Here's what i got from Duke John

Hi Lord Liendecker,

This is old stuff for me, but I believe that those 2 numbers are used for scaling the weapon in length. Look at original pike weapons and compare it to spears and you will see the difference. If I remember well 5, 1 means 5 times as long and 3, 2 means 3/2=1.5 times as long.

Good luck!

apparently these will only effect the size of the weapon. so to make a weapon to the correct scale try this. Use an already made weapon as a template for the size you want, and then to fill in these two digits, coppy the numbers from the template weapon.
last two digits of the row that corresponds with the weapon number as shown in [unittype_w.txt] of weapons.txt in the template graphics folder, and paste them in the weapons.txt of your new graphic's folder, after the 4 coordinates.

If that makes any sense.
Ill try it and see how it works.

This is what i ended up with

43,234,93,254,1,3
43,226,196,229,3,1
45,215,120,223,2,1
39,203,125,212,2,2
128,204,219,224,1,3

the first was the axe that was in the Gahzi infantry bif, that i started with.
2) the Gothic Sergeant's pike. I coppied these numbers from the /PlateS/weapons.txt (weapon 2, coresponding to the Gothic Sergeants)
and so on