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does anybody know the stock bore for a 900?im digging through my pile of blocks and pistons looking for a stock bore 900 i found a set of nice pistons and a block with no ridge its about 66-67mm with this cheesey tapemeasure im using ,does that sound right?im going to build this motor for the how fast can a stock 900 motor run challenge so i want it to be legit:whistle: ill put a turbo or a bottle on it later to make up for the lack of displacement after i strip down to a set of speedos cover myself in vaseline and launch it down i-29 for the record!

A 900 is really a 902.89369cc... bore and stroke are 66mm each

that sounds close enough to what i have,time to start scrubbing ! thanks.i think im gonna dyno this thing too when i get it done to see what i get with a header on a properly blueprinted motor compared to what kawasaki says. any bets on what rear wheel horsepower will be?its gonna take me a little while to get all of this going so start guessing.stock 903 bore unported z1 head with valvejob stock compression 28mm carbs with k&ns vance and hines 4n1 ,dyna s ignition;)