Author Topic: CB400F Carb overhaul  (Read 14715 times)

Offline Lobo

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CB400F Carb overhaul
« on: February 13, 2013, 08:35:34 AM »
Gents,

About to tear down the carbs & overhaul. Before I start I note a couple of small plastic 'tie rods' tying the 1/2 & 3/4 lifters together. They're both cracked / broken.

What is their job? - the bike seemed to run fine, and any tips for re fabricating them - will light aluminium sheet do or will that be too stiff?

Ta muchly,....
« Last Edit: February 13, 2013, 08:39:01 AM by Lobo »

Offline sweetpeauk

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Re: CB400F Carb overhaul
« Reply #1 on: February 13, 2013, 09:42:48 AM »
They should be thin stainless, will check thickness later. Mr cooper should be able to help you source a pair.
CB400F
CB400F2
RVF400
XT500D
CB900F2C
GS1000GT
XS1100E

Offline Lobo

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Re: CB400F Carb overhaul
« Reply #2 on: February 13, 2013, 02:11:33 PM »
Thanks SweetPeaUk,

But... what is their purpose?  And secondly, I'd have to say the (broken) pair I have look original - are they aftermarket perhaps? 

And finally, if thin stainless, or plastic as mine were, do they need to be flexible?

Cheers,
Lobo

Offline sweetpeauk

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Re: CB400F Carb overhaul
« Reply #3 on: February 13, 2013, 02:31:56 PM »
I think they are for keeping the lifting mechanisms parallel to each other, the theaded end and locknut above adjust the synchronisation so they hold the lifter's so they can't float. They don't help in the lifting of the slides. 
« Last Edit: February 13, 2013, 03:02:27 PM by sweetpeauk »
CB400F
CB400F2
RVF400
XT500D
CB900F2C
GS1000GT
XS1100E

Offline sweetpeauk

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Re: CB400F Carb overhaul
« Reply #4 on: February 13, 2013, 02:51:17 PM »
Thickness is 0.32mm, so going to be fiddly to make. I have three sets of carbs and they all use the same material.
Paul


CB400F
CB400F2
RVF400
XT500D
CB900F2C
GS1000GT
XS1100E

Offline steven400/4

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Re: CB400F Carb overhaul
« Reply #5 on: February 13, 2013, 05:16:18 PM »
dont think steve has any left i want,nt 6 off him he only had 2 but you can get new ones from germany ebay
cb400f2 x7
honda ss 50
gsx 1400

Offline Lobo

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Re: CB400F Carb overhaul
« Reply #6 on: February 14, 2013, 12:04:50 AM »
Thanks guys. Will try ebay... and in the meantime try fabricating a pair from feeler gauges or suchlike - will have to look around 'my office' for suitable scrap.

Offline Lynx

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Re: CB400F Carb overhaul
« Reply #7 on: February 14, 2013, 02:17:12 PM »
I need a coupld of these too. I had one previously home made one which looked like o bit of bucycle tyre  ::). I'm happy to search German eBay but what are they called?

Cheers
Lynx
Yamaha RD500LC
Triumph Speed Triple RS.

Previous bikes include
1976 Honda CB400F Now sold :-(
CB350K3 x2
CB250G5
CX500C
VF500F2
VF1000FE

Offline Lobo

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Re: CB400F Carb overhaul
« Reply #8 on: February 14, 2013, 11:33:55 PM »
....yup, I trawled German ebay & had no luck. As for what they may be called in German ...aye carrumba & good luck to ya! I've learned new names for bike parts that I'd have thought illegal if you shouted them on the streets....

Seriously, if you come across a (spare) pair pls let me know...will do the same.

Offline Lynx

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Re: CB400F Carb overhaul
« Reply #9 on: February 15, 2013, 09:34:07 AM »
Will do. In the mean time, it might be a bit of bean can :-X. Must be better than tyre!
Yamaha RD500LC
Triumph Speed Triple RS.

Previous bikes include
1976 Honda CB400F Now sold :-(
CB350K3 x2
CB250G5
CX500C
VF500F2
VF1000FE

Offline Lobo

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Re: CB400F Carb overhaul
« Reply #10 on: February 15, 2013, 10:06:59 AM »
 ... alrighty, recon I've bought myself 20 or so attempts to get it right...!

Offline steven400/4

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Re: CB400F Carb overhaul
« Reply #11 on: February 15, 2013, 04:07:03 PM »
if there not on ebay now keep looking he puts them on every couple of weeks
cb400f2 x7
honda ss 50
gsx 1400

Offline steven400/4

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cb400f2 x7
honda ss 50
gsx 1400

Offline mickwinf

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Re: CB400F Carb overhaul
« Reply #13 on: February 17, 2013, 11:36:06 AM »
Anybody know if these are the same as a 500/4 as i need two for mine.
Love the 500 and 550 have a 500 called Lazarus under restoration

Offline steven400/4

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Re: CB400F Carb overhaul
« Reply #14 on: February 17, 2013, 12:40:02 PM »
they should all be the same
cb400f2 x7
honda ss 50
gsx 1400

 

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