Minimal wiring

Hi guys

I’m new to the forum so please excuse me if I’ve missed something, I’ve wired my 92 xj600 up as per white drawing at the top of the thread and it cranks but I’ve got no spark, any ideas?

 

Having the exact same problem on an xj750. Can't figure it out.

 

2 year old thread

Leif have you tested for voltage at the tci?

also do a battery voltage drop test on the battery when cranking motor
battery should be 12.8 volts then when cranked no go below 10 volts or tci will not fire

then of course you want to confirm pin out of tci plugs if you made your own.

you also want to ohm out the ignition system
here are the specs
XJ750 air-cooled models:
Pick-up coils:
650 ohms +/- 20% = 520 ohms to 780 ohms acceptable range
Ignition Coils:
Primary side (input from main wiring harness):
2.5 ohms +/- 10% = 2.25 ohms - 2.75 ohms acceptable range

Secondary side (spark plug wires, without their end caps):
11K ohms +/- 20% = 8,800 ohms - 13,200 ohms acceptable range
Spark plug caps:
1981-83 models: 5K +/- 20% = 4,000 to 6,000 ohms per cap acceptable range
1984 RL models: 10K +/- 20% = 8,000 to 12,000 ohms per cap acceptable range

Spark plugs:
0 ohms per plug

 

it would be best if you started your own thread in
XJ Technical Chat

Id your bike in title xj750 max or seca if max the year also
tell us a little about the bike . like I removed the wiring harness and did min wiring,
I am using stock or aftermarket handle bar controls
and I am not getting spark