Author Topic: Down on her luck 1977 CB550K - Severely Updated.  (Read 8699 times)

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Offline Sporkfly

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Down on her luck 1977 CB550K - Severely Updated.
« on: June 16, 2008, 11:41:49 AM »
Mid-summer 2006 I got hyped up about getting a motorcycle. My cousin overheard my plans and offered up his 1977 Honda CB550K as it had been sitting in his barn for a couple of years, before he parked it he could only get it to run with the choke on and as soon as there was any throttle at all it would bog down even when it was running nice and hot. If the choke was put in it would immediately stall.

All I had to do was truck it home, and the tear down began the next day. I've lost a lot of the picture from the beginning of this over the past year. It's been such a long project because I had a possessive clingy lady friend, she'd get a little whiny when I spent too much time without her. The old catch 22 of choosing the loving woman or the engine. Well, I chose the engine and the project is moving along nicely now.

This is the day I got it home. I had more pictures of it in this state from a good number of angles. There was a dent in the other side of the gas tank, looked like somebody laid her down or just carelessly dropped it while it was parked. It had a few minor dings on the top of the tank as well.



30,000 miles give or take

First thing I did was order a gasket set for that engine, and in the midst of this discovered why it wasn't running (it would've been an easy fix but I already had the engine torn down), one of the plug wire caps wasn't connected, but the boot was still in place so it didn't appear amiss. 1 of the 4 cylinders wasn't firing. Ah, well, new gaskets and seals never hurt. The internals of this engine didn't show the bike's age, it was clean as a whistle with minimal wear - too bad the outside isn't as clean as the inside. The sprockets were sharper than sharp, don't know how that chain didn't slip before it was parked. The chain didn't look too pretty either. Carbs had no return on them, they were so tight the spring couldn't even pull them back to idle. Tires are bald, not the originals either. I managed to wrangle up a pair of 1973 550 original tires - not dry, 85% of the tread left!

I ground off all of the old paint, it was kind of a pathetic job of layer upon layer of paint. They painted over the original paint, which is really too bad - there was what seemed like an 1/8 inch of paint and primer and bondo. The bottom seam (as you can see in the photo, the grey strip) was JBwelded and poorly. I bought a tank lining kit from POR-15 and I definitely back that product, did wonders for me. I cleaned and removed the rust, etched the steel and put the tank liner (aluminum enamel based or something, tough stuff!) in. I did exactly what the previous owners did to the tank, JBwelded all of the holes (and nicely mind you!); although I pulled the dents with a spot welder and slide hammer and bondo'd them. I bondo'd over the Honda logo brackets for a smooth tank, inspired by my dad's Shadow. She's been wire brushed, sandblasted, and rust proofed to boot. Hopefully it holds up.

I'm going to take a step back from the project itself now to explain some of the issues I've run into due to a major event. In February of 2007 we had a garage fire. The bike was in there. I got the engine out before the fire really got going, but everything else was smoke damaged heavily. I'm grateful I got the engine out. During the fire a box of smaller parts was kicked around, sprayed around... I lost quite a few smaller things for the bike and I'm only just running into some of them as I put it back together. The sprocket plate, special washer for the timing advance, bolts for mounting the engine, gear for the tach cable, return spring for the brake pedal... I put some original handlebars back onto the bike, again from the '73 550, because the chrome on the ape hangers was smoked. I didn't like them anyhow, and they didn't allow me to top up the master cylinder.

My aunt reupholstered a seat I found on eBay, the pan is a bit rough but the upholstery and the foam are nice now.

I think for now I'll just leave this post where it is and give you parting pictures, the most recent I've taken. I'll organize this thread a bit more and give more details later on. Sorry for the bad lighting and all that!

Cheers



« Last Edit: March 20, 2009, 08:00:42 AM by Sporkfly »
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline BlindJoe

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #1 on: June 16, 2008, 01:29:05 PM »
Too bad about the fire;I think you made the right choice in choosing the engine over the girl though ;D. Looking  good.

