ET fuel tap positions.

[imago]

ET 'export' large tanks have two fuel tap sizes and positions. 45mm between bolt centres with the tap in the middle, and 50mm centres with the tap at the rear.

Anyone remember what the year/model change was?

[saffa]

no idea but I have both of those. finding the 45mm tap was a dead end. wound up using one from an EZ but it sits close to the carb top

[Duckndive]

2 hours ago, imago said:

ET 'export' large tanks have two fuel tap sizes and positions. 45mm between bolt centres with the tap in the middle, and 50mm centres with the tap at the rear.

Anyone remember what the year/model change was?

I thought the export tank was the smaller one  

[saffa]

i suppose in Japan they were all exports

[TonyGee]

2 hours ago, imago said:

Anyone remember what the year/model change was?

not 100% sure but going by the bikes/tanks ive had the early large tanks had the 50mm tap at the rear and the later tanks the 44mm in the middle. but don't quote me on that  

[Duckndive]

5 minutes ago, saffa said:

i suppose in Japan they were all exports

https://www.bike-parts-suz.com/suzuki-motorcycle/1100-MOTO/GSX/1980/GSX1100T-T-X-/BODY-FRAME/FUEL-TANK-GSX1100T-ET-24L-/5/2377353/C/1282

[Duckndive]

1980 

https://www.bike-parts-suz.com/suzuki-motorcycle/1100-MOTO/GSX/1980/GSX1100T-T-X-/ENGINE-TRANSMISSION/FUEL-COCK-GSX1100T-ET-/6/2377393/M/1282

1981

https://www.bike-parts-suz.com/suzuki-motorcycle/1100-MOTO/GSX/1981/GSX1100X-T-X-/ENGINE-TRANSMISSION/FUEL-COCK-GSX1100T-ET-/6/2377393/M/1283

Same tap apparently on 24Lt tank 

[imago]

Someone suggested on FaceAche that the 750 was at the back and 1100 in the middle.

22 minutes ago, Duckndive said:

I thought the export tank was the smaller one  

Just how Suzuki described them, no idea why but it's on the parts listings at CMS and Robinsons. Export was the big tank and rest of world plus domestic was the small tank. It always seemed odd that the UK got the big tank given how small it is and the USA got the small tank. 

[TonyGee]

1 minute ago, imago said:

Someone suggested on FaceAche that the 750 was at the back and 1100 in the middle.

Just how Suzuki described them, no idea why but it's on the parts listings at CMS and Robinsons. Export was the big tank and rest of world plus domestic was the small tank. It always seemed odd that the UK got the big tank given how small it is and the USA got the small tank. 

we in the UK got the better tank 

[Duckndive]

4 minutes ago, imago said:

Someone suggested on FaceAche that the 750 was at the back and 1100 in the middle.

yes 750 & 1100 tanks are different as are the clock's and loom 

[imago]

8 minutes ago, Duckndive said:

yes 750 & 1100 tanks are different as are the clock's and loom 

I couldn't remember what the different fitment was for the tanks but it does make sense. Threw me a bit as it came off of an 1100, but there will have been a fair bit of mix and match going on over the last 40 odd years.

[TonyGee]

14 minutes ago, Duckndive said:

Someone suggested on FaceAche that the 750 was at the back and 1100 in the middle.

that would make sense but looking at a lot of pic's of both 750 and 1100 theirs no definite answer !!!!  but who's to say the tanks haven't been changed ?  

[imago]

4 minutes ago, TonyGee said:

that would make sense but looking at a lot of pic's of both 750 and 1100 theirs no definite answer !!!!  but who's to say the tanks haven't been changed ?  

I think that's it, trying to compare how they left the factory and how they are 40 + years later is a bit of a fool's errand. I know the bike the tank came off of is an 1100 and not a 7/11 as the VIN's correct as is everything else. 

So I'll have a rummage and see if the tap's in one of the boxes, failing that I'll see if I can get a tap, failing both of those I'll just use another tank but that'll mean paint which I wasn't planning on.

[Duckndive]

9 minutes ago, imago said:

I think that's it, trying to compare how they left the factory and how they are 40 + years later is a bit of a fool's errand. I know the bike the tank came off of is an 1100 and not a 7/11 as the VIN's correct as is everything else. 

