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Messages - Oz350Four

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1
CB350/400 / Re: Can anyone identify these items please?
« on: September 21, 2021, 05:50:10 AM »
Ted, Oddjob may be onto something... check the plate which holds the instrument cluster to the headlight bracket and see if there are holes where the 2 posts should be..??  Just a thought.... [ Guests cannot view attachments ]
(Acknowledging screen shot taken from CMSNL website)

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Misc / Open / Re: tank de-rust
« on: August 03, 2021, 01:33:01 AM »
I've used 2 stroke fuel mix as I didn't have diesel at the time and it worked a treat...

3
CB350/400 / Re: Vent pipe guide clips positon ?
« on: July 25, 2021, 01:51:51 AM »
A nice touch with the two small pieces of rubber cut and stuck to the centerstand...!!!

4
New Member Introductions / Re: CB400/4
« on: June 27, 2021, 05:18:03 AM »
G'Day Neil... welcome from the other side of the globe...!!

5
Project Board / Re: 1977 400F2 first restore project
« on: May 23, 2021, 08:55:00 AM »
smoothoperator & Bryan,

What I found when I took my cam chain tensioner bar out the PO applied that much force they actually bent the bar at the flattened section... and they (POs) wonder "how on earth did I strip that thread..???" sheesh...

6
CB350/400 / Valve guides and vapour blast cleaning...
« on: May 22, 2021, 01:38:49 PM »
I'm about ready to send my cases and sundry covers away for vapour blast cleaning and I'm wondering if I need to remove the valve guides or not..???
I'm of the belief that vapour blasting is not abrasive (like sand, bead or soda blasting) and therefore wouldn't damage them..??
More than happy too be schooled on this one...


7
Bryanj,

Thanks for the insight... It is a pleasure learning from those that have gone through the struggle before us...
Each step I take to completing this project has a huge learning curve to it and I'm appreciative of that...

8
Bryanj thanks for the info...  so I can get the crankshaft journals mic'd to the level required in the workshop manual.
Unfortunately I'm not in a position to spring for an uber accurate tool that I might only use once (maybe twice) short of taking the buttoned up cases to a machine shop I'm kinda stymied.
I have the letters on the end of the case (BBABB) and the numbers / letters from the crank along with the journal measurements that I have taken.
Is there any way of determining the shells required..???

9
Thanks folks... Will look at getting longer Helicoils...
Bryanj I'm not sure what you meant about the micrometer bit, happy to be informed...!!!??
Dont I need the two measurements (case ID and crankshaft journal OD)..??

Trevor

10
CB350/400 / Helicoil and crankcase thread repair... opinions..!!
« on: May 06, 2021, 02:33:25 AM »
GDay forum folk,

Cracking on with rebuilding a CB400F engine and have managed to purchase the requisite tools (micrometer and appropriate torque wrench) so that I can obtain the measurements to determine the correct bearing shells needed.
As you may have seen on a previous thread one of the crankcase bolts was swapped out with a head stud and topped off with a domed nut.
The previous owner probably did this because they had stripped the thread and the head stud was able to reach the last remaining threads...

So, if I am correct in what Ive read on this and other small 4 forums I need to torque down the cases so I can get a close measurement of the bearing ID and cross reference that with the crankshaft journal measurements to work out which bearing shell is required, however that is hard to do when one of the bolts is not quite right.

The question I have, is one of technical expertise regarding the use of helicoils in this situation. Even double stacking helicoils if need be.
Is this considered an appropriate fix to take or is it not worth it because of the bolts location and operating stress..???

Once agian thank for the feedback.

Regards...

Trevor

11
CB350/400 / Re: Crank Journal Bearing condition...
« on: April 18, 2021, 09:24:32 AM »
Yep, obviously lost / broke one the bolts so used a spare stud - it didn't have much torque on it whereas the others all felt like he'd used a four foot pipe on the wrench doing them up.... quite the bush mechanic..!!

12
CB350/400 / Re: Crank Journal Bearing condition...
« on: April 18, 2021, 08:54:08 AM »
Thanks K2-K6,
I had known about the old long bolt in the mount issue... but did you notice the oddity in the crank case bolts...???
I have started reading Nurse Julie's build thread... quite detailed I must say. I wish I had half the tools / facilities / knowledge at my disposal..!!  :D :)

13
CB350/400 / Re: Crank Journal Bearing condition...
« on: April 18, 2021, 12:01:52 AM »
Thanks folks for the feedback / advice...
Now to work out what colour / number I need and try and source them.
Stay tuned, I will no doubt have further questions.
And, just to keep a few of you busy I've posted a picture of handiwork by the previous owner so you might get an idea what I'm up against.
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CB350/400 / Crank Journal Bearing condition...
« on: April 17, 2021, 09:04:53 AM »
I bought a basket case 75 CB400 four and am in the process of stripping it down for a rebuild.
I'm not one for doing things half arsed like the previous owner did but I don't want to have to spend any more money than necessary.
Anyway, I'm down to the point where Ive split the cases and would like folks opinion as to the crank journal bearings.
Can these bearing halves be reused or should I replace them.
So as to not drown the would be reader in pictures I've posted the lower ones so as to get feedback.
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