Topic: Started to rebuild my CB650C

[wakerider]

Hello all,

I just wanted to give a quick introduction.  I have an '81 CB650C that I am starting to rebuild.  I bought it a few years back, took my roadtest on it and then it died.  I was in college then and did not have time or a place to work on it. 

So far I have bought the rebuild kits for the carbs and have pulled them off the bike.  I started soaking the internals from carb #4 last night.  I was really surprised how clogged up the jets were.  Hopefully, the soaking will clean them up.

I am thinking of putting some kind of sealer in the tank.  Have to do a little research on which type to use.

Then the last thing I have to do is replace the alternator rotor.  I  got the bike running enough this summer(probably way the jets are so clogged) to do the electrical diagnostics and found the rotor to be bad.

Hopefully after all this work I will have a running bike.

Gregg

[dusterdude]

gregg,i recently was given a cb650c myself.its been sitting for a while so im sure i will have carb issues too.keep me posted if you would on your fixin.thanks

[rob]

Hi Gregg,

I have an 81 CB 650 Custom, got it last summer, passed my road test on and it still going.  I am working on reviving it after sleeping outside for the winter and  have had to do a bunch of work on it, mostly brakes and electrical (it was under a porch, and under a bike cover, but the brakes still are in bad shape).  I haven't taken apart the carbs yet, thinking about tackling them this year.  Where did you get the rebuild kit?

Also, have any pictures?  Keep us posted on the progress,

Rob

[n9viw]

My father has an '80 CB650 on which I'm currently doing some carburetor surgery. Where did you get your carb kits? I need all the little bits- o-rings, gaskets, etc- except for the float needles, as I got those from a local shop. I imagine a complete kit will still include the needles, but I suppose I can either hang on to those as spares or sell them separately.
Thanks,

[Bob Wessner]

I imagine a complete kit will still include the needles, but I suppose I can either hang on to those as spares or sell them separately.

If you go with a kit that includes needles, check the current vs. kit needles with a drill bit gauge. This was suggested by a member (kghost I think?) and to my surprise, found the kit needles to be of a different profile, much slimmer toward the low end of throttle settings and ran rich. Not to say you couldn't use them, but it did affect tuning. I went back to the stock needles and they tuned-up nicely.. by my standards anyway. 

[wakerider]

I got the rebuild kit from partsnmore.com  They were $16 a piece. 

Thanks for the heads up on the needles I will check them before reassembly.  I have been soaking one carb a night and I am going to try an reassemble one tonight. 

On a different note, last night I realized that the tubes that connect the carbs together have a broken fitting.  The fitting is a black plastic tee.  Does anybody have a suggested place to find a replacement?  Maybe something down at the hardware store will work?

I don't have any pics yet but, I will take some and post them up.

Gregg