The earlier Z1s had a different advance curve than do the KZ900s and later KZ1000s. Why? Who knows. I think this has come up when discussing the Dyna S ignition as they have two different rotors to accomodate the use of either mechanical advance.
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
1976 kz900 in parts but will be going some day soon
1980 kz1000G1
1976 kz900 parts bike
1979 kz1000 shaftie parts bike
1978 kz1000 33mm smoothies 1075 kit
Troutdale Oregon USA
the first advancers on the Z1's went from 5 degrees advance to 40 degrees advance. This caused (together with the early carb) the bike to have a very rough idle. In mid production 1974 Kawasaki switched the advancer to a 20/40 unit to give a smooth idle. Complementing this change were changes to the carbs to help smooth the idle and transition off idle.
The 20/40 advancer is an easier one to live with...
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www.z1enterprises.com