Offline Klark Kent

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75 CB550k
76 Moto Guzzi 850T-3FB LAPD- sold
95 KLR650
www.blindpilotmovie.com

download the shop manual:
http://forums.sohc4.net/index.php?topic=17788.0
you'll feel better.

listen to your spark plugs:
http://www.4secondsflat.com/Spark_plug_reading.html

Offline bzr

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #3 on: June 16, 2008, 06:57:57 PM »

All I had to do was truck it home, and the tear down began the next day. I've lost a lot of the picture from the beginning of this over the past year. It's been such a long project because I had a possessive clingy lady friend, she'd get a little whiny when I spent too much time without her. The old catch 22 of choosing the loving woman or the engine. Well, I chose the engine and the project is moving along nicely now.
At first I thought this was a metaphor for a previous bike.  :D

Glad you got rid of the ape hangers, it looks far better in black than whatever that lilac purple thing was. Stick with it, a little fire isn't the worst of it!
1976 Honda CB550F

Offline Hush

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #4 on: June 17, 2008, 03:20:01 AM »
Dang fire, hope you got your exhausts out too, they look good in your first photo.
It's them little bits you are going to have to scrounge around for that's gonna pee you off, but hang in their dude.....Hush.
I think the thing I most like about motorcycling is the speed at which my brain must process information at to avoid the numb skulls who are eating pies, playing the ukulele, applying make-up etc in the comfort of their airconditioned armchairs as they make random attempts to kill me!!!!!!!

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #5 on: July 21, 2008, 08:56:45 PM »
Where I'm at now:

Alright she's back together. I don't have pictures and I have electrical issues.

I pulled connectors and cleaned up the blade terminals/female connectors. This improved the brightness of my lights, but I have a recurring problem. A few actually. My main fuse gets very hot, I didn't locate any grounded wires or anything and I"m confused as to why the fuse isn't popping with how hot it gets. It's not getting AS hot with the contacts a little cleaner than before. No brake lights. Turn signals don't flash. I took the headlight off before cleaning the terminals to check for grounded wires, but prior to that my high beam didn't work. The starter turns and I have arcing at the points, so that's a decent sign, yeah? Afraid to try and start her up with that fuse going hot.

Suggestions on where I should take the multimeter to? Also any leads on where to get a flasher unit or how to make my own?

And on the note of electrics, I'm thinking of replacing the old fuse box with, no not blade fuses, but a circuit breaker panel.
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline TwoTired

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #6 on: July 21, 2008, 10:07:34 PM »
The main fuse should run warm, but not so hot you can't hold you're thumb on it.
The fuse clips must be clean, bright, and shiny and have a very firm grip on the the installed fuse.

The fuse was sized to run the stock electricals.  If there have been "upgrades" like higher wattage lights, low ohm coils, etc., then the fuse will run hotter as it draws current closer to it limit.

Cheers,
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #7 on: July 22, 2008, 05:09:09 AM »
The main fuse should run warm, but not so hot you can't hold you're thumb on it.
The fuse clips must be clean, bright, and shiny and have a very firm grip on the the installed fuse.

The fuse was sized to run the stock electricals.  If there have been "upgrades" like higher wattage lights, low ohm coils, etc., then the fuse will run hotter as it draws current closer to it limit.

Cheers,

I've got 3.0 ohm dyna coils on her, but I have a 1.82 ohm ballast resistor in there. I think the fuse is running 'warm' now, before it was definitely getting to the point of not being able to touch it. I replaced one of the blade terminals in a connector (for one of the main wires) as there was a hole in the insulation and corrosion on the wire interior.

I'll see what more I can do with connections and hook my headlight back in today after work to see if my high beams are working now. I'll test my brake light switches if I can find my multimeter, I have an extra one for the front brake, but not for the brake pedal. I might just work with the one I have to see if I can make it work? Considering just making this a rat bike as a daily commuter.

And again, any leads on flasher relay assemblies would be appreciated. I really want to try my hand at making one.
« Last Edit: July 22, 2008, 10:42:54 AM by Sporkfly »
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #8 on: July 22, 2008, 07:27:58 PM »
New issue:

I sorted the electronics (nearly). I've still got to get a new flasher unit in, but I have brake lights, huzzah! The fuse is only getting marginally warm now...


I tried turning her over. She won't start. I'm not getting spark. I have stock points (new condensers, new points) and they are arcing. Anyway, I'm not getting spark at the plugs. I've got dyna coils, the stock ones had a wire broken and a cap broken so I replaced them. I actually discovered that the wires are changeable (with some modification) by doing a little research today. Anyway, I have a 1.82 ohm ballast resistor in because the coils are 3 ohm. I'm thinking maybe there's just a bad connection with the plug wires, but I want to test the coils. Does anybody know where I should be putting my multimeter to test for primary resistance? My meter only goes up to 1k ohm so I can't really test the secondary coil resistance.

