Tank fit question

[Texas Don]

As I delve further into my rusting tank, it's becoming obvious that even Caswell's stuff is going to be a short term repair. The rust is just too pervasive and I don't have much hope that I'm going to get even the majority of it out. I've been strongly advised against using an acid solution by my local body shop because the metal is already too thin in the lower seam area. So, I'm in the market for a tank to fit a '79 GS1000EN. I've found one on fleabay but it is for an '80 model. They look alike to my untrained eye, but does anyone know for sure if it will fit?
Don

[Rudeman]

As I delve further into my rusting tank, it's becoming obvious that even Caswell's stuff is going to be a short term repair. The rust is just too pervasive and I don't have much hope that I'm going to get even the majority of it out. I've been strongly advised against using an acid solution by my local body shop because the metal is already too thin in the lower seam area. So, I'm in the market for a tank to fit a '79 GS1000EN. I've found one on fleabay but it is for an '80 model. They look alike to my untrained eye, but does anyone know for sure if it will fit?
Don

The mounting points will be identical. The only difference might be the petcock relief and mounting holes. That can be solved by using the '80 model petcock.

[Texas Don]

Thanks for the prompt reply. On the fiche at partshark it does indeed show a different petcock. It only has one hose connection shown on the fiche. Does the '80 model not use a vacuum connection? I noticed too that there is a huge difference in the petcock cost between a 1979 and 1980 model. The '80 is over $100 less expensive.
Don

[Don-lo]

lol, just don't let pressure build up in it when cleaning it

[tkent02]

The '80 has no lever, no reserve. Useless, except it fits above the CV carb tops, the others don't. The distance between petcock mounting bolts MAY be different, too.

[Nessism]

lol, just don't let pressure build up in it when cleaning it

No kidding!

The '80 petcock does have a vacuum hookup. I bought a petcock from Z1 Enterprises and it appears to be identical to factory petcock, right down to the mfg logo cast into the body. Save some money and order from Z1.

[Rudeman]

Thanks for the prompt reply. On the fiche at partshark it does indeed show a different petcock. It only has one hose connection shown on the fiche. Does the '80 model not use a vacuum connection? I noticed too that there is a huge difference in the petcock cost between a 1979 and 1980 model. The '80 is over $100 less expensive.
Don

There are two hoses same as the '78-'79. I know...I know, no reserve but I never ran out of fuel. Just pay attention to the fuel gauge.