Author Topic: 400/4 restoration - it begins at last  (Read 1791 times)

Offline Rozabikes Tim

  • SOHC Master
  • Posts: 1182
    • View Profile
400/4 restoration - it begins at last
« on: January 21, 2019, 10:31:49 AM »
Well, stripped the 400 this weekend after about 7 years of ownership when it has sat dormant in the Garage in the main. This is the rough bike a few of you will have seen at Crich the first year we met up.

Mixed findings.

It came apart very easily, including the main stand pivot! PO's have obviously had it apart before which was where the bad was found. The wiring was seriously bad. Cannot believe it ran and everything worked. Bodge aint the word.

The precious 4/1 headers better than expected but think I will still re chrome.

Motor still to come apart.

This is unlikely to be a fully documented thread but I will do my best with piccies and ask loads of questions of you experts out there.


Tim
One day I'll have the time to restore it, not just talk and dream....

Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
  • Grogu
  • *
  • Posts: 8205
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #1 on: January 21, 2019, 10:33:35 AM »
That's great news Tim, well done 👍
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 Athame57

  • SOHC Master
  • Posts: 1122
    • View Profile
    • SeaWitch Artist
Re: 400/4 restoration - it begins at last
« Reply #2 on: January 21, 2019, 11:26:15 AM »
I'll be watching with interest! ;)
I brake for animals!
1978 CB400F2

Offline Trigger

  • Grogu
  • *
  • Posts: 8434
  • Engines built on reputation, not advertising.
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #3 on: January 21, 2019, 11:36:04 AM »
About time  ;)  ;D ;D ;D

Offline Laverda Dave

  • SOHC Jedi
  • Posts: 2530
  • Health is wealth
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #4 on: January 21, 2019, 12:46:58 PM »
Good luck Tim. Back on the road for the spring sunshine ☀
1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'Rat' bike
1982 Laverda 120 Jota

Offline Rozabikes Tim

  • SOHC Master
  • Posts: 1182
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #5 on: January 21, 2019, 10:37:33 PM »
Well I couldn't resist a peep in the motor, so had an hour in the garage.

Problem. PO has for some reason used allen bolts on the cam sprocket (also cap nuts on studs). Can't shift the ones on the sprocket. Should I resort to heat? Any tips on locking motor other than spanner on crank?

The good news is bearings, cam and followers look pretty good  at first glance from my amateur eye.

God knows what cam chain tension issues there will be looking at adjuster.....

Having a nightmate loading images. Will try again when better internet....
« Last Edit: January 21, 2019, 10:58:35 PM by rozabikes »
One day I'll have the time to restore it, not just talk and dream....

Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
  • Grogu
  • *
  • Posts: 8205
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #6 on: January 21, 2019, 10:57:37 PM »
Ooooooh, this is just so exciting Tim. Heat them nuts 😀😀😀
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 Trigger

  • Grogu
  • *
  • Posts: 8434
  • Engines built on reputation, not advertising.
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #7 on: January 21, 2019, 11:15:35 PM »
Lock it via the fly wheel and heat the bolts as, most people used retainer  ;)

Are you on about domed nuts on the head studs ? should be.
« Last Edit: January 21, 2019, 11:21:10 PM by Trigger »

Offline Rozabikes Tim

  • SOHC Master
  • Posts: 1182
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #8 on: January 21, 2019, 11:40:59 PM »
More images I could not load. Will not accept multiples although file size reduced. One at a time then.. [ Guests cannot view attachments ]
One day I'll have the time to restore it, not just talk and dream....

Offline Rozabikes Tim

  • SOHC Master
  • Posts: 1182
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #9 on: January 21, 2019, 11:42:36 PM »
More [ Guests cannot view attachments ]
One day I'll have the time to restore it, not just talk and dream....

Offline Rozabikes Tim

  • SOHC Master
  • Posts: 1182
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #10 on: January 21, 2019, 11:43:44 PM »
More of cam [ Guests cannot view attachments ]
One day I'll have the time to restore it, not just talk and dream....

Offline Rozabikes Tim

  • SOHC Master
  • Posts: 1182
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #11 on: January 21, 2019, 11:45:04 PM »
And questionable adjuster..... [ Guests cannot view attachments ]
One day I'll have the time to restore it, not just talk and dream....

Offline Rozabikes Tim

  • SOHC Master
  • Posts: 1182
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #12 on: January 21, 2019, 11:52:05 PM »
Lock it via the fly wheel and heat the bolts as, most people used retainer  ;)

Are you on about domed nuts on the head studs ? should be.
Didn't recall them as domed and stripped a 400 before too. Age!

Enlighten me Trigger on retainer you refer to. As in clutch retainer?
One day I'll have the time to restore it, not just talk and dream....

Offline taysidedragon

  • SOHC Master
  • Posts: 1318
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #13 on: January 22, 2019, 12:04:20 AM »
I think Trigger is referring to Loctite or similar.
Gareth

1977 CB400F
1965 T100SS

Offline Trigger

  • Grogu
  • *
  • Posts: 8434
  • Engines built on reputation, not advertising.
    • View Profile
Re: 400/4 restoration - it begins at last
« Reply #14 on: January 22, 2019, 12:17:50 AM »
Lock it via the fly wheel and heat the bolts as, most people used retainer  ;)

Are you on about domed nuts on the head studs ? should be.
Didn't recall them as domed and stripped a 400 before too. Age!

Enlighten me Trigger on retainer you refer to. As in clutch retainer?

They have always been domed on the inside and non domed on the outside head studs. If they are open on the studs inside, then oil runs down the thread of the stud and leaks. I know this as it is my job  ;D ;D ;D

Nut lock, thread lock, stud lock, retainer  ;)

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal