Update.....carbs cleaned, rebuilt installed ...wont start

So as the title says....carbs cleaned, sprayed, blown through and all gunk removed. Back history....new coils, new wires, new plugs and even a new spark unit.
Fuel lines primed, fuel pump is supplying gas, float bowls have fuel (ckecked by unscrewing drain screw). Each carb initial set to 2 1\2 out.
Fully charged battery connected, turn the key on, spray some fuel down the throat and almost starts. Kinda tries to and thats it and then battery too weak and again put on the charger. Pull the plugs, they are wet. Check spark and it's okay on all 4.
Carburators are back off to recheck.... coils off, plugs out?
Any thoughts?
This bike is seriously starting to make me think it will never run again...

 

If the battery is that weak that it dies that quickly, it may be the problem. Have you tried jumping it with a different battery?

 

new float needles or old? Are you using a nurse bottle to keep it running?

 

Jev, Battery hasnt been jumped yet, i'll try that tomorrow after i re assemble everything.
Ridervfr....old float needles,bowls have fuel in them, no spray bottle used yet.....cant get it to run....but i have completely stripped the carbs again, all seems good. All plugs were getting fuel... But i do have a question, one side has the pilot screw.....the other side is empty....first pic willshow were the pilot goes.....whats the second opening for...(i have to upload from my phone...brb)

 

picture of where pilot screw goes

 

, this is the other side of the carb and all 4 have the same opening opposite of the pilot screw. What's missing? Or not.

 

The carb body castings have that port on both sides so that any carb can be processed to fit either front or rear, left or right position. But there will only be one mixture screw per carb and the opposite end of the casting will be left in the as-cast condition.

http://vfrworld.com/forums/showthre...-Fuel-and-Air-Circuit-Identification-and-Porn

Sounds like a too weak battery, not up to the task. And no bike will ever start with wet spark plugs, and once the plugs have fouled they will never work again--time for new plugs. Find out why it's so wet, too much fuel--float level set too high or bowl inlet valves not shutting off.

 

Thanks Kennybobby, i'll re-check the float level and i'll swap out the battery. At this point i just want to the damn thing run and come to life lol. Been a battle for quite some time.
I'll putter away tomorrow and update in the evening. Thanks for the help!!

 

Are you sure the coils are firing the correct bank of cylinders? You mentioned new coils, aftermarket or stock? It's imperative you have the correct ohm'd coils for your bike. Does it really pop and backfire when it's trying to start?

 

Stock coils, certified good as they came off a running bike as the seller insisted. No backfiring as yet.

 

Did it start/run before you cleaned the carbs?

If not, what was the very last thing done before it developed this problem?

Hang in there, you'll get that thing sorted!

 

Thanks FM. It's never really stayed running since ive had it. I traded my dirt bike for it...Just taking it one day/troubleshooting day at a time...I'm just hoping it's going to be something simple....usually is something overlooked. ...I just gotta figure it out and go back to the basics.
Cheers

 

Try a fresher, stronger battery or jump from a non-running car. Did you verify that enrichener circuit is working and that its pickup tubes are clear ?? Did you use a wire to verify that idle jets are clear ? How old is the fuel you're trying to use ?? Did you change float height settings ??

 

New battery is ready, enricher circuit seems good...all plungers move. I'll check the Pick up tubes. Wire used to ensure all is clear, they are and i can see light when i hold em up, new fuel as ijustbought it 2days ago and am just now double checking the floatheights as i put them all back together....literary just installedthe last float. Book says the Height should be 7mm.

 

Ok. With that said I'd follow Squirrelman and tinkerinWstuf's wise advice. You might also check the compression. And yes, a fresh/strong batt is a must. Weak batts will sometimes have just enough strength to crank the eng or provide spark, but not both. I'd also consider swapping in a brand new set of quality (NGK or ND) plugs.

 

Bought new plugs today, borrowing a compression tester tomorrow. I'm sure i did check it before....a few months back, maybe more but i can't seem to find the numbers. If memory serves me right i'm sure they were good. I'm kinda inerested in how they will be now...
Thanks

 

Even if the carbs were totally junked and out of gas, it should still run by spraying carb cleaner in the throats while cranking it over. It should show signs of life. That will confirm the ignition system working. Spray left to right to left and work the throttle. I did it with my bike when I wasn't getting fuel to the carbs. (the rubber line from the tank to the fuel pump was cracked and the pump was sucking air).

You do need a minimum voltage for the ignition to work, so that might have been your problem earlier.

You can't really mess up the timing, unless the plug wires are mixed up or the signal wires to the coils are mixed up. I would download a service manual and confirm the coils have the correct color wires going to them.

I have a different model bike, but I think the carbs are pretty similar, the pilot screws on mine were all facing the inside and the other side of that same hole was plugged. A previous owner may have pulled those plugs out not realizing they are necessary. It's not gonna want to idle if it's sucking air.

If you think the bike is flooding, open the throttle as you crank it over.

Did you bench sync the carbs to get the butterflys close to the same opening?

Is the idle speed set high enough?

When you do a compression test, hold the throttle open.

Have you checked the ground wires on the bike to make sure they are clean and making good contact?

The main power wire from the starter relay to the ignition switch can get corroded causing the voltage to the ignition system to be weak, check that connector as well as the fuse next to it. 30 amp I think.

I hope you get it running.

 

Thanks Jason, I'll check tomorrow. Lots to check