Search found 50 matches
- Tue Aug 28, 2018 11:15 am
- Forum: Technical Discussion
- Topic: Cam sprocket index marks on 1979 model?
- Replies: 3
- Views: 4579
Re: Cam sprocket index marks on 1979 model?
Compared to CV/VA carbs, the piston/PD carbs are quite sensitive to the air side. A 1979 could have carbs with still the cutoff diaphragms. People here reported that the bike may run somehow but bad if they are gone (see e.g. http://www.hondacb650.com/viewtopic.php?f=4&t=722) The air cutoff dia...
- Sun Aug 26, 2018 10:29 am
- Forum: Technical Discussion
- Topic: Cam sprocket index marks on 1979 model?
- Replies: 3
- Views: 4579
Cam sprocket index marks on 1979 model?
I have done head gasket replacement on 2 seperate 1981 models in the past and I distinctly remember two punch marks at the 3 and 9 o'clock position of the sprocket - I'm doing the same service on a 1979 model now and I don't see the marks. The motorcycle is not running properly and will not idle (ru...
- Wed Jun 06, 2018 1:23 pm
- Forum: Technical Discussion
- Topic: 1979 cb650 Cylinder #1 not running
- Replies: 1
- Views: 3463
Re: 1979 cb650 Cylinder #1 not running
Some news: I found a slight cut on the yellow wire going to the right coil which I taped up. Some data: Ignition coil readings (same readings for both coils tested individually): between small blades going to wiring harness 2.5 ohm between plug cables 12.28k ohm Plug Caps (not sure which reading bel...
- Tue Jun 05, 2018 7:29 pm
- Forum: Technical Discussion
- Topic: 1979 cb650 Cylinder #1 not running
- Replies: 1
- Views: 3463
1979 cb650 Cylinder #1 not running
I'm looking for some opinions on where to go next with this one! https://imgur.com/5T1AvmP Found this old '79 in a shed about an hour and half away from home. The old guy was able to get it started but only with the choke halfway out and it sounded horrible, unable to idle and died as soon as the ch...
- Tue Jun 05, 2018 5:13 pm
- Forum: Technical Discussion
- Topic: Strange headlight problem
- Replies: 3
- Views: 4312
Re: Strange headlight problem
Update - It was the switch, or more specifically the little square copper piece inside the switch that brings the source (blue/white) to the white or blue wires.
- Tue Jun 05, 2018 1:47 pm
- Forum: Technical Discussion
- Topic: Strange headlight problem
- Replies: 3
- Views: 4312
Strange headlight problem
Hello everyone! I have a 1979 cb650 with a dead headlight problem. I'm already ruled out the bulb itself, so I got to checking this wiring diagram for the answer https://imgur.com/a/6RPUmiZ https://imgur.com/a/6RPUmiZ I decided to follow the path of the power starting from the ignition switch to the...
- Tue Apr 05, 2016 7:09 pm
- Forum: Technical Discussion
- Topic: Dead on cylinder #1
- Replies: 8
- Views: 6821
Re: Dead on cylinder #1
Compression test showed zero on cyl#1. Opened valve cover, turned engine over, 140 psi. I found the problem... There are two bolt sizes for the outer valve covers. I put the long one in where the short bolt should have gone. This bolt interfered with one of the valves on cylinder #1... Pretty embara...
- Mon Apr 04, 2016 12:11 am
- Forum: Technical Discussion
- Topic: Dead on cylinder #1
- Replies: 8
- Views: 6821
Re: Dead on cylinder #1
Camshaft timing would affect all four cylinders and it won't run nicely if you get it started at all. So probably all right. What about valve settings? The hose shows a cracked T-vent , Please also have a look what I wrote in the very similar problem in the 1981 CB650 #1 Cylinder not firing thread....
- Thu Mar 31, 2016 11:19 am
- Forum: Technical Discussion
- Topic: Dead on cylinder #1
- Replies: 8
- Views: 6821
Re: Dead on cylinder #1
I do not have a compression tester currentlyFolsoml wrote:What is the compression like on this cylinder now?
The hose in the picture seems to attach to the airbox. Is this something I must replace in order for the bike to run properly? I imagine so, but I wonder where I'm going to find it
- Wed Mar 30, 2016 5:57 pm
- Forum: Technical Discussion
- Topic: Dead on cylinder #1
- Replies: 8
- Views: 6821
- Wed Mar 30, 2016 1:28 pm
- Forum: Technical Discussion
- Topic: Dead on cylinder #1
- Replies: 8
- Views: 6821
Dead on cylinder #1
Hello people! I just finished a head gasket replacement on a cb650. I seem to have a dead cylinder (#1) now. When I pull the boot off of the spark plug, the bike idles no differently. If I remove the spark plug for cylinder #1 and ground it, it makes good spark. The bike runs, but sputters out of th...
- Thu Mar 17, 2016 3:01 pm
- Forum: Technical Discussion
- Topic: Front suspension air uni-line installation??
- Replies: 5
- Views: 5470
Re: Front suspension air uni-line installation??
Exactly -- This way, when one burns, I am TRULY screwed!Volker_P wrote:Don't say that.
You obviously found a way to put three fuses into four fuse clamps without having anything not fused any more.
- Wed Mar 09, 2016 8:56 pm
- Forum: Technical Discussion
- Topic: Front suspension air uni-line installation??
- Replies: 5
- Views: 5470
Re: Front suspension air uni-line installation??
Folsoml wrote:Undo the other side. Put the end you are holding on first. The other side can be installed without all the twisting.
- Wed Mar 09, 2016 4:56 pm
- Forum: Technical Discussion
- Topic: Front suspension air uni-line installation??
- Replies: 5
- Views: 5470
Front suspension air uni-line installation??
Gentlemen! Here is my situation: http://i.imgur.com/T9V497L.jpg I had to remove the right front shock on my CB650 -- I had to twist the air line that goes between the left and right shock to get it off, and it was awful, incredibly difficult. Is there a trick to installing this without twisting the ...
- Tue Oct 06, 2015 3:08 pm
- Forum: Technical Discussion
- Topic: When I try to start my bike, I just get a single click
- Replies: 41
- Views: 24596
Re: When I try to start my bike, I just get a single click
I think I'll just keep an eye on ittario wrote:Or you could completely disassemble and reassemble your wiring harness...
thanks everyone!! another mystery solved!