Getting My 86 Fired!!

So on my 86 VFR resto I got the tank on and it appears I have gas gravity feeding to the pump but I can get the motor to ignite. Motor spins good but not sure the pump is pushing fuels to the carbs. Don't hear anything at the pump and don't smell any gas. Suggestions on what to check and where to start are appreciated!!

Rookie

 

try to jump the pump..Hot wire it so to speak your manual should tell you how... but first check alll your fuses and make sure its plugged it...sounds stupid but it happens... you can also gravity feed some gas into the bowls so you can see if the bike will fire up..

Good luck

 

you can tell whether the carbs have gas by cracking open the drain screw on the bottom of each carb......

 

Jumping the Fuel Pump

Sorry no manual! No wiring Diagram

So the pump has a green and a black with blue stripe wire

Any idea which one is the positive lead??

Thanks

 

Wiring

The green is ground and the black blue is positive.Run the pump until it shuts off to charge the carbs. If this is not done the bike will take forever to start as the pump fires once per revolution and it will take quite some cranking to fill the lines and all four carbs.:thumbsup:

 

1986 750 VFR Project Bike Update

Ok sounds good. I will try that in the morning and report back.

 

Got it Fired ..but

Ok ..I jumped the pump and primed the bike buy might have got a little over zelous as it flowed out the overlow.

Then I cranked the bike and it basically started right up but ran a little rough. I had trouble keeping the throttle up when I noticed the fuel was coming out the overflow tube and dumping on the ground pretty good .

What's up with that? Any advice now??

John

 

Very common problem after prolonged storage: your float needles are not shutting off fuel properly after float bowls are full.

Drain carbs and apply compressed air to fuel tube leading from pump to carbs.

If that doesn't work, carb removal and cleaning are in order.

 

or the Orings that seal the fuel rails aren't sealing......let them swell a bit as they are expanding as the fuel hits them they should seal right up....unless you can see were the fuel is leaking from.

 

Crusty, wouldn't the fact that fuel is coming from the overflow tube ( the vent line actually) rule out leaky fuel rail O-rings ??

 

whoops didnt catch that part saw it and it went right past my eyes......it wouldn't rule it out cause they could still be leaking :madgrin:

sounds like the float needles to me are stuck....yep yep:biggrin:

 

Hey guys,

This is my first post here, but I'm the person who just bought this bike, and I've got a question for you. The engine starts but it won't stay running for any length of time, the carbs arn't over-flowing anymore. i was wondering if you guys had any sugestions.

Thanks

-Rob

 

More than likely the carbs need to be removed and cleaned.

Regards,
Rollin

 

that was gunna be next plan of action, thank you for the confirmation. I'll post back with the results.

 

With soap and water ??

 

alright guys I'm back. sorry it took me a week, i was waiting on parts to come it. So the bike now runs, and it runs alright with no load, it has a nice responsive throttle and sounds good, but once you get it on the road and you go above 3k rpm cylinders start to cut out, and then in, and then out again, rinse lather and repeat. I have some sea foam running through it, but do you guys have any other ideas?

 

I may have a set of 48 state carbs I can send on the carb exchange program.I will look at them in the morning and let you know.If they are good I will run them on a good known bike and send them to you but you have to pay the postage. Not alot to ask......beer money welcome as well.:biggrin:After that it is a pump or relay issue I would think.

 

NOW THAT'S the best deal ever !!!!!

Make sure it's great beer, not Bud or Coors.

 

haha, I was born and raised in Colorado and always grew up with Coors Original :biggrin: And even today living in Arkansas, the only beer i drink is Coors