350 GTR

1970 Bridgestone 350 GTR Technical Analysis & Specification Breakdown

At the heart of the 1970 Bridgestone 350 GTR allround motorcycle, Bridgestone pairs a 345 cc (21.1 cu in) air-cooled twin, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 40 HP (29.2 kW) at 7,500 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 115.9 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the 350 GTR measures 160.6 kg (354 lbs) dry, translating to a power-to-weight ratio of 0.25 HP/kg (4.02 kg per horsepower). Rider ergonomics and chassis geometry center around a 825 mm (32.5 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,374 mm (54.1 in) wheelbase engineered for quick, flickable steering geometry. The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 153 km/h (95 mph).

Within MotoLibrary's Bridgestone archive, this model family spans 5 indexed model years from 1967 to 1971, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.