Author Topic: 1976 CB550F - making it good, one step at a time  (Read 124814 times)

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Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #300 on: August 19, 2015, 02:30:28 PM »
I have a spare 550 motor I'm rebuilding for another bike. After seeing your results, I'm following suit on it. I'll leave the 500 as is for comparison sakes though. But stock carbs and the head work and cam look to be a great recipe.

glad someone else give this a go. i think the result is great except if you need that very last bit of topend power. i look forward to seeing what comes out of both of those engines you work on.

Offline SF

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Re: 1976 CB550F - making it good, one step at a time
« Reply #301 on: September 04, 2015, 01:02:34 PM »
Great build
92 wr250 sold
98 zx6r sold
04 zx10r
73 cb350 twin
75 cb550f
75 cb550f
72 r5c
rgid springer bobber project

Offline Restoration Fan

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Re: 1976 CB550F - nut case... stupid mistake
« Reply #302 on: September 11, 2015, 04:34:48 AM »

yes the nut is gone!
i looked with a light but didn't see it. i'll need to take off the cover and hope for the best. i really hope it didn't go far  :-[
OK, that officially sucks.  Sorry to hear that.
Ron

Stella - Logan's Senior Project    78 750K http://forums.sohc4.net/index.php?topic=141761.0

Logan's Reward - CB500 and CB550 Cafes    http://forums.sohc4.net/index.php/topic,147787.0.html

Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #303 on: September 13, 2015, 05:10:19 AM »
resto fan, the nut resurfaced in the meantime and all is good, turned out to be pretty lucky. thanks for your concern!

i'm back from a few weeks in greece where i did my very best to inject money into their ailing economy. man, if anyone wants to see an insane number of honda cubs still being used in everyday life, their villages are practically swamped with them.

after i settle back into normal life i'll pick up the next things:
- get the a/f mix a bit closer to 13 (where you make the most power according to the experts in http://forums.sohc4.net/index.php/topic,150562.0.html)
- now that i see how much torque i got i think i can retard the cam a bit, to get a little more topend
- replace the damaged valve spring retainer (not sure this is necessary but i'd rather do it for peace of mind)
- find and fix that tiny oil leak on the left side

also, thanks a lot for all the interest shown on here and by people in PMs. seems like this thread inspired a few people to go down similar routes with their engine mods which is nice to know. it will be great to see what results you all get.

Offline flatlander

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Re: 1976 CB550F - fair weather bike
« Reply #304 on: September 26, 2015, 07:29:21 AM »
yesterday i took the bike to one of our offices, about 1.5hrs riding on the highway. i got into a really strong downpour, and was also going pretty fast. after a while i had some misfires.

this was the strongest rain i've had on the bike since the rebuilt so kind of a good test... but getting through 3 lanes of traffic over to the hard shoulder with a sputtering, slowing down engine still took some nerves.

anyway, i suspected the coils and lifted off the tank. indeed, after drying off its electrical connections and waiting for the rain to stop, the bike ran again like nothing ever happend.
guess the bike doesn't like bad weather. that's not too good in this wet and chilly country!



the HT wire connections at the front seem pretty well protected with the rubber boots but the connections on the back are less so. i suppose i can try packing them in dielectric grease to keep away humidity.
see how that goes. otherwise i migh have to fabricate some kind of cover to protect them better.
« Last Edit: November 14, 2015, 12:22:48 PM by flatlander »

Offline Stev-o

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Re: 1976 CB550F - making it good, one step at a time
« Reply #305 on: September 26, 2015, 08:57:17 AM »
And/or heat shrink.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #306 on: September 26, 2015, 01:00:36 PM »
cal, makes sense - only that's how i have it already. the electrical connections do point towards the back but seems like in extreme conditions enough moisture gets pushed back there to disturb them.
or did i misunderstand?

i thought i might need to make a hood over them but stev-o's suggestion of heat shrink sounds easier.

Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #307 on: September 26, 2015, 01:17:00 PM »
the picture is right side, starboard ;)

Offline flatlander

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Re: 1976 CB550F - picture time!
« Reply #308 on: September 28, 2015, 12:44:48 PM »
it was time to clean the bike of the workshop and road crud, and make some pictures




















Offline seanbarney41

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Re: 1976 CB550F - making it good, one step at a time
« Reply #309 on: September 28, 2015, 02:13:56 PM »
absolutely not a god damn thing wrong with that bike...beautiful
If it works good, it looks good...

