Author Topic: CB550 All is wrong. Running rough. Wont Idle etc...  (Read 6495 times)

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Offline NoLuck

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Re: CB550 All is wrong. Running rough. Wont Idle etc...
« Reply #50 on: June 13, 2016, 12:50:58 PM »
Thanks cal. Will report back tonight after work
1975 Honda CB550
1980 Yamaha XS650

Offline DaveBarbier

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Re: CB550 All is wrong. Running rough. Wont Idle etc...
« Reply #51 on: June 13, 2016, 01:39:36 PM »
I thought you tested the coil and got bad numbers? Obviously it's possible there were two issues...but did you not swap coils and test to see if the problem moved?

Offline NoLuck

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Re: CB550 All is wrong. Running rough. Wont Idle etc...
« Reply #52 on: June 14, 2016, 04:51:24 PM »
Ok so I'm really confused by the instructions being a novice. I'll have to probably spend this weekend figuring out how to do the test correctly
1975 Honda CB550
1980 Yamaha XS650

Offline Tews19

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Re: CB550 All is wrong. Running rough. Wont Idle etc...
« Reply #53 on: June 14, 2016, 05:02:32 PM »
Why don't you swap out the wires from 1-4 to 2-3 and see if the same issue arises?
1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline NoLuck

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Re: CB550 All is wrong. Running rough. Wont Idle etc...
« Reply #54 on: June 14, 2016, 07:10:49 PM »
Ok so I now swapped the wires from one coil to the other and now 1-4 don't get spark and 2-3 do get spark. Does this now indicate a bad dyna?
1975 Honda CB550
1980 Yamaha XS650

Offline Tews19

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Re: CB550 All is wrong. Running rough. Wont Idle etc...
« Reply #55 on: June 14, 2016, 07:25:41 PM »
Not necessarily.... I haven't read all the post but Cal is the man. He helped me through lots of electrical demons. His help is  the best out there. Take baby steps.

Did you follow his link to test your Dyna S?
1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline NoLuck

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Re: CB550 All is wrong. Running rough. Wont Idle etc...
« Reply #56 on: June 19, 2016, 03:05:16 PM »
Wow I sure learned a lot. Thank you for everyone's help on this. So the problem is solved.
The issue was bad wiring. There was a bad connection where the yellow wire from the coil connected to the dyna s ignition wire in the wire harness. Pulled out all wires and started looking and found the bullet connectors were slightly pulled apart. Out of all the things I thought this would be, it happened to be a basically a loose wire. Bike fires up now and just took it for a ride. Still need to change the head gasket but I'll wait till winter. Make a checklist and follow it from easiest fix to hardest and never assume anything is working properly. I ignored the wire because I did not think it would be that. Check all connections when it comes to wiring and exam them. Thanks again everyone sorry I postponed the wire check suggestion
1975 Honda CB550
1980 Yamaha XS650