How do i wire the coils on my 78 suzuki gs 750. spark plug order which spark plug wire goes where??

If it's a random misfire, I recommend looking for a high voltage problem in the ignition circuit, like a cracked spark plug, or a dirty spark plug boot, or a loose wire on the coils. Start it up in the dark and look for sparks jumping around the plug wires and coils. Point gap will affect timing, check for worn or pitted points while you're in there. Maybe a condenser is going bad.

check the cdi box i think thats your problem if so buy a dyna s 3 for it works great on mine

more than likely one of the coils died or plug wire insulation is rotten and it's arcing to the frame, be sure to check all wiring connections before you buy anything.

You have 2 coils with 2 spark plug wires each.Coil #1: it has Orange/white and Black/Yellow wires. That coil feeds simultaneously the 2 & 3 cylindersCoil #2: It has Orange/White and White wires. That one is for 1 & 4 cylinders.If you have remove them, it doesn't matter which one goes where as long as the spark plug cables are long enough to reach the spark plug properly.

The firing order is 1 3 4 2 and the engine runs Counter Clock Wise. Hope that helps .
A B C D

well try rearanging them to see difference--however make sure each plug wire is not bad or worn and inspect coil/transister points

The diagram below should help. Please rate my answer. Thanks.

Does the 2 & 3 cylinders have any oil smear on the plugs.? please pull off all the plugs and check the performance. Check the gaps in the plugs. now since you did compression check , I would advice to have the firing of the 2 & 3 plugs with the plug attached checked.
Now correct if the gaps are down or reduce slighly if the intensity is no so good.
now start the engine and remove plug 1 , if it stall , try again with 4, now try with 2 & 3.
Check if the firing order is misplaced or there is lack of HT in the distribution.
check and comment
please rate me

i have a 78 gs1000 it is the same as your bike and if i'm not misstaken 78,79 are the same i have some 78 ,79 and 80 wiring on mine and it works just fine

You only have 2 coils on this bike. It uses the wasted spark system. One coil will fire 1&4 the other will fire 2&3. You will see 2 HT cables from each coil. Try the left coil on 1&4 and right coil on 2&3. If it does not start try right coil on 1&4 and left coil on 2&3