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Author Topic: CB400 tank on a CB550?  (Read 2108 times)

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DanZ

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CB400 tank on a CB550?
« on: July 20, 2008, 11:58:46 PM »
hello.  does anyone know if a cb400 tank will fit directly on a cb550, both from '76.  or will it take major modification?
thanks
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Offline .RJ

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Re: CB400 tank on a CB550?
« Reply #1 on: July 21, 2008, 05:27:52 AM »
A 400 tank will fit on a 750 IF you clearance the bottom for the carbs - it will probably work on a 550 with similar modifications.

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DanZ

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Re: CB400 tank on a CB550?
« Reply #2 on: July 21, 2008, 07:00:43 PM »
does that involve welding or just cutting?
thanks
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Offline dustyc

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Re: CB400 tank on a CB550?
« Reply #3 on: July 21, 2008, 07:16:59 PM »
If you didn't weld it, you'd have problems keeping fuel in it.  ;D ;D ;D
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1977 CB750

Offline dustyc

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Re: CB400 tank on a CB550?
« Reply #4 on: July 21, 2008, 07:44:16 PM »
Speaking of fuel, you want to remove all traces of fuel before cutting or welding or you could have a really bad day.
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1977 CB750

Offline lone*X

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Re: CB400 tank on a CB550?
« Reply #5 on: July 21, 2008, 07:49:44 PM »
Interesting modification to make it fit.  Although it looks like you now have trapped fuel in the back of the tank that cannot reach the petcock.  How much does this cut down tank capacity?
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Lone*X  ( Don )

75 CB550K1  
VTX1800C for two up cruisin.
Several others have come and gone but whose keeping track.
52 years on two wheels and counting.....
"The best safety feature of any motorcycle is the one God put between your ears.  It's also the least utilized"

Offline .RJ

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Re: CB400 tank on a CB550?
« Reply #6 on: July 22, 2008, 06:12:28 AM »
Quote from: lone*X on July 21, 2008, 07:49:44 PM
How much does this cut down tank capacity?

No idea... stock 400 tank is ~3.5 gallons.  My guess is not enough to worry about :)
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Offline canttuckmyshirt

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Re: CB400 tank on a CB550?
« Reply #7 on: July 22, 2008, 07:50:04 AM »
Is the front wide enough? I tried sliding a 76 400 tank on my 72 500 and the tank looked too narrow in the front to fit over the frame. I was rushing though...
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72 CB500, Abe Henry wheels
77 CB550, resto-mod

04 S2000, LS1 V8
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