The original model had the 790 cc (48 cu in) air-cooled DOHC twin engine and had an extended 1,660 mm (65.2 in) wheelbase with the crankshaft at 270°.

[3] The first generation 2003–2004 790 cc (48 cu in) model had 53.1 hp (39.6 kW) at the rear wheel, with a top speed of 166 km/h (103 mph).

[2] In 2007, a multipoint sequential fuel injection model was launched, with new design alloy wheels, a restyled chain cover, pillion footrest hanger and upper fork shrouds, as well as slash cut silencers and four new paint schemes.

Featuring the all new 2017 Bonneville's 1200cc High Torque liquid-cooled engine, the 2018 Speedmaster re-purposed the Triumph Bobber Black's faux-hardtail chassis into a light-duty tourer by adding a larger fuel tank (3.17 gal.

Just like the Bobber Black, the 2018 Speedmaster has a ride-by-wire throttle allowing for selectable 'Rain' and 'Road' modes that modulate throttle response, and one-touch cruise-control; ABS and traction control; LED lighting with daytime running light; twin front disc brakes with Brembo calipers; upgraded KYB front forks; and larger tires.