bike wont stay running

[irishluck]

had bike completly apart past couplde weeks replacing bearing and seals and everything else. I finally got put back together, put gas in tank and started it, ran for like 2 minutes and then shut off, and everytime i keep starting it, it just shuts off after 2 seconds, anyone wanna tell me what happened?

[racerman_27410]

how much fuel did you put in the tank ?


out of gas ?

fuel line has a kink in it between the petcock and the carbs ?


KOokaloo!

[irishluck]

full tank, clean li nes, no kinks nothing but im not worried about that now, got a new problem

[rktmanfj]

Open the petcock.

[irishluck]

okay let me refraise this.

I rebuilt carbs, so there is no gas in carbs or lines at all. i put gas tank on and filled with gas, cranked over for 30 seconds and it started, its getting gas.

Then after 2 minutes it shuts off.

So if there is no gas in the carbs or lines but starts why would i need to open the petcock for fuel to go through when its already open

[rktmanfj]

okay let me refraise this.

I rebuilt carbs, so there is no gas in carbs or lines at all. i put gas tank on and filled with gas, cranked over for 30 seconds and it started, its getting gas.

Then after 2 minutes it shuts off.

So if there is no gas in the carbs or lines but starts why would i need to open the petcock for fuel to go through when its already open

Hey, don't get pissy when we try to give you FREE troubleshooting help without you offering up the whole story...  how in the hell am I supposed to know this?


Randy T
Indy

[Mark Olson]

use the float bowl drains to confirm you have fuel at the carbs.

did you hook up the vacuum hose from #2 carb to the petcock?

if you did not put more than 1 gallon of fuel then you may be on reserve.

When starting the fj pull the choke all the way up and just push the start button and no throttle.  Depending on how cold the engine is rpm's will be around 2,000 until it warms a bit then rpm's will climb to 5,000 . slowly push the choke in till rpm's drop to around 2,000. let it run until you can turn the throttle without stumble, then push the choke the rest of the way in and rev with throttle . when it does not bog or stumble you are ready to ride. this procedure can take 2-10 minutes depending on ambient temperature.
idle rpm should be 1000-1200 rpm. they don't like to be lower than 1000.

If this is not how your 87 fj1200 behaves then you have a problem.

I know this post is a bit redundant but some people don't know how to start a fj.

[irishluck]

Hey, don't get pissy when we try to give you FREE troubleshooting help without you offering up the whole story...  how in the hell am I supposed to know this?


Randy T
Indy

its common sense. if i just put the fuel tank back on and then put gas in it, and it starts up, how would the petcock be closed? i mean that dont make sense at all. its obvouisly open if the bike started for 2 minutes.








Mark Olson:


I do have fuel in the carbs, 2nd there is not vacuum hose to go to the petcock, or well there is no valve or anything coming off the petcock for that.


i had like almost a fuel tank.



and the bike sat there and ran with the choke pulled out for 2-3 minutes and then shut off, then would barely turn on again after

[rktmanfj]

Hey, don't get pissy when we try to give you FREE troubleshooting help without you offering up the whole story...  how in the hell am I supposed to know this?


Randy T
Indy

its common sense. if i just put the fuel tank back on and then put gas in it, and it starts up, how would the petcock be closed? i mean that dont make sense at all. its obvouisly open if the bike started for 2 minutes.








Mark Olson:


I do have fuel in the carbs, 2nd there is not vacuum hose to go to the petcock, or well there is no valve or anything coming off the petcock for that.


i had like almost a fuel tank.



and the bike sat there and ran with the choke pulled out for 2-3 minutes and then shut off, then would barely turn on again after

Because if you didn't have the carbs off, there would still be fuel in them.

But hey, since you said you "had bike completly apart past couplde weeks replacing bearing and seals and everything else", I guess we can just take it for granted that you had the entire bike dismantled, huh?  Every nut and bolt, huh?

But since you seem to think I lack common sense,  I'm done trying to figure it out.

Ingrate.

Randy T
Indy

[tqmx1]

Unless the 87 has a aftermarket fuel valve there will be a 2 wire connector the fuel line nipple and a small (approx 1/8") coming off it. There is always a chance some one converted it over to a 1100 valve then the 2 wires would not be there and it would have a Prime/run/off control on the left side of the valve but it would still have the vacuum line.

[Mark Olson]

there should be a vacuum line going to the petcock. it is very small and hard to see, as you look at the petcock there is a small port near the top facing towards the front of the bike. the vacuum line goes from this to the #2 intake between the carb and the head. there is also a #1 intake port that should have a vacuum line going to the ignition module.

do you have either of these vacuum lines?

If they are both hooked up then you may have a kink in the fuel line due to bad routing of the fuel line.

It still sounds like you are running out of fuel.

[irishluck]

Unless the 87 has a aftermarket fuel valve there will be a 2 wire connector the fuel line nipple and a small (approx 1/8") coming off it. There is always a chance some one converted it over to a 1100 valve then the 2 wires would not be there and it would have a Prime/run/off control on the left side of the valve but it would still have the vacuum line.

honestly idk, ive looked on it and the petcock only has 1 line coming off of it and no other connectors or anything for any other lines...

so my guess is that it is after market or the 1100 like you are saying. and its weird, if you look at the diagram the gas tank, well it shows that the pepcock on there has some long vertical piece and 2 lines. Mine only has 1 main line coming out of the bottom and doesn't have that vertical piece. # 10 im guessing.

there should be a vacuum line going to the petcock. it is very small and hard to see, as you look at the petcock there is a small port near the top facing towards the front of the bike. the vacuum line goes from this to the #2 intake between the carb and the head. there is also a #1 intake port that should have a vacuum line going to the ignition module.

do you have either of these vacuum lines?

If they are both hooked up then you may have a kink in the fuel line due to bad routing of the fuel line.

It still sounds like you are running out of fuel.

ya i dont have those lines coming from the pepcock, ill have to take a picture of it for ya guys when i get home tonight to show ya what mine looks like. but the thing was, before i even disassembled the bike, it ran fine, i just wanted to clean it up and paint and what not.

[weymouth399]

#19 vacum line  hook this line up fuel should come out
#13 fuel line  goes to carbs

[irishluck]

ok once again, there is no place for a vacuum line on my pepcock

[1badfj]

Hey, don't get pissy when we try to give you FREE troubleshooting help without you offering up the whole story...  how in the hell am I supposed to know this?


Randy T
Indy

its common sense...

But since you seem to think I lack common sense,  I'm done trying to figure it out.

Ingrate.

Randy T
Indy

...buttt i actually work for a motorcycle shop...

If there's no nasty noises when turning it over, start with a compression test.

If that is flunked, pull the valve cover and start lookin for issues.

ya not gona do a compression test cause it pops

i really think i just threw the timing.
Makes one wonder why there are so many questions; it seems like the answers and "cheaper parts" are readily available to him.

well i did take the head cover off and when we looked at it we couldn't tell much difference but think i jumped one tooth.  How do i possible turn the crank to line the cams up to make sure there timed?

Maybe it is time for you to use the search function instead of reading the established members solicitated advice and then basically telling them they are wrong and you know more than them.

Makes one wonder why there are so many questions; it seems like the "answers" and "cheaper parts" are readily available to you.