Performance

We took the 1597cc parallel twin from the Thunderbird and boosted its capacity to 1699cc with 3.3mm bigger pistons in huge, 107.1mm bores. So the Thunderbird Storm does have a classic-looking engine that packs a mighty punch, but that power is delivered smoothly thanks to twin balance shafts.

The result of the Thunderbird Storm’s bigger engine is more power at 98PS. And an even higher peak torque at 115lb.ft right down at 2,950rpm with more torque across the rev range. So it delivers instant thrust when you twist the throttle, even at very low rpm.

Configuration

Despite the air-cooled appearance, the Thunderbird Storm engine is liquid-cooled. We placed its radiator unobtrusively between the frame downtubes and the fat, twin exhaust headers.

And there’s plenty more 21st century technology tucked away too, like our highly accurate sequential fuel injection system with its progressive throttle linkage so you get power predictably and smoothly.

We added double overhead camshafts and a crankshaft with 270 degree firing intervals, to give you an engine with authentic cruiser character.  Whilst the fuelling is looked after by a sequential fuel injection system and progressive throttle linkage so your engine delivers its torque exactly the way you expect.

Blacked Out

The Thunderbird Storm has a  big black engine with upright cylinders and machined cooling fin edges to help define its imposing shape.

Many other parts of the Thunderbird Storm are black. Including the rear springs and headlight bowls.

Belt Drive

The final drive is an inverted tooth belt with carbon fibre strands to give it a higher tensile strength than steel. While the pulleys have a patented ultra-hard coating that minimises wear so that the whole belt drive system needs very little attention. It’s really quiet and clean too.

6 Speed Gear Box

The transmission uses a six-speed gearbox with a tall top ratio for relaxed highway cruising and exceptional fuel efficiency.

Fuel efficiency

We gave the Thunderbird Storm double overhead camshafts and four valves per cylinder, along with a very tall top ratio in the six-speed transmission for a great ride and to help the fuel economy. Even at 75mph you get almost 50mpg, as good as some commuter bikes.