Zirri short 4th

how do you install a zirri short 4th for a smallframe?
the gears didnt come with instructions…

jonathan in New Zealand.

Hi, I am italian, I don’t have 4th gear Zirri on my ET3 motor, but I have another type.
If you have a problem to assemble your 4th gear Zirri, yuo can phone direct Zirri factory in Italy, here is the numbers:
Zirri Elaborazioni, Via Parmigianino n° 13, 43010 Ponte Taro Parma, Italy,
Telephone and fax :0039/0521/617229
Internet: http://sisdi.com/zirri

Alberto dm