Topic: cb550 electrical issue

[edonce]

ok so i was riding my newly rebiult cb550 76' super sport , i was cruising at about 70 , when i i felt hesitation in the throttel , when i pulled off she died as soon as she got to idel... i pulled the spark plug wire from cylinder 4 and it was the same i realized that 1 and 4 cylinder were'nt firing just 2-3 , so i figured the coil went bad on my ride.... i swapped out the coil... and it was STILL not running. any ideas ..im not sure how to check the continuity of the coils.
please help... what else can it be?

[05c50]

Check your points- 1 and 4 use 1 set,2 and 3 use the other set. Check wire between points and coil - each coil/point set uses a separate wire. Thats the easy stuff....hope it helps.

........Paul

[Badger 5]

My buddy is having the same issue with his bike.  We are still trying to sort it out.

[edonce]

oh forgot to say ... i have dyna electric ... no points...

[Tim.]

Check the timing - this will tell you if power is flowing through the Dyna pickup properly.  Also check power going into the coils.  Put a sparkplug in the wire cap and rest on the engine - turn it over.  Do the plugs spark?

If you swapped coils and it works, then you know the coil is fine.  It might not be getting any power though for 1 and 4 which points to a problem with the Dyna, or between the Dyna and the coils.  Could be a simple broken wire or loose connection.

[TwoTired]

Look at the plugs.  Fouled ones don't work well.  Swap with ones you do know that work, or renew.

How's your mixture?  Air filter dirty?


It is possible for a Dyna to go bad.  Do you have low ohms coils?
Check the power connection to each coil.

Check your battery voltage.

Cheers,