New tank for a '72 CB350

danfr

danfr

Been Around the Block
Does anyone know what options i have for a tank for a '72 CB350 with relatively low modifications..?
 
A lot of small displacement Hondas may work. Theres really a million tanks that you can make work. Break out the tape measure and go to town.
 
maybe a better question is: what tanks have other people found they were able to put on a cb350 without too much modification?

i'd like to know too.
 
I just purchased a cb350-4 tank which is going on my cb350K4 ( 1972 twin cyclinder), this has the side indents so you do not have to make your own knee dents, plus I do not need to make any modifications to the frame as it's going to fit in the standard mounts.

Another option is to use a cb450 tank, make sure not to use the 1980's style, stick to 72' thru 76ish' . If modifications are needed it's usually on the seat side not the front rubber mount area. plus you'll have more fuel storage.

pic of the tank I'm going to use :

008-3.jpg


you can see my ( slow ) progress of my build " the Bloody Wrench "
http://dotheton.com/index.php?topic=13063.msg124260#msg124260
 
I have heard that the petcock on a CB350F tank will foul up the engine? Makes sense how the petcock would be feeding 4 carbs on the F tank, but only 2 on the 'k' tank.....

anybody have similar findings?
 
TOTALLY different petcock on the F model to the K model tanks. The F model only has one hose coming out of it. I guess it could lean out the carb if there was a shortage of fuel to the bowl, but I'm guessing that is not a real problem. I think all you would need to do would be to add a "Y" into the fuel line to supply the two carbs. I can take some F model petcock pics if you need them.
 
just an idea but this tank was off a 78 ish cb400 hondamatic, small, kinda squarish, single outlet petcock which did cause trouble on my 500. but its different and i thought it looked cool. has a good size tunnel.... cant see why it wouldnt work on a 350....
50ea22d1.jpg

569ad1d8.jpg
 
How would the 4 cyl petcock effect the carburetion of the bike?
I may have a larger opening to flow more gallons per hour but it is still gravity fed, so the pressure would be the exact same.
Now if you used a fuel line that has the same ID as the twin cyl tank, then at the same pressure, it would flow the same gph, right?
Think of a funnel. If you had two funnels, one with a larger opening in the bottom but both having the same hose attached to them then the hose would be the restriction. Unless the opening in the smaller funnel was smaller then the hose ID, they should flow the same.
 
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