Triumph’s Trident 660 motor isn’t the same as the triple powering the current, shorter-stoke 660cc Street Triple S. It’s actually a heavily reworked Daytona 675 lump with its stroke reduced from 52.3mm to 51.1mm, trimming capacity to 660cc. Power and revs are also dialled down from a track-tastic 123bhp @ 13,500rpm to a more road-friendly 80bhp @ 10,250rpm.
The engine has 67 new components, including crank, pistons, gudgeon pins, cylinder liners, cylinder head, cams, crankcase castings, sump, cooling system, radiator, alternator rotor and stator, air intakes, exhaust and slip and assist clutch for a light lever action.
Most usefully for a bike designed for everyday riding it has more grunt at lower revs than the Street Triple S with over 90% of its torque delivered from 3600rpm to 9750rpm. Its…
