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Did I fry my ignition? (lemmy.ca)

submitted 2 weeks ago by GreatBlueHeron@lemmy.ca to c/motorcycles@lemmy.world

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I recently bought a '90 Yamaha XV535. I cleaned the carbs and was able to start it. I then decided to pull the tank and flush it out, replace the fuel filter etc. While the tank was out I took the opportunity to weld a little tab that holds one of the side covers back on with a little flux core welder. At the time of welding the battery was out and all the connectors around the fuel tank were disconnected. Now I've put it back together with a new battery and everything works - except spark!

I'm here kicking myself really hard for being so stupid - welding with the ignition module still connected. But then I did some reading and most stuff suggests that just disconnecting the battery is enough.

I'm going over it again today cleaning and reconnecting all the connectors but I'd welcome any input. Have I fried my ignition or is there a chance it's just a dirty connection?

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[–] Fenderfreek@lemmy.world 4 points 2 weeks ago (9 children)

Not related to welding on the frame, no current goes through the part in question. Either something got damaged moving stuff around or there’s a bad/disconnected part of the electrical system. Check a wiring diagram for things like kickstand switch, kill switch, etc. These can cut spark. Also check all your grounds and weatherproof connectors.

[–] GreatBlueHeron@lemmy.ca 0 points 1 week ago (1 children)

Thank you again. You were correct - I have not fried anything and it's now running again. I can't explain it - I gave up after finding this melted connection. Then came back to it, measured the resistance of the stator coils (which were all good) and cranked it again and it had spark! Maybe while measuring the stator I moved the connector for the pickup. Anyway - it's running and next time I'm in town I'm getting a can of contact cleaner to go over everything again.

[–] Fenderfreek@lemmy.world 2 points 1 week ago

That’s great! Hopefully it continues to behave for you - I rescued an ‘87 750 Virago many years ago, and it was a quirky bike to get tuned properly, but a neat little project.

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