Author Topic: New (to me!) '77 CB400F - US model  (Read 9617 times)

Offline Oddjob

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Re: New (to me!) '77 CB400F - US model
« Reply #285 on: October 09, 2019, 06:18:48 PM »
The thing with the twisted wire makes me wonder if the bike has ever been stolen?

The reason I ask is that it was common knowledge in the trade at that time that it was possible to start the bike without a key and without breaking anything, the answer lies in what has been done to the fusebox, it was found that jumping those 2 fuses together and switching the headlight on meant that power flowed down the main fuse and up the headlight fuse, this meant switching the lights on lit up the entire loom, everything worked but nothing got broke unless they sheared off the steering lock at the same time.

Have you tried that? Or it could have been the main and head fuses, I forget exactly now.
« Last Edit: October 09, 2019, 06:20:55 PM by Oddjob »
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Re: New (to me!) '77 CB400F - US model
« Reply #286 on: October 09, 2019, 10:08:55 PM »
...yea, I’ve read this ‘tip’ before Oddjob, noting that jumper wire was not in fact needed; you simply took two fuses out and rammed one back into in the ‘dead space’ between the holders. (and like you I can’t remember which two - but it wouldn’t be hard to work out)

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #287 on: October 09, 2019, 10:57:14 PM »
Sorry for my shameless cross post - I posted a question of sorts in the tricks and tips section, which has had 80+ views to date but no replies.  Anyone care to take a look and comment?

http://www.sohc.co.uk/index.php/topic,20253.msg179895.html#msg179895
A soda blaster has many uses, including the parts you are talking about. No media is left, so no issues with little bits if glass or sand being left but, it is a slow process blasting anything with soda. The outcome and time spent is entirely dependant in the output of the compressor you are using. It needs to be a high CFM rating to do an effective job.

Thanks Julie!  Where does the baking soda go?  Or, do you have to wash the parts and the soda dissolves?  I guess the junk you're blasting off has gotta be clean off somehow...

The specs on that tool are, ahh... interesting.  The website lists the "average air consumption as 7 cubic feet/min @ 90psi... which is also the maximum pressure...

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #288 on: October 09, 2019, 11:02:49 PM »
The thing with the twisted wire makes me wonder if the bike has ever been stolen?

Ooooh, the plot thickens!  While this is certainly an intriguing possibility, I doubt it's the case.  The bikes previous ownership history is pretty well known, and the same type of wire that was jumping the fuses was also holding the broken ignition switch together (physically, not electrically).  I really like the "bypassing the broken headlight switch" theory - but that said, anything is possible!!!

Offline Nurse Julie

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Re: New (to me!) '77 CB400F - US model
« Reply #289 on: October 09, 2019, 11:16:57 PM »
Sorry for my shameless cross post - I posted a question of sorts in the tricks and tips section, which has had 80+ views to date but no replies.  Anyone care to take a look and comment?

http://www.sohc.co.uk/index.php/topic,20253.msg179895.html#msg179895
A soda blaster has many uses, including the parts you are talking about. No media is left, so no issues with little bits if glass or sand being left but, it is a slow process blasting anything with soda. The outcome and time spent is entirely dependant in the output of the compressor you are using. It needs to be a high CFM rating to do an effective job.

Thanks Julie!  Where does the baking soda go?  Or, do you have to wash the parts and the soda dissolves?  I guess the junk you're blasting off has gotta be clean off somehow...

The specs on that tool are, ahh... interesting.  The website lists the "average air consumption as 7 cubic feet/min @ 90psi... which is also the maximum pressure...
The baking soda is water soluble so a rinse in water will sort that. The spec on that tool is nowhere near man enough for the job, you would need 14 CFM at an absolute minimum and that one is only 7 CFM. The CFM is more important than the PSI for blasting any media.
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http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #290 on: October 10, 2019, 01:57:33 AM »
The spec on that tool is nowhere near man enough for the job



I'll save my money...