Offline minimo

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Re: 1976 CB550F - making it good, one step at a time
« Reply #310 on: September 28, 2015, 02:17:44 PM »
Gorgeousness.

Offline Stev-o

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Re: 1976 CB550F - making it good, one step at a time
« Reply #311 on: September 28, 2015, 02:28:30 PM »
Love that 550 blue [so much I had to buy one!]
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #312 on: September 28, 2015, 11:43:14 PM »
thanks guys! have a good look now as it won't stay this clean very long. planning a camping trip this weekend, if weather permits...

Offline SOHC4 Cafe Racer Fan

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Re: 1976 CB550F - making it good, one step at a time
« Reply #313 on: September 29, 2015, 08:19:49 AM »
That's quite a looker you got!!
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
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2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
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Offline strynboen

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Re: 1976 CB550F - making it good, one step at a time
« Reply #314 on: September 30, 2015, 09:50:59 AM »
have to update mine 550,,after have seen this photoes....you kosts me a lot of Money....
i kan not speak english/but trying!!
http://forums.sohc4.net/index.php?topic=60973.0
http://forums.sohc4.net/index.php?topic=144758.0
i hate all this v-w.... vords

Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #315 on: September 30, 2015, 01:37:37 PM »
thanks for the comments, CRF and strynboen!
strynboen you still have my old rocker cover... if you find a trick to fix it you can make money by reconditioining all the damaged ones ;)

And/or heat shrink.

did the heat-shrink-trick. let it extend a bit over the flat connection piece, to push against the coil body. that should seal it pretty well.
now i need another big downpour to test.

Offline dbbrian350F

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Re: 1976 CB550F - making it good, one step at a time
« Reply #316 on: September 30, 2015, 04:36:36 PM »
Great work on that bike, looks so good you can be proud for sure.
Bound and determined to restore my...
1974 CB350F1

Lucky new custodian of...
1978 XS1100E

Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #317 on: October 01, 2015, 04:47:55 AM »
dbbrian: cheers! it's now pretty much what i had in mind when i first started looking for candidates in the classifieds...

cal: i'm planning a ride/camping trip over the weekend that i don't want to miss. can you make your storm last another week or so?

Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #318 on: October 01, 2015, 06:20:06 AM »
perfect. then i can even choose between visiting your never-ending storm or wait until the sea levels rise enough to flood amsterdam ;)

Offline flatlander

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Re: 1976 CB550F - making it good, one step at a time
« Reply #319 on: October 01, 2015, 06:36:21 AM »
don't mention the s-word!
there's a snorkel already on my air filter cover so you'd think it's prepared but i might need to extend its reach a little, also hook up the exhaust to it. will the pressure under the sea get me more compression for free?

Offline Stev-o

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Re: 1976 CB550F - making it good, one step at a time
« Reply #320 on: October 01, 2015, 07:06:01 AM »
don't mention the s-word!


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

Offline flatlander

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Re: 1976 CB550F - hiccup cure
« Reply #321 on: October 08, 2015, 12:03:55 AM »
yesterday i got cought in some rain on the highway again. this time the coils had no hiccups whatsoever.
stev-o, thanks for the idea with the shrinkwrap, it seems to work.

Offline Stev-o

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Re: 1976 CB550F - making it good, one step at a time
« Reply #322 on: October 08, 2015, 06:28:06 AM »
yesterday i got cought in some rain on the highway again. this time the coils had no hiccups whatsoever.
stev-o, thanks for the idea with the shrinkwrap, it seems to work.

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

Offline RAFster122s

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Re: 1976 CB550F - making it good, one step at a time
« Reply #323 on: October 08, 2015, 11:16:46 AM »
Would filling the connector with dielectric grease keep water out and protect from oxidation as well?
David- back in the desert SW!

Offline strynboen

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Re: 1976 CB550F - making it good, one step at a time
« Reply #324 on: October 08, 2015, 11:20:42 AM »
on heigh volting like this.,,.elektric grease..just make more problems.
.it holds on dirt..and can not hold against 15,000 volt..it great on light/turn  handel /kontakts,,vho run 12 volt
i kan not speak english/but trying!!
http://forums.sohc4.net/index.php?topic=60973.0
http://forums.sohc4.net/index.php?topic=144758.0
i hate all this v-w.... vords