numbers under tank

hillbilly · #1 PostAuthor: **hillbilly** » Sat May 30, 2009 10:50 am

do the z tanks have numbers underneith for a reason,i have found some stamped at the rear underneith near the strap lug. :?:

z2.john · #2 PostAuthor: **z2.john** » Sat May 30, 2009 11:05 am

Hi Hillbilly,
Some of the tanks have numbers stamped. It is a date code of manufacture. What numbers do you have?
John

hillbilly · #3 PostAuthor: **hillbilly** » Sat May 30, 2009 11:12 am

the number is.1021.any info would be a bonus :lol:

z2.john · #4 PostAuthor: **z2.john** » Sat May 30, 2009 11:19 am

That doesn't make sense to me. Normally it's month/year, for example my tank is 12 4 which is December 1974. What is approx date of your bike?
John

hillbilly · #5 PostAuthor: **hillbilly** » Sat May 30, 2009 12:07 pm

this very tank was in a wheelbarrow job i bought about 6 years ago,a full bike but no numbers or log book,just parts realy,but the number is 1021 that is under it,its an early tank as the seam is on the inside .and a none locking cap. :?:

Davy Doherty · #6 PostAuthor: **Davy Doherty** » Sat May 30, 2009 1:34 pm

Early tanks as you say are the one's which take the small badge, the seam under went right through to the end of the line Z1B!!

gbh · #7 PostAuthor: **gbh** » Sat May 30, 2009 3:00 pm

Davy Doherty wrote:Early tanks as you say are the one's which take the small badge, the seam under went right through to the end of the line Z1B!!

Davy is correct, the seams remained the same through to 1975 Z1B .The Z1 tanks had 122mm between tank emblem screws and the later Z1A and Z1B had 140mm...I think.

hillbilly · #8 PostAuthor: **hillbilly** » Sat May 30, 2009 4:46 pm

this is the number.

gbh · #9 PostAuthor: **gbh** » Sat May 30, 2009 7:16 pm

Not really sure BUT....your tank was probably the tank made between 1020 and 1022.
Just trying to be as useful as much of the info posted on this comm. thanks.

Davy Doherty · #10 PostAuthor: **Davy Doherty** » Sun May 31, 2009 5:54 pm

There you go simple as that.

Davy Doherty · #11 PostAuthor: **Davy Doherty** » Sun May 31, 2009 5:55 pm

There you go simple as that.

Garn 1 · #12 PostAuthor: **Garn 1** » Sun May 31, 2009 10:25 pm

That number could be 2024 on close inspection (Note: I think if it was ending with a 1, it would have a bar at the bottom of the downstroke).

On these tank stamping....... Some years ago, I did a bit of research on a batch of about ten Z1 series tanks, on a WorldWide forum that is now redundant [as regards to history].

I listed them all, in respect to known model Z1 series year, badge size and that tank stamped number, [including some A4 tanks]. I must say, I found no logical sequence, other than to say, they must have been a manufacturing batch sequence. Some had no marking at all, some had 3 digit numbers, some had alpha-numeric stamping! It was not a fruitful exercise, as a matter of fact, it was a failure! Readers of that forum also contributed, with no logical conclusion.

RegardZ.

numbers under tank

numbers under tank

Who is online