EDIT: IGNORE THAT! She purrs like a kitten! Not getting fuel to all the carbs at the moment, however. Still having issues with lights, I'll be following wires after I get the carbs synced and providing fuel nicely.
« Last Edit: July 23, 2008, 08:21:37 PM by Sporkfly »
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Hush

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #9 on: July 24, 2008, 04:42:29 PM »
Carbs on all these Honda 4's will drive you nuts.
As for a flasher unit, because the system is 12 volt you could just chuck in any old automotive flasher unit, mines running something off a Suzuki and although it flashes faster than it should I kinda like that as it really catches the eye and should warn tintop drivers that I am turning. ;D
With the carbs it's a matter of clean clean and clean again until you get the culprit.
You are lucky that your carbs don't leak out of overflows as most neglected Hondas have this problem, easily fixed by replacing float valves.
Best of luck.........Hush.
I think the thing I most like about motorcycling is the speed at which my brain must process information at to avoid the numb skulls who are eating pies, playing the ukulele, applying make-up etc in the comfort of their airconditioned armchairs as they make random attempts to kill me!!!!!!!

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #10 on: October 19, 2008, 03:38:55 PM »
Ok, been putting this thread off a little. Current project is cleaning the engine up now that I know it runs, I've spec'd things out and I might need some new valves. The seats need some TLC, the guides are to spec, valves could likely be reused just touching up the seats, but at the same time I might be better off replacing the valves... Expensive investment though and I'm trying to keep the cost down.

Anyway, tested that homemade blast cabinet with good results. I bead blasted everything but the case. My only issue now is removing the flaky chrome as there was no way I was getting rid of it with 80 grit bead. Tappet covers have a little left on them, clutch cover is mostly there with a number of spots that the chrome was bubbled and flaking. Any suggestions on getting rid of it?

Started on the painting. The bike will be taking on a steampunk influence.

Pictures!







A little nicer than that black, wouldn't you say?

Edit:

Other things I've done include -

* New Rectifier
* Replaced many of the clip connectors with soldered or bullet connectors, depending on application
* New Fuse Box for a  tighter, cleaner and all around better fuse connection. My main fuse now runs nice and cool with the stock 15 amp fuse.
* Chased an oil leak to the oil pump cover. The 47mm o-ring needs to be replaced still, my pump is apart but I have to source the proper o-ring.
* Purchased a caliper and replaced the piston and seal in it. The casting on mine cracked around one of the bolt holes.

I've also torn the top end apart again, as you can see. When I first started this bike I didn't know what I was doing really. I know better now, and I've been checking if things are in spec and usable. I am also looking at dropping in a 650 cam. Tank has been repainted as I pulled a stupid and was working with the caliper near the tank. You guessed it, brake fluid on the paint job. It's all good though because I did a horrible job on that paint job. I'm correcting a lot of my mistakes and I'm alright with that because it's a sohc4!

Edit 2:

Also, got rid of those ugly apes and put on some '73 550 bars. May go to clubmans.
« Last Edit: October 19, 2008, 04:09:01 PM by Sporkfly »
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline moham

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #11 on: October 19, 2008, 05:14:59 PM »
I've had real good luck with these guys for all OEM stuff, their prices are at or below other dealers and they tend to stock stuff others don't, shipping is reasonable at $10 a load, so it pays to wait until you need a couple things before ordering...here's a link for your oil pump gasket:

http://www.discounthondaparts.com/fiche_section_detail.asp
78 750K-The Ocho
74 550-The Cherry Picker
70 750K0 motor-Dick in a Box

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #12 on: October 19, 2008, 05:56:32 PM »
The O-ring is not sold individually, it would require buying an oil pump. It's behind the rotor cover. It's 47mm and I may buy an o-ring kit just to have around as one of those "useful" things.
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline moham

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #13 on: October 19, 2008, 06:05:27 PM »
That's odd because they list it separately with its own part number (O-RING 47X3.2 91302-250-010, $3.89). I've purchased many o-rings and gaskets individually, even at the local Honda dealer (which is not the cheapest way to do it, but...) Anyway, a set would probably be cheaper and like you said, you'd have them around.
78 750K-The Ocho
74 550-The Cherry Picker
70 750K0 motor-Dick in a Box

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #14 on: October 19, 2008, 06:20:09 PM »
That's odd because they list it separately with its own part number (O-RING 47X3.2 91302-250-010, $3.89). I've purchased many o-rings and gaskets individually, even at the local Honda dealer (which is not the cheapest way to do it, but...) Anyway, a set would probably be cheaper and like you said, you'd have them around.

My mistake, it's not the 47mm O-ring. That's the one that sits between the pump and the engine case. The one behind the cover is thinner diameter and IIRC 50mm... They don't even show it on the fiche, and I think this was discussed in another thread. Honda would rather you buy a whole new oil pump than replace the leaking seal.
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #15 on: October 20, 2008, 07:46:41 PM »
My side covers are trashed. Well, my left side cover is trashed. My right one doesn't exist. Good ones are pricey, somewhat hard to find and when it comes down to it even new ones are brittle plastic. I have yet to see the new blow molded covers for the '77 550. So while I wait to figure out where and how I should finish painting my engine (as stated previously the garage burnt down and we still haven't gotten the permit to rebuild the damn thing).

