No spark on cylinders 1/4 82' CB650sc
No spark on cylinders 1/4 82' CB650sc
Hello all,
I have a 1982 nighthawk cb650sc with a few problems. I've started narrowing down the no spark problem and have replaced the starter solonoid, ignition coils, spark plugs/wires/caps, and also both spark units. I am getting spark from the right coil(yellow and black wires), going to cylinders 2/3 but no spark at all coming from the left coil (blue and black wires) going to cylinders 1/4. I am stuck and do not know what to do now. Any help would be greatly appreciated. I would like to ride before the winter comes!
Thanks!
I have a 1982 nighthawk cb650sc with a few problems. I've started narrowing down the no spark problem and have replaced the starter solonoid, ignition coils, spark plugs/wires/caps, and also both spark units. I am getting spark from the right coil(yellow and black wires), going to cylinders 2/3 but no spark at all coming from the left coil (blue and black wires) going to cylinders 1/4. I am stuck and do not know what to do now. Any help would be greatly appreciated. I would like to ride before the winter comes!
Thanks!
Re: No spark on cylinders 1/4 82' CB650sc
Have you tried swapping the coils to see if the problem moves to the other plugs? You may also want to check the gaps on your pulse generator. While you are there, check for continuity on the wires coming from the pulse generator to the ignitor modules. Sometimes they will get pinched and broken.
Also, just so you know, the starter solenoid has nothing to do with spark.
Also, just so you know, the starter solenoid has nothing to do with spark.
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My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
- GeorgeSweety
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Re: No spark on cylinders 1/4 82' CB650sc
I'd just like to add, clean all the electrical connectors between your pulse generator and your coil, clean em good!
Re: No spark on cylinders 1/4 82' CB650sc
Thanks for replying so soon! I have cleaned all the connections and that didn't seem to cure the problem. I am pretty new to this but I have a multimeter and light bulb circuit tester and I am just not sure how to test the continuity coming out of the pulse generator. Also, this 82 doesn't use the point system its electronic, would that change anything? I know I don't have a gapping issue because of that but what else could it be? Getting nice blue spark out of the 2/3 but nothing from 1/4.
Thanks!
Thanks!
Re: No spark on cylinders 1/4 82' CB650sc
Here are a few pictures of what I'm working with. Just need help checking the continuity of the two blue wires coming out of my pulse generator.
Thanks
Thanks
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- GeorgeSweety
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Re: No spark on cylinders 1/4 82' CB650sc
Bater55 wrote: I know I don't have a gapping issue because of that but what else could it be? Getting nice blue spark out of the 2/3 but nothing from 1/4
Hi Bater, from your previous post it "appears" that you are assuming that your pick up gap is non adjustable, which isn't the case. The gaps are adjustable slightly by slackening the screws that mount the pick ups to the backing plate and moving the pick up then tightening the screws to hold them in the new position.
- GeorgeSweety
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Re: No spark on cylinders 1/4 82' CB650sc
Just found this and it will explain things better than I can
viewtopic.php?t=488
viewtopic.php?t=488
Re: No spark on cylinders 1/4 82' CB650sc
GeorgeSweety wrote:Just found this and it will explain things better than I can
http://www.hondacb650.com/viewtopic.php?t=488
Nice find!
Have a problem with your CB650? Have a technical question? Click here!
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
Re: No spark on cylinders 1/4 82' CB650sc
Thanks a ton for the help! I tested the two yellow wires and they tested out at 531 ohms but I did not get any reading from the two blue wires. So I am guessing one of those wires got pinched or came loose. Or could that pickup gone bad?
Thanks!
Thanks!
- GeorgeSweety
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- Location: UK.
Re: No spark on cylinders 1/4 82' CB650sc
Well if you can't get any readings from the #1 and #4 pick up and you have done all of the other things that you said, I would assume that it is dead. Please correct me if I'm wrong but you've changed everything apart from the pick up's? to me, that would seem to be the problem and you will need a replacement.
Re: No spark on cylinders 1/4 82' CB650sc
Correct, everything is brand new except the two pickups. Anyone know of a good place to get one?
- GeorgeSweety
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Re: No spark on cylinders 1/4 82' CB650sc
Ebay would probably be your best bet as Partzilla says they are "Obsolete"
Re: No spark on cylinders 1/4 82' CB650sc
It is definitely obsolete.
Before I bought a used one that may or may not be any better than the one you have, I would physically check the length of the wires and see if you can feel a break. I might even go so far as to splice in a new wire to see if that fixed my problem.
Before I bought a used one that may or may not be any better than the one you have, I would physically check the length of the wires and see if you can feel a break. I might even go so far as to splice in a new wire to see if that fixed my problem.
Have a problem with your CB650? Have a technical question? Click here!
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
- GeorgeSweety
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Re: No spark on cylinders 1/4 82' CB650sc
Folsoml, can they be seperated? They have a different outer cable on them, not sure if it is for strength or something electrickery. Nowt to lose by having a go at fixing them.
Re: No spark on cylinders 1/4 82' CB650sc
Okay will do. I found one for an 81' so I'll see if that'll work and check the wires for a break. What a pain! Thank you all for the help.
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