Thread: Top Speed
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Old July 16th, 2017, 03:56 PM   #12
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
Ours (6 in the family) all seem to be a touch rich on the mains and a bit lean on the needle with stock air boxes and exhaust, one has stock air box and full Muzzy and is the same. We're at 1300', so maybe that has something to do with it. I've played with valve clearance to adjust the top end power, in the middle of the lash specs mine have more midrange but have a hard time pulling past 12 or 12.5k, but when snugged down to the tight end of specs will pull happily to the rev limiter.
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