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Firing order

  • Thread starter Thread starter Tiny
  • Start date Start date
T

Tiny

Guest
Help...

I'm trying to get my 83 gs650 running for the first time this year,. Freshly rebuilt carbs... After hours of adjusting mixture screws and several recharges of the battery the best I can do is get it to sputter down some starting fluid before dying out...

At this point all four exhaust pipes should be warm but only one is (second from the right) and the rest are cold. I'm wondering if the spark plug wires are on the wrong plugs???
Can someone help me with where each spark plug should go?

The book says the firing order is 1234 but doesn't elaborate on which side goes to which plug or even which plug is 1,2,3 or 4...

Lost, again...
 
left coil goes to 1 + 4, right coil goes to 2 + 3.
cylinders are numbered 1 to 4 from left to right as you are sat on the bike.
 
Is this the same bike thst you have been working on since 2015? Reviewing your previous posts is confusing to me. Can you summarize how your carbs were rebulit, any mods/ aftermarket parts, etc. Needless to say, bike should fire on all 4 cylinders at idle - getting it to run nicely after that is more challenging.
 
Thank you... Of the two wires on each coil does it matter which goes to which? Left coil goes to 1 and 4 but which wire goes to 1 and which to 4? Or does it matter...?
 
One of the bikes I've been working on. I had "help" I wasn't aware of over the winter. Carbs were thoroughly cleaned and stock jets used. Problem now is it won't start at any setting on the mixture screws.... After all the cranking on it only one exhaust pipe got warm. Seems it's only firing on one cylinder.
 
Did you carefully bench sync the carbs? All four throttle plates must be similarly just about closed,or the idle circuits won't deliver fuel up into the carb's throats
 
Check for good spark on all 4. - all you need is fuel, spark (at right time) and compression
 
The plug wires are in the right order but the spark seems to be weak or erratic... Soooo new plugs or new coils? Thoughts?
 
Tiny said:
Thank you... Of the two wires on each coil does it matter which goes to which? Left coil goes to 1 and 4 but which wire goes to 1 and which to 4? Or does it matter...?
Click to expand...

No, It doesn't matter which one goes to 1 or 4.
 
very incomplete? its a 4 cylinder, what more do you need?

Steve said:
Very accurate, but also very incomplete.

The firing order is 1 2 4 3.
Click to expand...

the OP has a manual, he misread something or made a typo, it would be insulting and condescending to spoon feed an intelligent literate adult
 
Last edited:
derwood said:
very incomplete? its a 4 cylinder, what more do you need?

the OP has a manual, he misread something or made a typo, it would be insulting and condescending to spoon feed an intelligent literate adult
Click to expand...

hmmm ... and saying RTFM is not ?
I like people not only pointing out a mistake but providing correct info at the same time :applause:
 
Last edited:
Tiny said:
The plug wires are in the right order but the spark seems to be weak or erratic... Soooo new plugs or new coils? Thoughts?
Click to expand...
Remove/unscrew the spark plug caps and snip 1/4 inch off each plug wire to expose fresh copper. Ignition coils are very durable. Battery voltage ok? During cranking,a weak battery might drop too much giving ignitor fits. The "choke" system on this bike is an enricher: my bike needs full choke at cold start to be happy.
 
tom203 said:
Remove/unscrew the spark plug caps and snip 1/4 inch off each plug wire to expose fresh copper. Ignition coils are very durable. Battery voltage ok? During cranking,a weak battery might drop too much giving ignitor fits. The "choke" system on this bike is an enricher: my bike needs full choke at cold start to be happy.
Click to expand...

Thanks I'll try that... It's really bugging me that I was riding it last fall... Pull the carbs for cleaning and now it won't fire on three cylinders... I'm gonna do. Compression test later too just to make sure I still have compression because after cranking for a while only one exhaust pipe gets warm while the other three are still cold... Such weirdness....
 
derwood said:
very incomplete? its a 4 cylinder, what more do you need?



the OP has a manual, he misread something or made a typo, it would be insulting and condescending to spoon feed an intelligent literate adult
Click to expand...
In most of the rest of the automotive/motorcycle industry, an inline 4-cylinder engine has a firing order of 1 3 4 2, which is different than Suzuki's 1 2 4 3.

Your statement that that is not the correct order was very correct, but it was incomplete because it did not provide the correct order, which, as you see, could have been either of two possibilites.

That is why you and your comments are about to make history by being the first on my "ignore" list.

.
 
derwood said:
Steve could have just provided the information to the op, with out trolling me for a response, ...
Click to expand...
Since I have not taken the time to activate my ignore list, I happened to see this response.

I was not "trolling you for a response", I was merely filling in missing information.

Evidently you also feel that everyone is out to get you, there is nothing I can do to help you with that.

.
 
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