Offline Oddjob

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Re: New (to me!) '77 CB400F - US model
« Reply #291 on: October 11, 2019, 02:28:46 AM »
...yea, I’ve read this ‘tip’ before Oddjob, noting that jumper wire was not in fact needed; you simply took two fuses out and rammed one back into in the ‘dead space’ between the holders. (and like you I can’t remember which two - but it wouldn’t be hard to work out)

Yeah, the thieves back in the day used the spare top fuse and rammed it between 2 of the fuse holders, nice of Mr Honda to leave a spare fuse so handy  :D :D
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Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #292 on: October 25, 2019, 04:44:44 PM »
As I mentioned in another thread, I finally removed my broken silencer - despite copious application of heat and penetrating oil over a long period, I just couldn't budge it without making it even worse - if it's possible!  I couldn't grip the body, since it was already separated from the connecting end, and any, ahhhh... forceable persuasion... just served to bend and deform the collar where it joins the collector.  I literally had to peel the collar away to get it free.  Pics... the original break is obvious:

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An additional hole in the bottom at the rear, which I didn't even know was there:

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The collector end, with the graphite-like "gasket" which suffered a bit in the removal as well:

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Anyway, based on all that, I decided not to try and repair it.  The usual aftermarket silencer supplied by DSS is out of stock - not like I'm in any hurry for it anyway.  Matt at their USA location said that they'd have a new supply of these after the new year.  But then he got back to me and said they had a discounted one in stock with a couple of dents, which would be visible when mounted.  I don't think I'll regret the tradeoff, since I'm not doing a fancy restoration, and just want to get it running, so I bought it, along with a couple of other items on my list.   The savings just about paid for the extra bits and the shipping...

Offline Bradders

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Re: New (to me!) '77 CB400F - US model
« Reply #293 on: October 25, 2019, 05:52:25 PM »
That’s the same place that mine has corroded Mattsz although I don’t think mine is quite so bad as yours. In fact the chrome comes up quite nice with a polish. Also I think my baffles are breaking up as the silencer rattles as you move it.

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #294 on: February 02, 2020, 09:46:02 PM »
The 400 is being stored in a heated shop for the winter!  8)

But it's 1/2 an hour from me...  :(

I went up there today, to poke at a few things - forgot to bring the key with me, so electrical tests were a hassle!  Reinstalled my now-unbent rear turn signal bracket; tested the light but it wouldn't work.  Turns out the bulb was fried - nice and cloudy.

Could it be the original?  How long has it been since Stanley made bulbs?

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Inside the same turn signal housing, the plastic's "chrome" lining is peeling off in sheets - I wonder if the bulb's hazy failure is related?

Offline Bryanj

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Re: New (to me!) '77 CB400F - US model
« Reply #295 on: February 02, 2020, 09:57:25 PM »
Stanley are still in production and that milky colour is caused by air leaking into the envelope

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #296 on: February 02, 2020, 10:56:16 PM »
The guy I bought my Sylvania replacement bulbs from said Stanley hasn't made bulbs for years... maybe he just hasn't sold them...

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #297 on: March 25, 2020, 11:08:09 PM »
The 400 is being stored in a heated shop for the winter!  8)

But it's 1/2 an hour from me...  :(

Went to fetch the wee Honda today!  It wasn't very happy to leave its winter home, I'm sure! (see attached) I'm looking forward to cleaning it up and reassembling it and try to get it running!

Oddly, after sitting for over a year with hardly a drop of oil on the floor, I found it today with a couple of puddles beneath it.  Not much, about a half-teaspoon between the two - but I wonder why it's decided to weep just over the last six weeks?

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Offline taysidedragon

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Re: New (to me!) '77 CB400F - US model
« Reply #298 on: March 25, 2020, 11:40:35 PM »
It did an excited wee because it was going home. 😂
Gareth

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1977 CB400F

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #299 on: March 26, 2020, 12:56:28 AM »
It did an excited wee because it was going home. 😂



It was better off where it was - now it's relegated to a corner of an unheated garage.  But at least it will get some attention...

 

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