Search found 7 matches

by aaronmagneeto
Tue Jun 22, 2010 10:29 pm
Forum: Technical Discussion
Topic: 1980 CB650 C Carb tuning
Replies: 8
Views: 12578

Re: 1980 CB650 C Carb tuning

Thank you for your response. I will check pump operation and replace filter box.
by aaronmagneeto
Mon Jun 21, 2010 11:33 pm
Forum: Technical Discussion
Topic: dead cylinder
Replies: 4
Views: 2787

Re: dead cylinder

What makes you so sure you are getting fuel into that cylinder? why do you think its dead?
by aaronmagneeto
Sun Jun 20, 2010 9:49 pm
Forum: Technical Discussion
Topic: 1980 CB650 C Carb tuning
Replies: 8
Views: 12578

Re: 1980 CB650 C Carb tuning

I cleaned out the slow jets, and installed new air cut off diaphrams. The bike pretty much idles fine now, but it doesnt respond well during acceleration. It idles fine with no choke at all, but then as soon as you hit the throttle it will want to die. If I choke it half way as im giving it throttle...
by aaronmagneeto
Fri Jun 18, 2010 10:35 pm
Forum: Technical Discussion
Topic: 1980 CB650 C Carb tuning
Replies: 8
Views: 12578

Re: 1980 CB650 C Carb tuning

Thanks guys, I will pull the carbs again and double check to make sure that the idle jets are clear. I will also take care of the idle mixture screws while im at it. I will continue to post.
by aaronmagneeto
Fri Jun 18, 2010 9:38 am
Forum: Technical Discussion
Topic: 1980 CB650 C Carb tuning
Replies: 8
Views: 12578

Re: 1980 CB650 C Carb tuning

Yeah I bumped the pilot screw and it broke off. Previously I cleaned the tank out and ran fuel out of it into a clean container. Do the pilot screws adjust mixture for idle? Its a poor design, since you can't adjust them past a full turn with the bowls in place! I will now have to remove the bowls t...
by aaronmagneeto
Thu Jun 17, 2010 10:07 pm
Forum: Technical Discussion
Topic: 1980 CB650 C Carb tuning
Replies: 8
Views: 12578

1980 CB650 C Carb tuning

Picked up this bike over the past weekend. Its been sitting for 15 years. I pretty much immediately removed the carbs to clean them since I knew they would need it badly. I was very successful in not ruining any of the gaskets, or the fuel accell diaphram. All jet passages came completely clean. How...
by aaronmagneeto
Thu Jun 17, 2010 8:04 pm
Forum: Technical Discussion
Topic: 79' cb650 carbs
Replies: 76
Views: 74040

Re: 79' cb650 carbs

Hey guys, I have an '80 that is doing the same thing. I just cleaned the carbs completely, including every passageway. The only thing that didnt get cleaned were the passages to the air cutoff diaphrams, since you cant access 3 of the 4 covers with the carbs all attatched to one another. My bike wil...

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