Fitting CB500T Gas Tank to 78 CB750...

[welovedon]

Can it be done with no mods?

[Piute]

Myself ,I never done before but after checking on it http://cgi.ebay.com/ebaymotors/NOS-HONDA-GAS-TANK-CB450-CL450-CB500-CB550-CB750-AHRMA-/380131945540?pt=Motorcycles_Parts_Accessories&hash=item5881a12c44, these are the rubbers that hold it on in the front ,according to this sale ad on "E" fits :CB450-CL450-CB500-CB550-CB750,so that will fit in,your 78 is it a K or a F cause the F has one big az mail-box (i have the 77) and K would be smaller but haven't got to no how much.
  I'm sure some-one has done it and of course can be done ,BUT mod  my concern would be the pet-cock,looking at this pic

 very good choice seems I've seen them in pics on bikes,Lets hope can be excepts

[welovedon]

I have the F model.  hmmmm, what kind of mod do you think I will have to do??

[Piute]

  I take it you don't have a tank
OR do you have the 500 ?already
    Lets say the pet-cock gets in the way(hits something) ; then you would elbow out(away from bike)
  and have to use an in linefilter and valve shut off ,you'll find and here others say you can't use a inline filter ,say it blocks flow,believe what you wont .But never never run with out a filter,I'll have 2 on mine (stock in pet cock ) witch you never change or clean till it's to late and it's raining and my (fine-er)glass in line you see and are consions of it each day.
    Ever wonder am I getting gas you can see it

[welovedon]

I do not have the tank, but was fishing around thinking of using it on my 750F.  So the only big issue would be the petcock, is that right?

[Piute]

  I'm not for sure ,never did it to my 750,you can run with a Camel back on full of gas,and the bike will run,most situations fuel valve is the prob.
 leave the post up and after it's to late some-one will see it and tell you
   I was on one sight were they didn't show there bikes cause afraid some-one was going to use there idea,Biking is a brother-hood to those that have respect and we help for the love of sport,not greed or self
  lets have fun and get this bike started

[welovedon]

Well, thanks for the info!

[welovedon]

Also quick question, to remove the gas tank off of my 750, just undo the gasline and then pull up?  

[Piute]

1st1st shut off gas and pull off hose at tank.
  lift your seat you can see under your tank theres a rubber pad work that loose ,mine has 2 lil taps on frame is all ,then push it forward so rubber is completely loose /off ,then pull tank back it will then be loose .

[welovedon]

thank you!

[welovedon]

How about an 81 750k gas tank?  Will that fit my 78 750F frame??

[TOOLS1]

It should. Might not line up perfect with the seat though.
TOOLS

[welovedon]

how do you fix rust on the inside of a gas tank, btw?

[ichinotani]

Just wondering if you ever attempted to fit a cb500t tank to your 750. I'm doing one right now and have discovered that it's a fairly daunting project. It can be done but just barely.

[18Bravo]

It depends on the model. I posted photo of my attempt to put a CB500T tank on a '79 CB750K. The problem on the '79 was the two backbones. The CB500T only has one, so it entailed beating the crap out of the inside of it. (Annoying my jackass neighbor - added bonus!)
The front mounts line up perfectly on the CB750 pivots. Things were going well when someone drove by and offered almost three times what I had in the bike, and wanted the original tank, so  I never got to finish it.

Just found the old thread:

http://honda-cb750-s.456789.n3.nabble.com/Am-I-crazy-or-just-stupid-td4055089.html#a4055097