1980 gs 550 l no spark ..I was told to relace ignition module

The ignition unit may be bad, only a dealer shop can test it and sometime they can't, or won't.

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

You turn them clockwise until the seat and then you give them 10Nm of torque and you are ready to go.

my mechanic told me the same thing and I've been using castrol straight 30 wieght oil for years and i own a 1989 kawasaki ninja 1000.

Sorry but they either work or they dont.
If yours isn't working, replace it.
But before you replce it consider checking the other components, because ign mods are exspensive.
it sounds like you've been already checking the other stuff. heres what i'd check if your bike came to my shop.
1. battery fully charged, and can take a load. (weak batteries = weak ign power)
i have a bike that won't fire at all with weak battery. Make sure battery is good.
2. check for spark at plugs, make sure plugs are good. Pull plugs and turn motor over.
rest plug next to head and turn over, do not touch the plug while turning over
or you can be shocked.look for spark.
if you have spark , then you ign mod is working.
if no spark, then check #3
3. power to coils. check the power going into coils,
if power but no spark, then coil is bad.
if no power. check #4
4. power to coils comes from a ignition system ( points/ cdi /ign. module)
there is a stator and a rotor. and a signal generator. on your motor
the signal generator wire sends a signal to the cdi, every time the rotor rotates.
the ignition system (ign.mod) sends power to coil.
so if no signal to the cdi, then signal generator is bad
if signal going into cdi but not sending the power to the coils then the cdi/ ign. mod is bad.

Hope that helps
Best Regards
Big Al

It is OK to jump start your motorcycle from a car battery as long as you do not crank the starter too long (it will burn the armature) and as long as the car/other vehicle is not running when you jump start your bike ( you can damage your electrical components( igniter box)). See if you can exchange one with a friend to see if that is the bad component.

it has electronic ignition (CDI), the ign pickup is mounter under th small cover on the trans case.

Replace ignition module.

with electrics start at one point and eliminate each possible cause ie; is the kill switch corroded inside the switchgear due to water ingression, when did you last change the plugs.is your coil working correct.is there a loose/damaged connection in the ignition system wiring, a bad earth perhaps.is there dirt on your electronic ignition pick up or if you have points do they need cleaning/replacing condensers need replacment from time to time. you may have a damaged ecu if you have electronic ignition.. hope this helps

gap is approx 12-15 thou/ but if running points can vary trgoing over to cdi?