Then something else interesting happened. I had made it a habit, upon being given access to the season’s new racebikes, to remove the top end, take it home, and walk up and down, drinking coffee and staring at all the parts—cylinder, piston, head—in turn. I seem to be slow to notice things, and so need this extra “staring time.” And I like coffee. In 1978, Yamaha had done something very different in aiming the new TZ250’s “B” transfers. Engineers had begun to swing the rear vertical walls of those transfers more toward the exhaust port. They started with a small change and then increased it a year later. I decided to see if this would work on the TZ750, whose transfer design had for years changed not at all from that of the 1969 TR2 350cc twin.