Topic: CB750 Gas Tank

[Sgt Wonderful]

I recently got a Gas Tank off eBay. The seller said it was off a 1974 CB750. My bike is a 71 CB750.  To make a long storry short, the tank dosen't fit. The space between the front where it's supposed to fit on the rubber knobs is to wide. Is there a difference between the 71-76 tanks?

[jaknight]

Hi Sarge,

Yes, the tanks are different.  With the passing years, Honda increased fuel capacity slightly almost every year.  I can't give you exact differences........ but I am sure others will join in and can give you that info.

Just rough guess here to give you an idea, I seem to remember the very first tanks on '69s were 3.9 or 4 gallons.  My '74 750 K4 has a 4.45 gallon tank.

What do you plan on doing with the tank now?  What kind of shape is it in?  I am asking because I have toyed with the idea of getting a second gas tank?? 

Edit Add On Just curious........ Are you into firearms?  I am very much......... One of my more passionate interests....... thing is I have too many of them......... interests, not firearms.

~ ~ ~ jaknight ~ ~ ~

[Inkscars]

I just recently acquired a tank off of a 70, but the badge plates have been shaved. Looks like it needs a petcock. If you were just looking for a tank that can easily be made to look nice, maybe we could swap?
Send me a pm if you're interested. If you spent money on a show quality, I cannot help you . 

[Sgt Wonderful]

jaknight, Yeah I'm into fire arms too. Especially WW ll Area. M-1's 45's etc. M-16's too.

[GodFather13]

Really? I was under the impression the 69-70 model 750 had a 5 gal tank. On a recent fill up I put over 3 gals in it and never used the reserve. I would assume the reserve is at least a gallon, no?

[Gordon]

Really? I was under the impression the 69-70 model 750 had a 5 gal tank. On a recent fill up I put over 3 gals in it and never used the reserve. I would assume the reserve is at least a gallon, no?

4.7 gallons according to the model guide on the sohc4 website.  1.3 gal reserve.

[MCRider]

I recently got a Gas Tank off eBay. The seller said it was off a 1974 CB750. My bike is a 71 CB750.  To make a long storry short, the tank dosen't fit. The space between the front where it's supposed to fit on the rubber knobs is to wide. Is there a difference between the 71-76 tanks?

I covered this phenom in my build thread. My K2 frame had a right side petcock. I wanted a left side petcock, thinking the tanks were otherwise identical. Wrong, the left side petcock tanks are wider in the front and mine is 3/8" longer overall.

First off, the rubber bumpers are different part numbers, the later ones stick out further to catch the wider tank I think.  I found rubber bumpers at the junkyard which are otherwise identical to to my originals, but stand away from the frame further.

I had to cut the backside of the front horshoe brackets to allow the tank to slide forward more so my seat would close. Welded some extenders onto the horshoes.

[jaknight]

Hi Guys,

Looks like I had things reversed from the reality.  Honda decreased fuel capacity slightly with the passing years.  My apologies; ........ my memory is decreasing slightly with passing years.

Sorry I threw you a bad low ball Sarge...

~ ~ ~ jaknight ~ ~ ~

[754]

If the tank is wider at mounts, then shim the ribbers.

in the last while, I have put 77K, 75 400F, 71 500, CB 450 tanks on a 750 frame, and I believe they all fit the front..

Maybe something else wrong?

Am thinking of something I saw once.. guy had a dent in the tank, tried to puush dent out with air, put TOO MUCH in.. tank widened..

getting a funny feeling about your tank...