Search found 11 matches

by dr4
Fri Apr 17, 2015 6:26 pm
Forum: Bikes
Topic: 1981 Honda CB650C for sale $1200
Replies: 0
Views: 9148

1981 Honda CB650C for sale $1200

On Craigslist here: http://auburn.craigslist.org/mcy/4956904576.html Location--East Central Alabama (near Auburn), halfway between Montgomery and Atlanta. May be able to trailer it to your location. Hey all, Finally decided to put this one up for sale just when I get it running its best! I've been s...
by dr4
Sat Nov 15, 2014 9:33 pm
Forum: Technical Discussion
Topic: GM HEI: Cheap and Extremely Effective Ignition Upgrade
Replies: 404
Views: 93809

Re: GM HEI: Cheap and Extremely Effective Ignition Upgrade

Just wanted to update my previous post for the record. After the upgrade to the GM HEI ignition, I started out getting 44 mpg, then 42, then 40 etc. My last tank was 36 mpg. Today I pulled the plugs. There was a burn line on the underside of the ground electrode, so I knew what I was dealing with. T...
by dr4
Sat Oct 18, 2014 5:06 pm
Forum: Technical Discussion
Topic: Losing power at high RPM - Resolved
Replies: 1
Views: 986

Re: Losing power at high RPM - Resolved

Glad you found the problem. Made me think, because I've always had the same issue and no matter what I've tried, can't find the solution. I even did the GM HEI ignition upgrade, which i'm glad I did, but it didn't solve this problem. When you say carb vent tubes, do you mean the T tubes that some of...
by dr4
Sat Oct 18, 2014 4:56 pm
Forum: Technical Discussion
Topic: GM HEI: Cheap and Extremely Effective Ignition Upgrade
Replies: 404
Views: 93809

Re: GM HEI: Cheap and Extremely Effective Ignition Upgrade

Hello everyone, Many thanks to everyone for all the input about the HEI ignition upgrade. I was able to successfully build the system and did a 55-mile test drive today. The bike runs incredibly better and smoother. Unfortunately I'm still getting in the 30's on gas mileage which is about where I wa...
by dr4
Tue Jun 17, 2014 10:17 pm
Forum: Technical Discussion
Topic: New here check out my cb650c
Replies: 23
Views: 3484

Re: New here check out my cb650c

Did you happen to do a compression check before you tore it down? If all 4 were near 135-140 you probably won't benefit much from doing the rings. Mine were all around that range dry, and jumped up to 180 when I shot a tablespoon of oil in the cylinder and ran the test again. You should be able to g...
by dr4
Tue Jun 17, 2014 10:17 pm
Forum: Technical Discussion
Topic: New here check out my cb650c
Replies: 23
Views: 3484

Re: New here check out my cb650c

Did you happen to do a compression check before you tore it down? If all 4 were near 135-140 you probably won't benefit much from doing the rings. Mine were all around that range dry, and jumped up to 180 when I shot a tablespoon of oil in the cylinder and ran the test again. You should be able to g...
by dr4
Tue Jun 17, 2014 11:19 am
Forum: Show it off
Topic: New Guy from uk.
Replies: 16
Views: 4781

Re: New Guy from uk.

It might help to really clean certain electrical connections--especially the CDI connections, the kill switch, and in the headlight bucket the black and black/white stripe wires coming from the kill switch. You could also shoot just a little starter fluid in the air intake to get a better start for ...
by dr4
Tue Jun 17, 2014 10:52 am
Forum: Everything else
Topic: My 1980 CB750C Project
Replies: 10
Views: 3500

Re: My 1980 CB750C Project

Nice work! Just out of curiosity, are most of the repairs similar to the 650 from the same time period? I like the exhaust--what kind are they? There's an 82 CB750 for sale at Willie's Cycle that I might try to get, doesn't run but looks in good shape. How's the performance compared to the 650? Woul...
by dr4
Mon Jun 16, 2014 7:48 pm
Forum: Show it off
Topic: 81 Honda CB650 C Introduction
Replies: 6
Views: 2421

Re: 81 Honda CB650 C Introduction

I know this is supposed to be an introduction topic, but while we're on the subject of the advancer--I noticed another side benefit today of getting it freed up. Before, my idle speed would be different at every stop light, anywhere from 1100-1500rpm. Now it settles right down to where it's supposed...
by dr4
Mon Jun 16, 2014 7:58 am
Forum: Show it off
Topic: 81 Honda CB650 C Introduction
Replies: 6
Views: 2421

Re: 81 Honda CB650 C Introduction

Thanks for the thumbs up. Now that its running better I can begin to concentrate on polishing chrome and cleaning it up more. The Cosky manual referenced on this site has part of a page on the advancer. It's under "Electrics"--Ignition, p 17-5. I took it off the bike after turning the cran...
by dr4
Sat Jun 14, 2014 6:44 pm
Forum: Show it off
Topic: 81 Honda CB650 C Introduction
Replies: 6
Views: 2421

81 Honda CB650 C Introduction

http://i1074.photobucket.com/albums/w411/d_rembold/81HondaCB650c_zps2e6e7dfb.jpg This is my daily ride which I bought about a year ago. It barely ran when I first got it. It has a spitfire windshield and throw-over saddle bags now, and I've put almost 5,000 miles on it (started at 9,652 mi.). I'm r...

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