Hi there, just a few ideas which probably aren't the problem: are the float heights correct? Cam timing incorrect ? Shims clearance too tight? Tank causing a vacuum, does it run better with the cap open ( I don't know how the Z1 tank breaths :?: ) However with it sooting the plugs up it does sound r...

Hi there, many moons ago a mate of mine attempted this on his Z1000J, The problem he encountered was the spacing between carbs 2&3 because of the center cam chain on the Z unlike the chain on the end on the GPZ9. A couple of mins with the hacksaw seperated carbs 1&2 from 3&4 and a tweak ...