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The 200 is only used on one or two versions of the 1400 , correct ? Don't the others use a 180 rear ? Dusty
Eldo and (surprisingly) MGX-21 use 180s; Custom, Touring and Audace use 200s.
There were some guys on the now defunct Cali 1400 forum who did the change and reported favourable results. One was a guy from Taranaki, New Zealand I remember.Personally, I lik e the way my Cali 1400's handle with the stock rear, although I have fitted a Michelin Pilot Road 4 GT 120/70/ZR18 on the front for improved response when cornering.