Yamaha’s 155mph FZR 1000 was a Superbikefrom the start. By 1989 it had a top speed of 167mph, which prompted ‘Cycle World’ to crown it Bike of the Decade. The unique feature which gave this model the EXUP name was a servo motor driven exhaust valve which improved gas flow. Included are road & comparison tests plus full performance data. Models reported on: Genesis, EXUP, OWO1, FXUP, RU, AC and the Vance and Hines specials. Used Book in Good Condition