Author Topic: New (to me!) '77 CB400F - US model  (Read 38161 times)

Offline Nurse Julie

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Re: New (to me!) '77 CB400F - US model
« Reply #105 on: November 07, 2018, 06:26:40 PM »
A smear of Red Rubber Grease helps.
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Offline K2-K6

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Re: New (to me!) '77 CB400F - US model
« Reply #106 on: November 07, 2018, 07:05:45 PM »
It's all right,  Julie is a real nurse and you can classify this as medical intervention  ;D

As with all medical records they don't have to be disclosed to third party  ;) nobody will know  :) :) :)

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #107 on: November 07, 2018, 08:00:09 PM »
A smear of Red Rubber Grease helps.

Not sure how I'll work it in during removal, but I'll see what happens!

It's all right,  Julie is a real nurse and you can classify this as medical intervention  ;D

As with all medical records they don't have to be disclosed to third party  ;) nobody will know  :) :) :)

My wife always seems to know when I've been giving massages to motorbikes.  Maybe I should start washing my hands?

Offline Nurse Julie

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Re: New (to me!) '77 CB400F - US model
« Reply #108 on: November 07, 2018, 08:55:27 PM »
A smear of Red Rubber Grease helps.

Not sure how I'll work it in during removal, but I'll see what happens!

It's all right,  Julie is a real nurse and you can classify this as medical intervention  ;D

As with all medical records they don't have to be disclosed to third party  ;) nobody will know  :) :) :)

My wife always seems to know when I've been giving massages to motorbikes.  Maybe I should start washing my hands?
Sorry, I misunderstood, you won't get grease in to help removal. But it helps when refitting. If you have a tin if silicone spray with a thin tube out of the nozzle, you may be able to get some of that in to help removal.You could also use a very large flat blade screwdriver, or similar, to get behind the lip of the duct guide and prize it backwards.
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 mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #109 on: November 07, 2018, 08:57:09 PM »
Thanks Julie - silicone spray may help with the removal... and with keeping my hands clean, too!

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #110 on: November 07, 2018, 11:02:10 PM »
Result!  Once I found the lip in the rubber seal that holds the flared rim of the air duct guide, I was off to the races.  The guide came out pretty easily, then I had to remove the rubber seal, then the other rubber seal, in order to get the air chamber out, followed by the carbs.

With the carbs off the bike, I was able to carefully loosen all four float bowl drain screws.  Dry, of course, and the threads were a little powdery.  I removed one of the float bowls (all four screws were just barely tightened, almost finger-tight - surprising) and... well, I've seen worse.  But a cleanup is in order.  Pics (click to zoom in):

inside the bowl - loose powdery stuff in the bottom:

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The floats, etc:

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The main jet (?) and the spring holder (which has no name or part number in my parts list):

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Yummy stuff which fell out of the float bowl when I tipped it over:

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I'll put the bike to bed now, with oiled rags stuffed in the intakes and silencer, and some oil in the cylinders.  I have the carbs and the front brake bits to work on this winter...

Offline Nurse Julie

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Re: New (to me!) '77 CB400F - US model
« Reply #111 on: November 07, 2018, 11:08:20 PM »
Jet retainer clip 😀😀😀 We'll done Matt, you git there in the end. It's easy once you know how these things come apart.
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 mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #112 on: November 07, 2018, 11:18:59 PM »
Easy once you're told how these things come apart!  Thanks Julie!

ps: it's getting late, go to bed!

Offline Nurse Julie

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Re: New (to me!) '77 CB400F - US model
« Reply #113 on: November 07, 2018, 11:27:46 PM »
 💤 💤 💤
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 mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #114 on: November 08, 2018, 01:06:06 PM »
I just discovered that there's supposed to be a retaining spring holding the air filter in place - missing on this bike, the filter is just sitting in the box.  I wonder if it's been ridden that way for any length of time?

That, and the 3-1/2 inches of drive chain slack...

Offline Bryanj

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Re: New (to me!) '77 CB400F - US model
« Reply #115 on: November 08, 2018, 01:13:30 PM »
Sounds about right

Offline SteveD CB500K0

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Re: New (to me!) '77 CB400F - US model
« Reply #116 on: November 08, 2018, 01:18:38 PM »
Rich (RGB750) made a batch of these.

He may have some left...

2022 Tiger Sport 660
1971 CB500K0

Offline mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #117 on: November 08, 2018, 01:38:57 PM »
Dave Silver lists them - shipping costs double the price, though, becomes a $20 piece of bent wire...  I might even try making my own...

Offline Nurse Julie

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Re: New (to me!) '77 CB400F - US model
« Reply #118 on: November 08, 2018, 01:41:24 PM »
Rich (RGB750) made a batch of these.

He may have some left...
Different type to what Rich made on the CB400/4's Steve.....but, if he has made some for the 400, I need one.
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 mattsz

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Re: New (to me!) '77 CB400F - US model
« Reply #119 on: November 08, 2018, 01:44:07 PM »
Rich (RGB750) made a batch of these.

He may have some left...
Different type to what Rich made on the CB400/4's Steve.....but, if he has made some for the 400, I need one.

Julie - are you running without one?  Have you "shimmed" the filter tight, or come up with some other method of sealing it?

 

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