare and expensive.

 

[Auficer]

The pump is eBay.

Fuel Pump For Honda GL1200A 1984-1987 GL1200I 1984-1986 Goldwing 2-4PSI 5/16" | eBay

GL1200I 1984-1986 Goldwing. GL1200A 1984-1987 Goldwing. Since 2001, we have started to manufacture the fuel pump for after market. Water Pump. Fuel Filler Gas Cap. Truck Cover. Valve Cover. · Current:1.0A.

www.ebay.com

Dennis do you think the OE Honda pump is even available? I did a quick check and every one said it was out of stock

 

[Auficer]

It sounds like you are certain the oem pump will work the best, so if I find no issue with the floats I'll source an 85-87 and rig it up, I'm in charleston, sc. was hoping to enjoy the summer on two wheels instead of four, guess we'll see!

 

[Auficer]

 

[Auficer]

Ethanol needs to go away.

 

[Auficer]

Floats can also leak and fill up with gas, so they no longer float. I've had a couple do that. On the second one I just replaced all 4.
While you've got the carbs apart it would be a good idea to replace the o-rings. OEM kits are cheaper and of course better quality than aftermarket. Jets clean up easily.

What solvent do you recommend to get rid of all these deposits? There is a good bit of gelatin as well as harder deposits stuck on the inside of the bowls. Seafoam time?

 

[Auficer]

Thanks Dave and Dennis! I'll get her cleaned up and synced, might even be on the road by sunday!

 

[Auficer]

Just wanna say thank you to all you guys for helping me sort this out, with your advice and corrections I took the carb off for the 3rd time, cleaned the hell out of each bowl and float needle, synched the carbs and took her out for her first ride back on the road in 6 years! Damn these things are fast!

 

[Auficer]

Oh yeah, and now that the float needles actually seat cleanly, THERES NO RIVER OF GAS POURING DOWN THE SIDE OF THE BIKE LMAO, and the pump is pulsing only as needed to fill the bowls. Now to figure out why the clutch is slipping.....

 

[Auficer]

Two possibilities on the clutch slipping.
One; the oil.
Two; the damper plate.
Either way the clutch has to come out. Damper plate is no longer available for the 1200. 1500 unit might fit.
Are you starting to wish you'd bought an electric bicycle instead?

Hahaha not yet! The master cylinder was bone dry when I got the bike so I'm sure I have some air trapped in the system, gonna do my best to re-bleed it again soon, and clean the master while I'm at it, then I think I'm gonna run some seafoam through the Oil and do a change, my sprag clutch likes to spin every once in a while so it may need to be cleaned up.

 

[Auficer]

If it has air in the line it would have the opposite effect, drag instead of slip. If it only starts to slip after it's warmed up the return hole in the MC is plugged.

DUDE! that's what I keep reading so I opened up the master and they said it was like the size of a 22 guage wire small. I couldn't find a hole that small for the life of me. Do you know exactly where it's supposed to be? I just rode it down to the gas station and after she was fully warm the slip was so bad I could barely maintain 45mph

 

[Auficer]

It's under the chrome thing, which pops out.

Darn, may be rusted closed, ill have another look in the daylight and get a bit more aggressive with it, thanks Dennis. Just forward of the main hole that you can see the piston through?