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Old May 26th, 2017, 08:50 PM   #2
Z1R rider
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Name: Roger
Location: Mitchell, South Dakota
Join Date: Apr 2014

Motorcycle(s): 1978 Z1R, 1999 EX250

Posts: A lot.
MOTY - 2018, MOTM - Oct '16
Sounds to me like the idle circuits still need cleaning (jets and passages in the carbs) and or adjusting. Did you have the idle adjusting needles out? If so, is it possible you lost the O-rings or washers in there? Or the O-rings may be bad. Or, is the engine actually changing speed or just the tach going crazy?

and welcome to the board!
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