Calling 1983 XT550 gods

[cemotobull]

Hey all,

We are helping a mate get his 1983 XT550 running.

Now here's the questions;

Do you need a battery to get spark on this model? (We have disconnected the lighting as there are no plans for rego). It doesn't have a spark with the battery connected.

Does anybody have a wiring diagram for ignition only?

Currently getting no spark, what are some of the simple fault finding exercises on this model? (Plenty of compression - no spark at all (not even a weak spark).

What is the best way to test the ignition??

Any other tips of suggestions welcome.

Thanks in advance!!!

[LWC82PE]

Check pulser coil and wires comming from it. Can be issues with them on those and the 600's. Coil falure and pinched/broken wires. Best way would be to follow test procedure in workshop manual.

[80-85 husky]

get ol mate to hold the spark plug wire while you kick it. that a 100% reliable method for testing spark

[mick25]

get ol mate to hold the spark plug wire while you kick it. that a 100% reliable method for testing spark

  my dad used me for that testing method at eight years old 
I have been told it can put your heart out of ryhm 

[cemotobull]

Lol, we did do the electrocution test, unfortunately with no result!!!

So who is XT Master of spark??

[mick25]

I did have the same bike years back it went well.
 Yes it did run with no battery .
But I never had elec probs with it at the time .
Is the earth wire ok on the frame ?
I've had times when the spark plug cap has been pulled off over and over and the cap to coil lead is chewed out , I just cut 10mm off the coil lead and re fit cap sometimes its the little things .
That's about all my elec back ground 

[Lozza]

Hey all,

We are helping a mate get his 1983 XT550 running.

Now here's the questions;

Do you need a battery to get spark on this model? (We have disconnected the lighting as there are no plans for rego). It doesn't have a spark with the battery connected.

Does anybody have a wiring diagram for ignition only?

Currently getting no spark, what are some of the simple fault finding exercises on this model? (Plenty of compression - no spark at all (not even a weak spark).

What is the best way to test the ignition??

Any other tips of suggestions welcome.

Thanks in advance!!!

Check if the CDI is wired in after the rec/reg that means the CDI is drawing 12v from the charging circuit to work. If it bypasses the rec/reg it's probably a AC system and doesn't need the battery.
You and Yamaha sparks 

[OverTheHill]

been years but should just a std yamy cdi system for this type of 4 poke single, similar to tt250 etc. Guessing red/white from pulser to box. brown & a red from each end of the source couil [cdi charge coil] into the box. Orange from box to plug coil. I'm lost after that. Probably a black with white tracer to the kill swich/ign switch/stop button. any black left over would be an earth & might be a black from stator to go to earth--& or from the box, not sure. sorry if that just confuses the issue. Won't be battery powered anyway.