Testing coils

[Guest]

I had to change out my coils last summer due to the fact I wasn't getting any spark. While the ones I switched to were used, it seemed to run ok but I'm still curious if they are putting out what they're supposed to. I tried a friend's off of his 1000 and the bike seemed to have about the same or just a bit more pep. What is a good way to check them to make sure they're putting out correctly? I want to get the most of the bike with my meager budget. If I had $300 to spend I'd just get a dyna s kit but that's not an option at this point.

[tom203]

1977 gs750 ? Include it in your signature as you might have more questions as you tear into this thing. Ignition coils are very durable. You can do a primary and secondary resistance test. See steps 10 and 11 in this link

http://members.dslextreme.com/users/storagecliff/images/electrical_odd-n-ends.html#A17

be warned that spark plug caps get corroded and give you false secondary ohm readings - unscrew caps from plug wires and measure wire to wire

[R3lease1t]

Thanks. Once I get the bike back together I'll have to test it. The engine is currently pulled but could be back in by the end of the week.

[tkent02]

Why would you need the bike together to test the coils?

[R3lease1t]

I guess technically I wouldn't have to. I just figured it would be easier with everything connected. I'll see what I can do with them today or tomorrow.