So here's my fix/work around. I bought two cash boxes (found two with matching locks!) from an office supply store. The better quality ones (ie sturdier steel, hinges and lock) all had a handle in the top. I figured I'd deal with it, and I made a run up to the hardware store and bought a small sheet of 22ga steel. I can't weld in any acceptable sense (where the heck is Martino when you need him...) and I think rivets will add a nice touch. I'll paint the boxes hammered black to match my tank's (new) paint job. The steel plate and rivets will get the copper to match the engine. Pictures of the tank's new paint job will come when I get around to taking them. For now, the start to my battery and electrics boxes:









« Last Edit: October 20, 2008, 07:48:44 PM by Sporkfly »
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #16 on: October 21, 2008, 12:23:20 PM »
Just picked up a filter for my crank case via feebay for $14. Kind of matches the Emgo taper pods. Since I'm running pods I'd rather not be sucking dust into my crankcase through the breather.



My two boxes are nearly complete as well, I'll mock them up on my bike for pictures when I do finish them up.
« Last Edit: October 21, 2008, 12:26:09 PM by Sporkfly »
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #17 on: October 22, 2008, 05:48:26 PM »
More copper. I have an actual piece of copper in both photos. It is next to the starter cover and oil pan. I'd say the paint is pretty accurate, and the pictures don't quite do it justice.





I'm happy with the results. I still need to paint the clutch cover, cylinder head, rocker cover, breather cover and case. Rocker cover, breather cover and case will be Rustoleum BB-Q black. Mufflers are going to have the baffles removed, they're rattling around in there, and replaced with my own fabrication of some sort. Holes in the exhaust will be brazed, large amounts of grime and rust cleaned off and painted copper. The headers will be wrapped in black exhaust wrap to cover up a number of deep scratches and dents.

1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline DaytonGuy

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #18 on: October 27, 2008, 12:06:03 PM »
Any updates on this project?  The copper bits have me intrigued to see a final product.  Looks cool so far!

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #19 on: October 27, 2008, 01:05:29 PM »
I've finished the boxes for the sides (nearly, still need to clear coat and polish). Beyond that work and school has been keeping me busy (almost too busy). It's been slow tinkering since university has started back up, but it will likely be done by spring.

I need to find a CB650 tach drive gear as I'll be dropping in the 650 cam (mine is chewed up a bit). PO stuck a 750 tach on the bike and the 650 and 750 tach had the same ratio from what I gathered so that's one less thing I need for the conversion. I might do some mild porting while the head is off.

Rings and valves are within spec so I won't be monkeying with that too much. Not tearing down the bottom end as I don't want to venture into territory I don't have to (looked at gears through the bottom end and didn't notice anything amiss) and I don't have the money for the main bearings and such.

And, I need to find a different seat. I have a pretty nice king and queen seat, but as far as style goes it's not my thing.

Once I get the pipes done I'll do some mock up and get more pictures posted.
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #20 on: October 27, 2008, 06:03:12 PM »
Update: Just got (won) my 650 cam. Anybody have a tach drive gear?  :)
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #21 on: October 29, 2008, 07:30:05 PM »
Top end mock up:

1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Shenanigans

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #22 on: October 29, 2008, 07:43:54 PM »
You might want to consider routing some tubing to the rear of the engine then putting the crank filter on the end of that. I say this because I did the same thing and as cool as it looks whenever there is oil vapor it will pool and just drip down out of the filter onto your nice clean engine.
   This pretty much sums it up.   76' CB592 cafe. 69 750 project, 03 CBR954, 75 750 super sport.

Offline Sporkfly

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #23 on: October 30, 2008, 02:54:09 PM »
You might want to consider routing some tubing to the rear of the engine then putting the crank filter on the end of that. I say this because I did the same thing and as cool as it looks whenever there is oil vapor it will pool and just drip down out of the filter onto your nice clean engine.

Thanks for the tip  :). I considered running it towards the back of my engine anyway, but I had a few options in mind. Nice to know, now I'll cross some of those options off my list.
1977 CB550K
1979 GL1000 - Current project, winter '09-'10
1979 CX500
1976 Suzuki GT500 Titan

Offline Nicolai

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Re: Down on her luck 1977 CB550K Rebuild
« Reply #24 on: October 31, 2008, 04:29:00 AM »
That copper paint looks real nice. Can you give me some more info on which paint you used?
Looking forward to see pictures of the engine all together...
'77 CB500 K3