hi guys i need help

Hi guys this is what it hapenned,yesterday i made
The change of oil and filter. When i finished
I tried to power on but its not started, the
Battery is new and sparknplugs too. I checked
Out and the coil and the cdi is working good
And there is spark from the coils. Sounds like
When the bike has no gas,but the tank has gas
And the carbs it seems has too. Before the oil change
Was working good. How can i know if my bike is
Drowned?or what can be the problem? my
Bike is a xj 650 82' maxim

Thanks guys

 

Take the spark plugs out and see how they look. Maybe they got fouled somehow.

Are you sure the petcock is working correctly? If you take off the hose to the carbs, you should have no gas come out (unless you have an aftermarket petcock).

It doesn't make sense that the oil change would cause the bike not to start for any reason.

 

The spark plugs looks the same, extremely new and clean.

Where is the petcock dude?

 

Oh ok sorry dude im speak spanish i know now what is petcock
And is working good. Byteway i change the tank is from a sportster
So the petcock is different

 

So if the sparkplugs look new after attempted starting, then you're not getting gas. Are the spark plugs brand new? It would be more easy to see gas on a used spark plug than a new one.

When did you change the tank? Have you tried starting it with the tank open?

If there is no gas getting to the cylinders, you need to work backwards. I don't think it is possible for all 4 carbs to not be giving gas. That means a plugged fuel line, dirty filter, faulty petcock, or no vent at the tank.

 

I don't think the sportster fuel switch is vacuum operated. Did you close off the vacuum nipple on the #3 carb?

 

Did you charge the new battery before you installed it? Is it trying to catch just as you let off the button? Have you set the petcock to prime for a few minutes to make sure the carbs are full?

If it has been awhile since your last like change your new oil will be thicker. That means more power will be needed to drive the starter and a weaker spark if you are running stock coils.

 

Yes friends the baterry is full charged and everithing is working
Good the cdi the ignition coil(both ) and there is good spark
But there is no explotion or combustion and the sparknplugs
Looks new yet. And yes the carbs are getting gas.

 

Why not try and spray starting fluid. Two good shots in each carburetor, make sure throttle is wind open when you do spray. Give it about half throttle and crank it. Should come to life strong for about 5 seconds. If it does not fire up, then your problem is something other than fuel delivery. If it does come to life, then concentrate on a fuel deliver issue. Make sure each bowl has fuel in it by opening and checking each drain. If no fuel in the bowls, work your way up to the tank. Maybe the tank has debris that is blocking fuel delivery. Not a good thing. You should put an inline clear gravity fuel filter as an added precaution. Good luck.

 

This may be to simple but it is something to check.... Did you acidently put it in gear? If it is in gear and the kickstand is down then it won't start. This happen to me once and boy did I feel silly. Just check to make sure it is still in nuetral.

 

Thanks XJOE55 BUT i tried spraying with fuel the air
Filters and nothing happened. And my carburator has gas
And there is good spark
I dont know what more can be the problem and thanks
Too olderbikerdude but yes is in neutral.

 

Thanks XJOE55 BUT i tried spraying with fuel the air
Filters and nothing happened. And my carburator has gas
And there is good spark
I dont know what more can be the problem and thanks
Too olderbikerdude but yes is in neutral.

 

Toto,
Remove the oil filler cap and make sure it smells of oil only. Use a old screwdriver laid across the terminals on the solenoid (watch for sparks) to see if the starter will spin. Also, are the HT in the correct position?

Roc

 

If the bike was running before changing oil then I would first check the fuel flow and be absolutely sure that gas is flowing and filling the carbs. Loosen the carb drain screws and be sure you are getting fuel flowing. If so, then I would check the kill switch and then the neutral switch. The neutral light must come on in order for it to start.

 

Toto, not sure what you mean by "spraying with fuel the air Filters and nothing happened". First, you need to have a spray can of starting fluid and not gasoline. Not sure how you sprayed the gasoline. It would have needed to have been atomized, not sprayed as a stream. Second, the filter(s) need to be off the carbs. Spray two good shots of starting fluid straight into each of the carb bores with the throttle wide open. Once you complete the spraying, open the throttle 1/2 way and hit the start button so it cranks. This will work even no carburetors installed and no gas tank hooked up. Because basically the atomized starting fluid replaces the function of the carburetor. So if the spark and timing on the bike is good, then it should start up and run until it uses the starting fluid up. If it doesn't start then it must be an electrical or timing issue.

 

How much oil did you put in? Do you have gas in the tank?

 

I don't see anywhere that you have addressed what BruceB said above. That was also my first thought. Is the new petcock vacuum operated? If yes, did you connect the hose to it? If not, did you cap the vacuum line nipple at carb 3?

And just cuz I've been there, did you check the kill switch?

 

I tried XJOE but nothing happened. Sounds like when you
Are out of gas. A mechanics said that maybe the valves are
Hanged..

 

With the language challenge, is it possible for you to take some pictures of your bike: carburetors, fuel lines, the tank, etc. That might help us see some possible issues?

 

Toto,

Si ya viste que tus bujias funcionan y producen chispa el problema esta en proveer el motor de gasolina, estas seguro de que esta fluyendo gasolina del tanque a los carburadores? Con 4 carburadores el problema es mucho mas dificil de identificar.

Cuando tratas de echar a andar el motor, el encendido electronico funciona? Hace girar el motor con la marcha pero no arranca?

Espero poder ayudarte