Engine and Performance
The Street 750 is powered by an all new 749 cc V twin liquid cooled “Revolution X” engine. This 60 degree V twin gets a 4 valve head and boasts of 85mm X 66mm, bore X stroke. Reportedly, this mill can rev up to 11000 rpm. As per the specs, it produces 60Nm @ 4000 rpm, however the power figures are rumoured to be between 50-55 bhp (H-D never reveal bhp figures). Never mind the bhp figures, V engines are loved for their grunty torque and that’s what the Street 750 has in oodles. Like all Harley-Davidson bikes, power transmission to the rear wheel is via a toothed belt, which liberates one from the hassles of lubrication and adjustment of a chain drive.
The 750`s V twin is mated to a 6 speed gearbox which clunks through the cogs with reassuring feel. The clutch is surprising light, however could have had a more progressive feel. Riding it along the traffic isn’t much of a wrist workout since the torque-y nature of the mill demands minimal swapping in between cogs. Such is the nature of its potent bottom end torque that the bike pulls away clean from 35 kmph in 6th gear!
Despite being a liquid cooled power plant the head radiation does become a bother while trundling along the urban traffic. The liquid cooling also minimizes the V twin roar and leaves it with whirring burble. The `Screaming Eagle` exhaust and air filter will certainly help the Street 750 gain some more aural grunt.
The engine exhibits an eagerness to rev and does not hesitate at the slightest twist of the wrist. The V twin remains the happiest within the low to mid range of the rev band and does get slightly harsh towards the top end. Keep the throttle wide open and the 750 will hit 170 kmph, however the wind blast makes riding at speeds above 140 kmph quite tiresome.
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