gs450 spark issue

[mavmcgee]

Hello everyone. Ive encountered a problem with my 81suzuki gs450. No spark, like everyone else in the world. Here's my diagnosis so far. With both coils unplugged I check for power. With the key on I have constant power through my o/w (orange with white stripe) wires. I check for grounds. My ground to the right coil pulsates when I crank the motor. The ground for the left coil is not present when cranking. But when I turn the key off I all of a sudden have a ground at the left coil wire. (White wire) To me this tells me my cdi is not sending the correct pulses to the coils. Has anyone else encountered this?

 

[jfman]

The ignitors can be weak on these bikes and they do go out. That's why youll notice a lot of GS450's will be missing their ignitor.

 

[Aries]

Just wondering what you ended up replacing. I bought a project 450e and the owner before me did not really know much about the bike. I also am going to be doing crazy amounts of research to see what modern parts or different model parts can be retro-fitted to decrease the likely hood of common problems like the one you had.

 

[jfman]

Replacing the Regulator/rectifier with something better on these is a must.

The tiny OEM R/Rs make your battery overcharche kills it. Takes out the stator at the same time.

 

[Aries]

Thanks man, I really want to modernize the electrical system. I dont want to worry about this if I am far away from home. I have NO support structure in life, no family... I work nights.. got like the same 6 friends since I was in highschool. I would be SOL if I got stuck a few hundred miles away because of a commonly known electrical issue I could have fixed.

 

[jfman]

register on thegsresouces.com and read the stator papers.

Basically replace the R/R and the stator itself if need be