Author Topic: 1976 CB550F1 (what have I let myself in for) Project  (Read 31090 times)

Offline eight0

  • SOHC Expert
  • Posts: 277
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #75 on: September 06, 2020, 07:45:09 PM »
Well finally after moving house and now having my own garage and workshop setup I took the plunge ans split the cases.

[ Guests cannot view attachments ]

Lots of sludge in the bottom but no surprises really. Gears and dogs all look in good condition. No play in the bearings.

Do these shells look like they can be re-used? I'll just post a few images as they're all similar.

[ Guests cannot view attachments ]

[ Guests cannot view attachments ]

[ Guests cannot view attachments ]

[ Guests cannot view attachments ]

Also, I want to get the engine cases, head etc painted, the barrels re-bored and a slightly damaged fin repaired. Is there a one-stop shop that someone can recommend to do this for me?

Cheers

Offline Bryanj

  • Grogu
  • *
  • Posts: 10692
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #76 on: September 06, 2020, 08:34:35 PM »
See Trigger for the work and those shells are not the best but OK to use if the clance platigauges ok

Offline eight0

  • SOHC Expert
  • Posts: 277
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #77 on: September 14, 2020, 12:13:05 PM »
Before I send the engine parts off for acid dipping,  Is this an issue? I felt no play in the bearings when the cases were together but these look pretty worn.

[ Guests cannot view attachments ]

[ Guests cannot view attachments ]

I also can't get that bearing dowel pin out. Tried heat and pliers.






Offline Bryanj

  • Grogu
  • *
  • Posts: 10692
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #78 on: September 14, 2020, 01:31:20 PM »
As long as you have the locating pegs and half rings it should br ok

Offline eight0

  • SOHC Expert
  • Posts: 277
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #79 on: September 14, 2020, 02:37:07 PM »
Yeah I thought it looked like it has been spinning.

There was a mess of oil and crud by the sprocket, hard to tell if it was from the chain or not though. I was wondering if someone else had been into it as there was a fair amount of sealant and it is brown in colour.

Offline Trigger

  • Grogu
  • *
  • Posts: 8434
  • Engines built on reputation, not advertising.
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #80 on: September 14, 2020, 05:42:26 PM »
Only two things cause that surface damage, 1) the cases were not bolted down or 2) the bearing seized and spun in the cases  ;)

Offline eight0

  • SOHC Expert
  • Posts: 277
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #81 on: September 16, 2020, 07:33:07 PM »
Hopefully someone can advise me here.

I want to paint the engine. Countless posts have said not to get it blasted with any medium because of the complicated oil galleries and acid dipping is the way to go. I found a company who can do cast aluminium safely: surfaceprocessing.co.uk but I'm in London and they're in the Midlands.

Does anyone know a place near London? Everyone I speak to says 'you don't acid dip engine cases!' To anyone who has posted a disassembled engine before, what's the way to go? Separate boxes? 


Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
  • Grogu
  • *
  • Posts: 8205
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #82 on: September 16, 2020, 10:05:45 PM »
Ideally, you need a large, heavy duty box. Wrap each part of the engine in bubble wrap, then wrap cardboard around it and pack into the box with extra packing to stop movement. Get a box that you can close secure with cable ties. Something similar to this :-

[ Guests cannot view attachments ]
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline eight0

  • SOHC Expert
  • Posts: 277
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #83 on: September 21, 2020, 11:25:03 AM »
This engine just gets better and better.

No idea how I didn't notice this before.

[ Guests cannot view attachments ]

[ Guests cannot view attachments ]

[ Guests cannot view attachments ]

Offline Bryanj

  • Grogu
  • *
  • Posts: 10692
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #84 on: September 21, 2020, 11:47:48 AM »
From memory i dont think that matters as the cam chain is enclosed and the head bolts sealed

Offline AshimotoK0

  • Grogu
  • *
  • Posts: 7352
  • Mad Scientist.... more power Igor ! ٩(̾๏̮̮̃̾๏̃̾)۶
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #85 on: September 21, 2020, 01:49:05 PM »
I am not so sure that the 'acid' dipping is actually acid but is something like dichloromethane (methylene chloride) / de-carbonizing agent  mixture that removes stubborn carbon deposited in the 'pits' of the casting  too.

I think any kind of real 'acid' would be a most definite no-no, however mild it is..... but what I described above  should be perfectly acceptable.
« Last Edit: September 21, 2020, 01:51:50 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline eight0

  • SOHC Expert
  • Posts: 277
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #86 on: September 21, 2020, 02:26:08 PM »
Seem to recall they are meant to be there for oil drainage back to the sump.

Ok checking other images (which I probably should have done first) it does look like they are supposed to be there. They are just so uneven they don't look like they are meant to be.


Offline K2-K6

  • Grogu
  • *
  • Posts: 5232
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #87 on: September 21, 2020, 03:05:10 PM »
Seem to recall they are meant to be there for oil drainage back to the sump.

Ok checking other images (which I probably should have done first) it does look like they are supposed to be there. They are just so uneven they don't look like they are meant to be.

Aren't they going the other way?  Just crankcase air vents leading to the air plenum and vent hose on top of engine.

Most engines vent out from highest point to avoid as much as possible the risk of pushing oil out under "ahem" extreme use.  :)

The cover over the cam chain acts as a baffle to prevent oil flinging too.

Offline eight0

  • SOHC Expert
  • Posts: 277
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #88 on: December 22, 2020, 10:55:31 AM »
Been falling behind on posting progress, but with all the time given back to me this Christmas I hope to make some headway and will post up some pics (and some questions no doubt).

I got the frame, tank and seat back from LV customs, I'm sure it wont be to everyone's taste, but I'm very happy with it.

[ Guests cannot view attachments ]

[ Guests cannot view attachments ]

Offline simonc

  • Newbie
  • Posts: 34
    • View Profile
Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #89 on: December 22, 2020, 11:27:06 AM »
paint looks good
one job leads to another
cb72 1964
cb550f1 1976
cb550f1 1976
cb550 1977 with cb 500k engine

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal