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Old June 15th, 2022, 03:35 AM   #12
Deezg
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Name: Kevin
Location: Detroit
Join Date: May 2022

Motorcycle(s): 1994 ninja 250

Posts: 27
What ive done so far.... when i first got the bike i had no spark at all on cylinder #2. Swapped in known good coils and got spark on both sides. Still no start so i did a compression test and found holes in both pistons. Rebuilt the engine and once done it fired right up. Was riding for 2 days and noticed a bad misfire. Then wouldn't start at all. Checked spark and had none at all. So i started with new plugs. No change. Good coils. Nothing. Checked voltage from pickup. Getting like 3ish volts AC. Getting 12+V at both coils. Something changed and now its sparking on #2 and not #1. Somehow the spark changed cylinders. Red/green to #2. Red/black to #1. Charging system is working properly because i tested over 13v at the battery while it was running. Im not exactly a electrical guru but after all the process of elimination i cant think of anything else that would cause the spark to jump from one cylinder to the other without any reason besides a cdi issue.
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