Cycling Passion - Dura-Ace History [1973-2023]
Complete Dura Ace reference.
Complete Dura Ace reference.
Dura Ace 7400 history.
List of Shimano mountain bike groupsets from 1984 - 2000.
Forum thread discussing Kooka history.
Some stories of broken cranksets.
Lots of pictures of Kooka cranksets.