Hello. Long time lurker and hoping that theres still enough people on this board to help me out. I always prefer forums as it is, but here goes..


99 fzs600 with no spark. I have absolutely ran out of ideas why. I bought it with no spark, the previous owner gave up.


I have:

• two igniter boxes
• new plugs
• new leads
• new coils
• tested pickup coil - 260ohms
• loop plugs x2 in place under the seat
• replacement loom, all continuity tested, all plugs clean
• anything that would kill the spark has been tested and proven to work (kickstand, clutch switch, cutout switch)
• every wire going into the igniter box has been continuity tested to where it ends up, via the haynes mnaual
• new battery

I have 12v at the back of the coils with ignition on.


clean earth points.


absolutely stumped but i have three really important questions:

• The two white plugs under the seat with looped connections - one of the plugs has four connections, but only two are looped. Is this correct?
• Is there a way to bypass the ignition cutoff relay in order to rule it out? It HAS failed some of the tests in the haynes manual but from reading the diagrams it seems to just send 12v to the igniter box anyway, which it does.
• Pickup coil reads 206ohms and jumps to 260ohms when ignition is on. When it picks up a signal from the rotor, it only moves around about +_20ohms. Is this correct?

As you can see i am knee deep in this thing at the moment and am stumped how something so simple can refuse to work.


The bike is mostly in bits as a winter project and as such i have great access to everything.


Thankyou in advance for any replies!