My 2000 Z370 has no spark and I'm looking for some ideas on how and what to test.
Here's what I can tell you so far... Sled was running well when put into storage a year ago but now has no spark. I eliminated the kill switch and TSS by unplugging it, no change. I unplugged the main connector coming out of the motor and still no spark. It seems something went bad just sitting during storage. Any ideas on a logical place to start with diagnosis?
Look for chewed wires?
Is the three wire plug fitted tightly together?
Next would be to do the tests for the stator as shown in the stickies on the section main page.
Disconnect the VLT, but not the others. That disconnects all the TSS, Kill, ignition switches. VLT = Velvet or Purple. You should be able to disconnect it separately from the others near the CDI unit
If you start it with this disconnected, your safest way to stop the engine is to pull the choke out.
You can put an AC meter on the Charge and Trigger and measure the voltages coming out. Red/WHT to ground should read between 14 and 36 volts AC. Same with BLK/RED to ground. (wide range is because it may not read more than 14-18 volts when you are just pulling the cord.
If you do, then you need to test the CDI unit voltages. On the WHT/BLU and BLK/WHT you should get around the same voltage as above.
The plug that has 4 wires, 2 are the lighting circuits (yellow), I believe the other two are ground and ignition switch (Vlt/Blk)
Disconnect the VLT, but not the others. That disconnects all the TSS, Kill, ignition switches. VLT = Velvet or Purple. You should be able to disconnect it separately from the others near the CDI unit
If you start it with this disconnected, your safest way to stop the engine is to pull the choke out.
You can put an AC meter on the Charge and Trigger and measure the voltages coming out. Red/WHT to ground should read between 14 and 36 volts AC. Same with BLK/RED to ground. (wide range is because it may not read more than 14-18 volts when you are just pulling the cord.
If you do, then you need to test the CDI unit voltages. On the WHT/BLU and BLK/WHT you should get around the same voltage as above.
The plug that has 4 wires, 2 are the lighting circuits (yellow), I believe the other two are ground and ignition switch (Vlt/Blk)
Thanks for the replies, given the time of year, I wasn't sure I'd get any.
All connectors are properly plugged together and no sign of chewed wires. Unplugged the single purple wire coming out of the motor and still no spark. Tested output voltage at red/black wire and got a reading of 35 vac (cranking with starter motor, plugs out). Ran the same test with red/white and got a reading of less than 2 vac.
Given the low voltage on red/white, what would be the next diagnostic step?
On the 4 pin plug, I jumped the brown to the purple/black and still no go. I pulled the flywheel off and found 2 loose magnets so that's at least part of the problem but somehow I dont think it explains the open readings when I tested resistance on the various wires.
The magnets are fully intact and undamaged, the glue just let go. I saw no evidence of broken or chafed wires, I'll see if I can post some pictures tonight. at this point I'm certainthat I need a new stator but I was wondering if I could have my magnets re-glued?
Thanks.
Kev rebuilt my ZL 500 Stator and did a great job, he even personally delivered it to my workplace! Just curious, where did you see a complete assy. for $199?
Hello. Great information. I have a 370 as well. The right cylinder comes and goes with combustion. This sled has become the mystery machine. Doesn’t matter which plug wire is going to it. And both cylinders have great compression. Any thought?
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