Key performance
Technical specifications
Engine
- Displacement
- 119 cc
- Power
- 10.0 ch @ 9000 tr/min (7.3 kW)
- Engine type
- Single cylinder, two-stroke
- Cooling
- Air
- Compression ratio
- 12.0:1
- Bore × stroke
- 54.2 x 51.5 mm (2.1 x 2.0 inches)
- Valve timing
- Port control
Chassis
- Gearbox
- 6-speed
- Final drive
- Chain (final drive)
Brakes
- Front brakes
- Single disc
- Rear brakes
- Single disc
- Front tyre
- 2.50-18
- Rear tyre
- 2.75-18
Dimensions
- Fuel capacity
- 10.50 L
- Weight
- 94.00 kg
Overview
Spain in the 1980s, undergoing a major overhaul of its motorcycle industry, produced some stubborn curiosities. The Bultaco Streaker 125 is one of them, a concentrate of anachronisms that could only have been born there and at that time. Here, touring is practiced without compromise, on the tip of a gritty two-stroke, with only a ten and a half-liter tank as baggage. A philosophy more than a specification.

Its 119 cc two-stroke single-cylinder engine breathes at a compression ratio of 12:1 and delivers a little over ten horsepower at 9000 rpm. The figures lack brilliance, but they hide the essential: a square architecture, with a bore of 54.2 mm slightly greater than the stroke of 51.5 mm, typical of an engine designed for responsiveness rather than revs. Coupled with a six-speed gearbox, this small block demands to be worked, sounding the call of secondary roads where its 116 km/h top speed finds meaning. Air cooling and carburetor fuel delivery complete a mechanical picture of radical simplicity.
With an announced weight of 94 kilograms fully fueled, the Streaker defies the laws of physics of touring. This figure, closer to a trial bike than a road bike, explains everything. Handling must be instantaneous, almost nervous, and the 18-inch tires, a dimension from another age, ensure a frank contact with the road surface. Braking, provided by a single disc on each wheel, was probably sufficient for a machine that prioritized lightness over pure power.
It was aimed at the minimalist globetrotter, the one for whom the journey begins with stripping down. A rider seeking the essence of movement, ready to accept the vibrations of a two-stroke, the meticulous maintenance of a chain drive, and frequent stops for refueling. Faced with the Japanese four-strokes that were beginning to dominate the segment, Bultaco offered a raw sensory experience, a direct dialogue with mechanics. One didn’t buy a Streaker for its comfort, but for its character.
Today, it exists mainly in the imagination of collectors of defunct brands, like a last breath of pre-decline Bultaco. It recalls an era when touring could be a light, frugal, and demanding adventure, far from fairings and integrated luggage. A motorcycle for purists, with a dry sense of humor and an undeniably retro charm.
Reviews & comments
No reviews yet. Be the first to share your opinion!