Question about 1981 Suzuki GS 750 L

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My 1981 Suzuki GS1000G has no spark on 3 of the 4 cylinders

My 1981 Suzuki GS1000G has no spark on the #'s 2, 3 and 4 cylinders. Coils test fine. What's wrong?

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Cdi unit get the manufacturers to test the cdi out and get back to me

Posted on Sep 28, 2009

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My suzuki vitara 20v6 number one plug is not


its a 2.0L V6 called the h20 engine
in some countries, this engine uses a coil pack with 1 coil per
2 cylinders, this magic is called Wasted spark.
some have 3 coil packs for 6 cylinders
others have 1 huge pack with 3 coils inside.
what you have , im totally clueless, (no country stated, dig?)

but no matter, the pack is bad, or the wire that is FINE, is not FINE
no human on earth can test a HV wire, no body.! ( 1 out of 4 sure)
that is fact, (sure if opened) but what about the other modal failiures.
1: insulation breakdown.
2: resistance wrong, (say too high)
3: intermittent.
4: dead open, anyone can test this, its a no brainer. if ever.

this fact is why the 60k mile tune up, will fix it. new wires.
new HV wire set, I run NGK MAG wires, they last 2x longer.
easy.

no only that. with wasted spark , the other plug in the loop can cause your dead plug to be dead. and its wires too.
that is because it is a LOOP

if both plugs are new and both wires are new
then the coil is bad.
coil packs are usually way more expensive that $2.49 spark plugs
or $20 wires.

Aug 27, 2014 | Suzuki Vitara Cars & Trucks

1 Answer

How do i test cdi


swap your coils with the cylinders that do have spark. if it changes then you have a bad coil(s). generally cant test cdi's. It's a "replace with known good part" kinda test.

Mar 21, 2014 | 1981 Suzuki GS 750 L

1 Answer

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


There are 2 coils. The coil on the left provides spark for cylinders 1 & 4. The coil on the right provides spark for cylinders 2 & 3. The firing order is 1-2-4-3.
In case you don't know, this little tidbit is something to carry with you for life: Whenever a reference is made to a place in or on a vehicle, it is ALWAYS the perspective "from-left-to-right" of the seated vehicle operator.
In other words, in your case, as you're sitting on the bike, cylinder #1 is the one furthest to your left, and #4 is furthest to your right.

Feb 23, 2014 | 1979 Suzuki GS 750 E

1 Answer

1979 Suzuki GS1000, cylinders 2 & 3 are not firing


Hi, Anonymous you need "FIVE" things in order for a cylinder to run properly:
1. FUEL: in order to validate your not getting fuel spray some starting fluid into the air cleaner and hit the starter button, if it fires up and runs for a few seconds then you know you have a fuel delivery issue. Multi carb banks should be bench "SYNC"
2. SPARK: remove the spark plug and with it connected to the spark plug cable ground the threads to something metal you should see a bluish white spark if not you have a faulty spark plug, spark plug cable, ignition coil, condenser, CKP, ECM, sensor or the wiring in between.
3. COMPRESSION: you must have at least 80-100 PSI for most bikes, multi-cylinder engines should be within 10-15% of each other if not perform a leak down test you may have a burnt or bent valve or hole in the piston or broken rings.
4. CAM TIMING: confirm your timing marks are aligned to see if the cam chain or adjuster are worn out and the chain has skipped a couple teeth.
5. IGNITION TIMING: on older bikes check to see if your points have not closed up, timing plate has not become loose and confirm with a timing light for proper retard and advance functions, on newer bikes where timing is controlled by an ECM and is nonadjustable check you CKP, TPS, MAP, O2, sensor or its counterpart for integrity.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
1978 Suzuki GS550 Cylinder Not Firing Tech Corner Motorcycle Classics
Thread GS1000 Cylinders 1 4 not firing
Suzuki GS1000 Service Manual
OEM parts for Suzuki
Suzuki GS1000G 1980 Owner Manual

Jun 15, 2012 | 1979 Suzuki GS 750 E

1 Answer

1 and 4 cylinder not firing 2 and 3 are what could be the problem


Hi, easy fix,,your bike has 2 coils the first coil leads go to cylinders 1 and 4,,the second coil goes to cylinders 2 and 3,,so you need to get a new coil.

you will have to remove seat and tank,,the coils are located under the tank.

Mar 30, 2011 | 1981 Suzuki GS 750 L

1 Answer

Have a 78 gs 750, new points, condensors, plugs, plug caps, swapped coils from another gs, and still cylinders 2 &3 are not as hot to the touch as 1&4. Compression checked at acceptable values...


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

Sep 02, 2010 | 1981 Suzuki GS 750 L

1 Answer

1981 550 suzuki one cyclinder is dead has spark and fuel and bike runs but start extremly hard seems cold blooded


Check compression of cylinders, all should be close the same. Swap spark plugs and check if problem cylinder moved. If bike sits for long periods of time then most likely it will be a plugged carburetor.

May 20, 2010 | 1984 Suzuki Gs 550 L

1 Answer

The fire order on a 82 Suzuki GS750 t


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

Jul 22, 2009 | 1981 Suzuki GS 750 L

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