Cold #1 and #2 Exhaust header

[casper]

Good day guys

Please, I need help pleeeeeeeeeease.

I received a FJ1100 as payment for labour carried out on a '78 Honda CX500 as a restoration project. The FJ is in absolute MINT condition. It is a true beautiful bike. (see the pic below)



However.

It sat under a carport for 7 to 8 years. The previous owner stopped riding it after it started to misfire. He did say he replaced the plugs with brand new ones. I already saw that the fuel is varnish and the tank is rusted terribly. So, I teared the carbs of, layered them in petrol for 48Hrs after tearing them completely apart, then used carb cleaner to clean the carbs to perfection, and then blew them out with my compressor.

Check out these clean carbs!!



Here is the this: I did this trice!! Yes, 3 times! I bench synced and synced the carbs, but Every single time I start her after cleaning the carbs, it starts after a while of playing with it, but it runs on only #3 and #4 cylinders. The headers on 3 and 4 gets hot very very quickly, nut 1 and 2 remains ICE cold. No heat at all. I cannot be a dead coil, as 1 and 3, and 2 and 4 runs off the same coil.

Please guys, I need help. I want to get this old timer back on the road, and show my fellow bikes here in South Africa (Gauteng, Krugersdorp) what a proper classic is all about.

[FJmonkey]

Have you pulled the plugs on 1 and 2 to see if they are sparking? See if you can find an ultrasonic cleaner and do your carbs again. The jets are really hard to clean once they get plugged with that varnish you mentioned. Make sure you can see carb cleaner pass through each jet and passage.

Start at one end and work through each step. Do carbs 1 and 2 have fuel? Maybe the floats are stuck closed or improperly adjusted.

Spark, Fuel and air...

Good looking '85, I like the colors.

[roverfj1200]

I think I have read some where that on some FJs , maybe the early ones , that the reserve was to shut down two cylinders as a warning. I would look to see if there is some kind of wiring for this..


Could be a myth..


Cheers

[Harvy]

I think I have read some where that on some FJs , maybe the early ones , that the reserve was to shut down two cylinders as a warning. I would look to see if there is some kind of wiring for this..


Could be a myth..


Cheers

Hmmm...... not sure if this could happen with cylinders 1 and 2 as they are on different circuits...... 1 and 4 maybe, or 2 and 3 maybe, but not 1 and 2.

Harvy

[Mark Olson]

Pull spark plugs and see if wet with gas , next compression check.
see if spark is getting to 1&2 by attaching plug wires to spark plug while out of engine and cranking it over. You may have bad boots/wires.
If spark is ok . open fuel bowl drain screws to confirm fuel is reaching carbs of 1&2.
If you have spark and fuel in the bowl as well then clean carbs again. Float is stuck , sometimes they will drag on the side of the bowl .

Since the guy parked it with a missfire /backfire  It could be the spark wire boots. or maybe fuel line clog on the carbs.

[copper]

I think I have read some where that on some FJs , maybe the early ones , that the reserve was to shut down two cylinders as a warning. I would look to see if there is some kind of wiring for this..


Could be a myth..

I recall this epic topis about this http://www.fjowners.com/index.php?topic=9996.0

[FJmonkey]

Anyone, what is wrong with this image??? I see it, being a G.F. carb owner...

Hint, it is not the beverage bottle aux fuel tank....

[ribbert]

Anyone, what is wrong with this image??? I see it, being a G.F. carb owner...

Hint, it is not the beverage bottle aux fuel tank....

The two throttle cables?

Noel

[copper]

The brether hose is kinked because it is not the right hose

[Pat Conlon]

Yep
1) twisted throttle cables
2) kinked breather hose
I also see...
3) 2 float bowl vent hoses missing ( if those hoses shown are the float vent hoses, they are too small)
4) 2 choke vent hoses are missing
5) fuel line routing is incorrect...although it may be this way just for testing

I hope there is a vent in that bottle...

[FJmonkey]

Yep
1) twisted throttle cables
2) kinked breather hose
I also see...
3) 2 float bowl vent hoses missing ( if those hoses shown are the float vent hoses, they are too small)
4) 2 choke vent hoses are missing
5) fuel line routing is incorrect...although it may be this way just for testing

I hope there is a vent in that bottle...

Pat got what I was seeing.... And then some....

[casper]

@FJmonkey

Please please tell me what you see wrong!

Thanks for the help guys, I never worked on a FJ before. Thus I don't know these things.

Choke breather?? Where must this be?

Float breather pipe? My carbs has two white connectors between 1 and 2, and 3 and 4 I reckon that should then be the breather connectors? There are no pipes connected to it.

Can someone please post a pic of a correctly installed care with correct pipe routing please?

Jets, guys, these Jets and jet ports cannot be cleaner than the currently are. There carbs are PERFECTLY clean.

I appreciate immensely! (Sorry for bad English guys,  my home Language is Afrikaans)

[ribbert]

Please please tell me what you see wrong!

1)Pat, before you freak the new owner out too much, I can see 4 vent hoses (below) and they don't look too small to me.



2)The throttle cables are not twisted, just need a slight tweak left and right where they fit onto the carbies to give optimal alignment (not that it's enough to matter)
3)The crankcase breather is likely kinked because of where it has been pushed out of the way but he would be wise to check and make sure it is not too long when fitted.
4)What are the "choke vent" hoses you mention? Are you referring to the white T's between the carbs?

Noel

[oldktmdude]

Jets, guys, these Jets and jet ports cannot be cleaner than the currently are. There carbs are PERFECTLY clean.

I appreciate immensely! (Sorry for bad English guys,  my home Language is Afrikaans)

Have you cleaned the fuel passage ways in the float bowl housings? If these are blocked you will not have fuel in the idle circuits. Without said fuel, these cylinders will not fire. Make sure you can get carbie cleaner to flow through these small orifices.
                                                                                                                                   Pete.

[ribbert]

Thanks for the help guys, I never worked on a FJ before. Thus I don't know these things.

Casper, Monkey (Mark) has given the best advice yet:

Spark, Fuel and air...

Keep it simple. If you have fuel, air (compression) and spark in the right order and the right quantity, it must run.
You are missing one of these on 2 cylinders. There are many simple checks that should let you figure out very quickly which one is missing. In all likelihood, it will be spark or fuel.

Noel