'77 gs550 no spark

[lee-garner1988]

Hey all just need a bit of advice.
i was out riding last sunday when my gs went down on to
2 cylinders then the other 2 cut out
the bike had overcharged and blown out the coils i think because
there was alot off black gungy stuff around small cracks in the coils and there was no spark. i have replaced and regapped the points and condensors,changed the regulator rectifier and put s/h coils on it but i still have no spark ive checked the kill switch and thats all ok
im a bit confused so any help would be much appreciated

[Suzuki_Don]

Check the spark plugs are good. Try new ones. Check spark from end of HT lead to cylinder head. Check connections to coil. Remove points cover. Turn ignition on and separate the points with screwdriver tip. There should be a small spark at the points. Check these and get back to us.

[BassCliff]

Greetings and Salutations!!

Hi Mr. lee-garner1988,

It's a pleasure to make your acquaintance. Here is your magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", the Carb Rebuild Series, and the Stator Papers. Now let me roll out the welcome mat for you...

Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

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Thank you for your indulgence,

BassCliff

[Suzuki_Don]

CLIFF it took you 2 hours and 3 minutes. Shame on you. We have standards on this site to be adhered to YOU know that.

[chef1366]

What's a s/h coil?

[Suzuki_Don]

What's a s/h coil?

Hi Bill. I think it's second hand , as in used. They could be faulty as well.