tahitianrider
Been Around the Block
Hi!
I have picked up a while ago a CB 360 that was running but with many problems: sometimes running on 1 cylinder at idle, severy misfiring when riding, stalling when hot and couldn't restart etc.
I suspected of both fuel and ignition problems, so I did a lot of work on it :
- Ultrasonic cleaned the carbs and rebuilt them with new parts (jets, o-rings, mixture screws, etc.)
- Tank was rusted with a mix of rust and epoxy (bad previous epoxy job) so I'm cleaning it right now, but testing the bike on my workshop fuel bottle anyway.
On the electrical system :
- I suspected a bad ignition timing, and when checking it with a test lamp it was indeed bad. So I installed new contact breakers and set the ignition timing correctly (it is hard to get it perfect but I'm very close : it fires at less than 1mm from the fire timing marks)
I tried to start the bike (from a workshop fuel bottle so the carb do get fuel correctly) but it wouldn't start at all (although I was starting before I tried to fix everything)
When check the sparks (with a brand new plug of course) I have no spark at all on the right cyl, and a weak blue spark on the left cyl.
The ignition coils are really warm so they get power. But they look like the original ones, they look very old and not in a perfect shape lol.
I would like to know if I can check other things before trying to order new parts (coils, condensator...) ? or do do the problem comes from the coils ? should I try to replace them first ?
Thanks a lot for the help and sorry if a similar problem has been posted already, I did search the forum, I already learned a lot on ignition timing that way
I have picked up a while ago a CB 360 that was running but with many problems: sometimes running on 1 cylinder at idle, severy misfiring when riding, stalling when hot and couldn't restart etc.
I suspected of both fuel and ignition problems, so I did a lot of work on it :
- Ultrasonic cleaned the carbs and rebuilt them with new parts (jets, o-rings, mixture screws, etc.)
- Tank was rusted with a mix of rust and epoxy (bad previous epoxy job) so I'm cleaning it right now, but testing the bike on my workshop fuel bottle anyway.
On the electrical system :
- I suspected a bad ignition timing, and when checking it with a test lamp it was indeed bad. So I installed new contact breakers and set the ignition timing correctly (it is hard to get it perfect but I'm very close : it fires at less than 1mm from the fire timing marks)
I tried to start the bike (from a workshop fuel bottle so the carb do get fuel correctly) but it wouldn't start at all (although I was starting before I tried to fix everything)
When check the sparks (with a brand new plug of course) I have no spark at all on the right cyl, and a weak blue spark on the left cyl.
The ignition coils are really warm so they get power. But they look like the original ones, they look very old and not in a perfect shape lol.
I would like to know if I can check other things before trying to order new parts (coils, condensator...) ? or do do the problem comes from the coils ? should I try to replace them first ?
Thanks a lot for the help and sorry if a similar problem has been posted already, I did search the forum, I already learned a lot on ignition timing that way