So I'll have a rummage and see if the tap's in one of the boxes, failing that I'll see if I can get a tap, failing both of those I'll just use another tank but that'll mean paint which I wasn't planning on.

Whats the hole centres on the tap you want ? 

[Toecutter]

Just now, Toecutter said:

Could just fit a pingle style tap and make and adaptor plate? Think pingle do both 44 and 50mm spacing or make one?

 

 

[imago]

35 minutes ago, Duckndive said:

Whats the hole centres on the tap you want ? 

The 750 44 mm one I think and it has a smaller width filter tower, I can't recall the hole size though. I'll need to check tomorrow as there's a serious danger of mixing up which I need unless I'm looking at it. 

I should have the tap that came off the tank, but it was stripped years ago so I don't know where it would have been put or if it was binned.

Edited November 12 by imago

[imago]

31 minutes ago, Toecutter said:

Could just fit a pingle style tap and make and adaptor plate? Think single do both 44 and 50mm spacing or make one?

 

I could, but given the price of Pingel stuff now that'd be a last resort. 

This is for the shelf clearance bike so I want to use as much as possible from stock and only buy what I have to on stuff like a new C&S set.

[imago]

As is ever the case with Suzuki things don't appear to be as straight forward as a 750/1100 split. I CBA posting them all tonight but there are launch/press release and brochure photos showing 1100s with the tap at the rear and also in the middle. So it appears that Suzuki made a change at some point, fuel surge issues, clearance, standardising tap sizes across the range, or simply 'because reasons'.

[TonyGee]

47 minutes ago, imago said:

As is ever the case with Suzuki things don't appear to be as straight forward as a 750/1100 split. I CBA posting them all tonight but there are launch/press release and brochure photos showing 1100s with the tap at the rear and also in the middle. So it appears that Suzuki made a change at some point, fuel surge issues, clearance, standardising tap sizes across the range, or simply 'because reasons'.

it does come across as pretty random 

[imago]

10 minutes ago, TonyGee said:

it does come across as pretty random 

DK have got two 750s for sale on that auction site, a 1980 with the tap in the middle, and an '82 with the smaller tap at the rear.  The more pics I look at online the more convinced I am that it was a model year change between ET and EX to move it to the rear for both the 750 and the 1100.

Not that it makes a blind bit of difference to anything 40 years on, but it'd be nice to know for sure.

[TonyGee]

33 minutes ago, imago said:

DK have got two 750s for sale on that auction site, a 1980 with the tap in the middle, and an '82 with the smaller tap at the rear.  The more pics I look at online the more convinced I am that it was a model year change between ET and EX to move it to the rear for both the 750 and the 1100.

Not that it makes a blind bit of difference to anything 40 years on, but it'd be nice to know for sure.

yeah their must be method in their madness !!!!  

I know on one of my tanks I blanked the crappy 50mm tap off  and used a 44mm tap just in front of the carbs. 

[imago]

14 hours ago, Duckndive said:

Whats the hole centres on the tap you want ? 

So just to confirm having measured it, I need the 50 mm vac tap. That's confirmed as the later EX type, which I believe was carried over to the EZ.

Edited November 13 by imago

[Dezza]

17 hours ago, imago said:

Someone suggested on FaceAche that the 750 was at the back and 1100 in the middle.

Just how Suzuki described them, no idea why but it's on the parts listings at CMS and Robinsons. Export was the big tank and rest of world plus domestic was the small tank. It always seemed odd that the UK got the big tank given how small it is and the USA got the small tank. 

The YTS that designed the tank ensured they held the same amount in gallons, it's just the US gallons are smaller than proper gallons. Probably

[imago]

53 minutes ago, Dezza said:

The YTS that designed the tank ensured they held the same amount in gallons, it's just the US gallons are smaller than proper gallons. Probably

Maybe it was a deliberately passive aggressive move by someone still pissed off at the Americans for warming up Hiroshima and Nagasaki? Sitting at his desk chuckling malevolently at the thought of people running out of petrol half way to Vegas.

Edited November 13 by imago

[imago]

And we have a winner. 

The offending article was deep in the 'stuff' bucket.