Search found 27 matches

by Rocket Man
Sat Oct 19, 2013 10:22 pm
Forum: Technical Discussion
Topic: Resurrected?
Replies: 23
Views: 16026

Re: Resurrected?

Latest update, I went through the spark plug leads and worked all connections and tested resistance. While checking the timing I discovered one lead had only half the spark as the other three. So I added heat shrink tubing to the leads where the compression had reduced the diameter to keep the lead ...
by Rocket Man
Fri Oct 11, 2013 3:10 pm
Forum: Technical Discussion
Topic: Resurrected?
Replies: 23
Views: 16026

Re: Resurrected?

Cool, that really helps a lot. I do have one plug darker than the rest. I will re-visit the spark plug leads as they are 33 years old and some are tight/short. This bike wants to launch, but at low RPMs it acts like a plug is fowling/missing. :P
by Rocket Man
Fri Oct 04, 2013 8:36 pm
Forum: Technical Discussion
Topic: Issues Starting the Engine
Replies: 25
Views: 19974

Re: Issues Starting the Engine

I used high temperature silicon before reading this. I imagine JB weld would have better thermal conduction. So far so good.
by Rocket Man
Fri Oct 04, 2013 8:32 pm
Forum: Technical Discussion
Topic: Resurrected?
Replies: 23
Views: 16026

Re: Resurrected?

All my posts refer to what I have done to the bike. It has low miles and has been recently tuned up. Compression has not been tested yet and I need to pull the plugs. Anyone really good at reading plugs?
by Rocket Man
Thu Oct 03, 2013 8:42 pm
Forum: Technical Discussion
Topic: Resurrected?
Replies: 23
Views: 16026

Re: Resurrected?

I did not de-tune anything. :shock: I have heard that Honda de-tuned their cruiser bikes to sound/run more like a Harley in an attempt to sell more bikes. Anyone else heard of this sort of thing?
by Rocket Man
Wed Oct 02, 2013 8:07 pm
Forum: Technical Discussion
Topic: Resurrected?
Replies: 23
Views: 16026

Resurrected?

:? So my 1980 cb650c is ride-able and fairly enjoyable, but I can't decide if it is not always running on 4 cylinders. I have not done a compression check as the smaller spark plugs holes have been problematic. I do need to analyze my plugs again, so I'll place a picture up when I get to it. But her...
by Rocket Man
Sun Sep 22, 2013 10:35 am
Forum: Technical Discussion
Topic: Acceleration issue
Replies: 15
Views: 12072

Re: Acceleration issue

Live on the coast in central California. Stock exhaust and temperatures have been off, but I think that was corrected after going through the spark plug wire connections. I need a brass feeler gauge, but tightened up the gap with a regular one. Valves adjusted and top end sounds pretty good. I'm gue...
by Rocket Man
Sat Sep 21, 2013 6:15 pm
Forum: Technical Discussion
Topic: Acceleration issue
Replies: 15
Views: 12072

Re: Acceleration issue

The jets all look incredibly clean except for some wear/erosion on the main jets. You can not read the 105 on 2 of them. The accelerator pump gap may have been a bit excessive so I took it to zero gap. I'm a bit hesitant to put it all back together yet because there may still be a hole plugged somew...
by Rocket Man
Tue Sep 17, 2013 8:42 pm
Forum: Technical Discussion
Topic: Acceleration issue
Replies: 15
Views: 12072

Re: Acceleration issue

I have never dealt with a pressed in jet before, but it sounds straight forward enough. This will be strike 3 for removing the carbs. Must be getting good at it by now. :roll:
by Rocket Man
Mon Sep 16, 2013 9:41 pm
Forum: Technical Discussion
Topic: Acceleration issue
Replies: 15
Views: 12072

Re: Acceleration issue

Say it ain't so! No amount of seafoam will clear those pressed in jets over time?
by Rocket Man
Mon Sep 16, 2013 2:34 pm
Forum: Technical Discussion
Topic: Acceleration issue
Replies: 15
Views: 12072

Acceleration issue

I’m restoring a 1980 CB650C with 7000 miles on it and have done the basic tune up and carburetor work and still have an issue. I could use the voice of experience here, so I’ll describe the situation as best I can. She starts up and runs fine on the choke, with a little hesitation as the throttle op...
by Rocket Man
Sun Aug 11, 2013 11:40 am
Forum: Technical Discussion
Topic: correct float height measuring procedure?
Replies: 10
Views: 14457

Re: correct float height measuring procedure?

:roll: :shock: I recently bought a 1980 CB650C in very good shape. Long story short, I have the carbs off for a second time due to a missing accelerator pump O-ring and very low operating temperature on number 2. It will not run much lower than 3000 rpm. I cleared number 4 accelerator pump orifice a...

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