Katana 1100 szx


GSX250S Rider
I have just purchased a gsx1100 szx katana, here's the thing every were I have read they say that the engines are the same on the szx and on the gsx1100sz, except for the flywheel. Ok here is the thing my szx has 1075 cast into my barrels all other barrels I have seen all read 1074 on the sz, So can anyone help with this anomalies.
Recently came across some info regarding the 1075 / 1074,
according to a mechanic at the Aust. 1981 castrol 6 hr at Amaroo , all the Kats there were 1075, he also says the bore was the same as the 1074 barrells.
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