The Suzuki GSX650F’s 16-valve, dohc four was all-new in the 2007 650 Bandit, is Euro3 clean, slick and responsive and, most pertinently, tuned for real-world versatility but with an exhilarating top end rush. Fuelling mods means it revs a little higher than the Bandit, although performance is unchanged. Peak power of 85bhp spread progressively over the rev range and decent enough grunt low down means this is a powerplant that’s sufficiently willing and able whatever the gear or your ham-fistedness, yet still rewards with three-figure thrills.