Apart from FI, this engine is identical to the regular Gixxer SF's. It is the 155cc, air-cooled, single-cylinder unit. Even with the fuel-injection system, the power and torque figures of 14.8hp at 8,000rpm and 14Nm at 6,000rpm respectively are unchanged. What has changed, however, is the throttle response, which feels much crisper, especially at low rpms. In fact, the motor’s tractability seems to have increased a bit, and the bike can easily pull from speeds as low as 35kph in top gear, without any judder. The engine does retain its slightly gruff-sounding nature though, but overall vibrations have been reduced significantly, and even when you rev the motor all the way up to its redline of 10,000rpm, all you get is a very mild buzz through the footpegs.
In terms of outright acceleration figures, there’s no real difference as the bike can make the run from 0 to 60kph in 5.54sec, with the 100kph mark coming up in 17.51sec. While we didn’t test out what actual top speed the bike could achieve, the maximum we saw was an indicated 120kph. However, this Gixxer SF Fi is the most comfortable cruising at about 90kph, with its aerodynamic front fairing making short work of any wind blast.
The Gixxer SF's engine is mated to a five-speed gearbox, each gear slotting with a precise feel in a one-down, four-up pattern. Its clutch is well-weighted and operates with a light feel that helps keep the bike easy to ride in crowded city traffic. One area where the FI has been vastly improved is roll-on acceleration. In third gear, 40 to 60kph takes just 3.69sec, while the same run in fourth gear takes just 5.54sec.