Author Topic: She's home.. '76 CB550F  (Read 1046 times)

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Offline grcamna2

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Re: She's home.. '76 CB550F
« Reply #25 on: March 10, 2025, 05:26:29 PM »
Welcome to the forum;you'll receive lots of good help here.
75' CB400F/'bunch o' parts'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline newbiecb550

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Re: She's home.. '76 CB550F
« Reply #26 on: March 10, 2025, 06:16:37 PM »
Crap! Just saw on the thread linked below it’s for a K model. Do the 1976 F and K models have different airbox styles?

http://forums.sohc4.net/index.php/topic,151576.0.html

Offline newbiecb550

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Re: She's home.. '76 CB550F
« Reply #27 on: March 10, 2025, 06:54:09 PM »
Did a bit of research including the parts list photo. Looks like I do have all the parts minus the oval bolt, a few spacers and the filter screen, which someone said on Facebook I could just use uni filter. Thanks to another thread I found, it looks like those brackets with a welded nut are what hold that air cleaner duct in place.

Going to buy tappet covers, want them in non-chrome. What do you all think of getting them from here? I saw them on Common Motor Collective and Dime City Cycles. I've been reading 4into1 sells junk. Unless someone has a better option...

https://carpyscaferacers.com/shop/shop-our-store/motorcycle-parts-accessories/honda-cb500-cb550-cb750-parts-upgrades/honda-cb-tappet-covers/?gQT=2
« Last Edit: March 10, 2025, 07:19:39 PM by newbiecb550 »

Offline Stev-o

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Re: She's home.. '76 CB550F
« Reply #28 on: March 11, 2025, 10:25:40 AM »
Crap! Just saw on the thread linked below it’s for a K model. Do the 1976 F and K models have different airbox styles?

I've had both bikes, there are minor differences especially with the top, the K had a place for tools, the F had tools in a different location.  Check the fiche for part numbers, then you will know which parts are the same [if the numbers match]

https://www.partzilla.com/catalog/honda/motorcycle/1976/cb550f-a-super-sport-550-four/air-cleaner

https://www.partzilla.com/catalog/honda/motorcycle/1976/cb550k-a-550-four/fuel-tank-air-cleaner

PS. Bookmark the fiche for your bike, it is very helpful for assembly and gathering info and part numbers for ordering.

'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline newbiecb550

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Re: She's home.. '76 CB550F
« Reply #29 on: March 11, 2025, 11:40:56 AM »
Crap! Just saw on the thread linked below it’s for a K model. Do the 1976 F and K models have different airbox styles?

I've had both bikes, there are minor differences especially with the top, the K had a place for tools, the F had tools in a different location.  Check the fiche for part numbers, then you will know which parts are the same [if the numbers match]

https://www.partzilla.com/catalog/honda/motorcycle/1976/cb550f-a-super-sport-550-four/air-cleaner

https://www.partzilla.com/catalog/honda/motorcycle/1976/cb550k-a-550-four/fuel-tank-air-cleaner

PS. Bookmark the fiche for your bike, it is very helpful for assembly and gathering info and part numbers for ordering.

Yup I finally figured that out last night which is a great reference like you said. That’s how I figured out that the duct was good and the tray wasn’t meant for my bike.

Offline Little_Phil

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Re: She's home.. '76 CB550F
« Reply #30 on: March 15, 2025, 10:32:48 AM »
Yes the airbox top is different and no tool tray on the F, Tools stored in rear of seat. The top air duct is mounted on those brackets with the welded on stud with a couple of elaborate wing nuts that are often missing, but any M6 wing nut will do. The tappet covers always seem to fit a 16.8mm spanner. So always use a six sided socket on them.

Offline newbiecb550

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Re: She's home.. '76 CB550F
« Reply #31 on: March 19, 2025, 04:27:47 PM »
Got a bit more work done this past week. Makes it harder as the shed the bikes stored in is not by me, so I also don't have all my tools. Anyways, so a lot of not so great things happened.

First, couldn't get off the last tappet cover on #1 intake side. Very stuck. Luckily my buddy had a neat socket I haven't seen before, forgot to snap a pick, that I tapped on and broke it loose.

Then proceeded to adjust all the valves, first time for me doing that. Pretty easy minus #3 cylinder exhaust was a pain for some reason. About 6 or 7 I couldn't get the feeler gauge through until I loosened it, can't imagine the last time they had been adjusted. Also got in new tappet covers from Common Motor but they were not like the photo on the website, too shiny for me as I wanted the stock flat look. So waiting to hear back and will likely buy someplace else.

Figured I'd change the spark plugs, think I forgot to snap a photo of all 4 laid out. Unfortunately on #4 cylinder, something must have happened and when it broke loose, it took part of the top threads with it. Whole plug is black so I’m thinking it was already damaged and shooting carbon out of the cylinder. Bike ran alright when I bought it. Did some research and bought a Time Sert kit to repair it. Just came in today and watched a few videos on how to, looks easy enough. Will tackle that soon. Did finish the rest of the plug change, had NGK D7ES before and threw new ones in. They were just black from running rich.

Carbs have been received and getting rebuilt now. Also ordered a push throttle cable as I jacked mine up as I had mentioned, hasn't shown up just yet. Got a Ricks regulator/rectifier but want to get the bike running again before I go crazy replacing parts.

Started trying to piece the stock airbox I bought together. Such a tight fit with just the brackets, I'm not sure how the plenum box fits in to it. In fact, it won't. So I'll need to spend more time with that. Also one of the boot thingys on the plenum is ripped and I don't see a P/N on the diagram. Sooo.... yeah. Carbs will most likely be back next week and I'm hoping to have the throttle cable and Time Sert installed by then. Hopefully I sort the airbox debacle out as well so I can start her up. Also tried taking photos of the chain slack. Not sure if the rear tire is suppose to be on the ground but its more than 3/4" of slack as you can see. Chain needs a good clean too.

« Last Edit: March 19, 2025, 05:28:02 PM by newbiecb550 »

Offline newbiecb550

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Re: She's home.. '76 CB550F
« Reply #32 on: March 19, 2025, 05:21:28 PM »
More…
« Last Edit: March 19, 2025, 05:24:17 PM by newbiecb550 »

Offline Stev-o

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Re: She's home.. '76 CB550F
« Reply #33 on: March 20, 2025, 07:23:23 AM »
That head may have already had a repair done to it.

As far as the black plugs, you need to confirm the carbs will be getting genuine Keihin jets in the proper size.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline newbiecb550

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Re: She's home.. '76 CB550F
« Reply #34 on: March 24, 2025, 10:29:44 AM »
I’ll confirm that, just waiting on the carbs to get shipped back. Got my Time Sert kit in so hopefully I can knock that out this week. Also received a new push throttle cable. May be a few inches longer, hopefully that’s not an issue. Will change the bars down the road. Also snapped a photo of all the plugs, 1 thru 4 respectively.

« Last Edit: March 24, 2025, 10:31:42 AM by newbiecb550 »

Offline newday777

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Re: She's home.. '76 CB550F
« Reply #35 on: March 24, 2025, 10:59:56 AM »
You want to look inside the ceramic to get your color reading
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline newbiecb550

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Re: She's home.. '76 CB550F
« Reply #36 on: March 24, 2025, 11:07:54 AM »
Thanks, I posted #4 a few posts up which looks carbon fouled. I’ll take a better photo of them this week.