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By Zrach
I wanted to share a successful workaround for a "no-spark" issue on a 2009 LT-A400.
This is specifically for cases where the CDI has been diagnosed as faulty, but the age or condition of the machine makes the cost of a brand-new OEM unit hard to justify.
Note: This modification compromises the factory “no-start” circuits.
On some malfunctioning CDI units the internally damaged circuitry is only partial.
Feeding full time power to the Parking Brake pin, the unit is triggered to bypass the internal fault and produce a healthy consistent output to the Ignition coil.
The Modification
See the second diagram attached below for the wiring specifics.
The Result:
The machine has clocked over 1,000km since this repair and is still running strong with no ignition dropouts.
⚠️ IMPORTANT SAFETY WARNING ⚠️
Please be aware that this modification compromises the factory safety "no-start" circuits.
The machine will now start in gear. The safety interlock involving the handbrake is no longer functional. The machine can move unexpectedly if the starter is pressed while in gear. Proceed at your own risk. If you sell the machine or let others ride it, ensure they are fully aware that these factory safety buffers have been removed.
Faulty CDI Workaround.pdf
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By vlxerdon
Hello from southeast Georgia. Was gifted a 2000 Yamaha bear tracker with out a carb or battery and looking like it had seen better days. Was told it had sat for about three years. Explained a lot. Put a carb on and a battery in and it started right up. Surprised the heck out of me Anyhow as stated in my opening I am 78 years old with a very long motorcycle backgground but brand new to atv's. Anyone else out here from Georgia? Would like to meet up with some folks for a ride or two. Looks like a great site. Thanks for having me.
Don
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By Martin82
Hello to all, could somebody help me to get the electric diagrams for Polaris Sawtooth 200 , i have issue with missing spark , and also with turn signal,
I need to verify whole wire harness wiress and connectors , and weldings , and massa connections , but i need the electric wire diagram for it.
Thanks for your support.
M
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By Daniel1971
I have a 2009 Honda rancher that has fuel coming out of the injector but will not crank. I can spray gas in through the breather and it will run a few seconds. Any help appreciated
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