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Author Topic: 1976 CB550F "Barn Find"  (Read 21501 times)

Offline snmavridis

  • Posts: 407
  • Gettin my life together. One bolt. At a time.
Re: 1976 CB550F "Barn Find"
« Reply #30 on: Oct 05, 2012, 22:18:03 »
they didnt blink prior to the disassembly either. i thought i would see the issue in the wiring when i replaced them, but i couldnt see anything going wrong.

Offline danmpls

  • Posts: 103
Re: 1976 CB550F "Barn Find"
« Reply #31 on: Oct 05, 2012, 22:22:00 »
make sure all of your grounds are good too.

Offline snmavridis

  • Posts: 407
  • Gettin my life together. One bolt. At a time.
Re: 1976 CB550F "Barn Find"
« Reply #32 on: Oct 06, 2012, 18:13:54 »
Replacing the throttle cables turned out to be harder than i thought. I tried to install them and this is what happened. 1st pic is closed throttle, second is WOT. No matter how i rearrange them there is too much slack. third picture is the terrible wiring mess that is my front end. just so you know what im dealing with here.

Offline danmpls

  • Posts: 103
Re: 1976 CB550F "Barn Find"
« Reply #33 on: Oct 06, 2012, 20:41:27 »
Your throttle cables need to go over the headlight, down the left side of the frame through the hole by your coils, and then attach to the carbs.

Offline snmavridis

  • Posts: 407
  • Gettin my life together. One bolt. At a time.
Re: 1976 CB550F "Barn Find"
« Reply #34 on: Feb 26, 2013, 04:09:52 »
been a while since i made progress on this thing. its winter time, so i thought id go through the regular maintenance the bike would need. i plan on cleaning the carbs and getting the proper synchronization down, then check my points, timing and spark plugs. just to make sure everything is sound so it will run properly.

first picture is the bikes new home, in our basement in what we call the "rape room". no gas in the bike so the water heater issue is in check. took the seat and gas tank off to work on her with no hassle. after copious amounts of WD-40 and at least two hours of jimmying, i managed to pull out the carbs (second picture). what i noticed was that the rubber piece between the airbox and carburetors had what looks like a missing tube(third picture). it looks like it dried out and fell off. the clip is still holding some of it onto the piece. then i found a tube (fourth picture) that was disconnected from everything but was underneath the airbox through the frame aimed at the ground. now before any wise ass says anything, yes i checked if the missing tube was that loose one, but theyre different sizes. the loose tube doesnt fit the rubber piece.

thats my update for now. my schedule is much more flexible this semester, so i should be able to work on it at least once a week for a good amount of time. hopefully i'll be making progress on a weekly basis.





Offline snmavridis

  • Posts: 407
  • Gettin my life together. One bolt. At a time.
Re: 1976 CB550F "Barn Find"
« Reply #35 on: Feb 28, 2013, 02:30:47 »
i found some time in my day to go down to the basement and get wrenching. i pulled the spark plugs to inspect them and just see whats going on, and found that they are all dirty and sooty. definitely helping me verify my initial thoughts on the performance of the carburetor, the damn thing isnt set properly. too much gas going into the engine. or it means my timing is messed up, which i need to adjust and inspect soon anyway.

before brushing


after brushing

Offline snmavridis

  • Posts: 407
  • Gettin my life together. One bolt. At a time.
Re: 1976 CB550F "Barn Find"
« Reply #36 on: Mar 11, 2013, 00:28:48 »
Got my uni carbs and new jets a couple days ago, got working on the carbs today. cleaned out the float bowls, cleared all of my little bits and pieces, replaced my jets, set the needle a little higher and found out a couple things.

the guy who worked with my bike last was supposed to set everything to factory settings. he didnt. most of the locks on the washers werent touched. the needles werent set to the middle, they were one from the top, now theyre one from the bottom to compensate for the pods per the instruction in the filter packaging and stuff ive seen on the forums. the slide on my number three is all chewed up at the bottom. someone really screwed with these carbs.

next thing i have on my list is to set the timing properly. after that, gunna start her back up again. i'll post pics later

Offline swan

  • DTT SUPPORTER
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  • Posts: 1004
  • Kickstart, shift on right, drum brakes and spokes
    • 1962 BSA Gold Star barn find restoration
Re: 1976 CB550F "Barn Find"
« Reply #37 on: Mar 11, 2013, 09:23:09 »
DPO's, dumb previous owners. They never cease to amaze me.
1966 Triton cafe, 1962 BSA Gold Star DBD34, and 1966 T120 Triumph Bonneville.
BSA Gold Star barn find restoration
1975 CB400F Cafe Racer build
1966 Triumph Bonnevile restoration

Offline Tifun

  • Posts: 973
  • Indy
Re: 1976 CB550F "Barn Find"
« Reply #38 on: Mar 12, 2013, 22:13:16 »
Subscribed for another 550 build.
KZ440 LTD Build: http://www.dotheton.com/forum/index.php?topic=61491.0
SOLD: CB550K Build Thread http://www.dotheton.com/forum/index.php?topic=42545.0
Quote from: Angela's Bonus Technique
whawhooshwhawhooshwhawhooshwhawhoosh

Offline snmavridis

  • Posts: 407
  • Gettin my life together. One bolt. At a time.
Re: 1976 CB550F "Barn Find"
« Reply #39 on: Mar 14, 2013, 03:52:07 »
i was going to get working on my timing today, but the screws on the left points cover are tight as hell and theyre stripped a little. im not entirely sure how to approach this one. any advice is appreciated. pics of my progress included below.


My filters from DCC, along with the jets


another shot of the filters


rejetted, as you can see the housing for the jet is a little bit in disrepair. missing some chunks out of it.


another shot of the rejetted carbs.


the slide ive mentioned before that looks all chewed up. no idea why anyone would do it.


pods on the carbs


carbs mounted