Yamaha GX400SP (1977)

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The 1977 Yamaha GX 400 is a motorcycle that features a four-stroke, parallel-twin engine with a capacity of 391cc. It has a compression ratio of 9.2:1 and a carburetor induction system. The maximum power output of the bike is 37 horsepower, achieved at 8800 rpm, while the maximum torque is 3.2 at 8000 rpm.

The motorcycle is equipped with a 6-speed transmission and a chain-driven final drive. It has front telescopic forks and dual shocks for the rear suspension. The braking system consists of a single disc for both the front and the rear. The front tire size is 3.00-18, while the rear tire size is 3.50-18. The dry weight of the bike is 168 kg.

Overall, the Yamaha GX400SP (1977) was a powerful and reliable offering from Yamaha. It provided a smooth and comfortable ride, especially with its suspension system. The 6-speed transmission allowed for ease in gear shifting, while the braking system was efficient and offered good stopping power. The GX400SP was a great bike for touring and commuting, and it remains a beloved classic today.

Technical specifications:

Make Model: Yamaha GX 400

Year: 1977


Engine: Four stroke, parallel twin
Capacity: 391
Bore x Stroke: 69 52.4 mm
Cooling System: Air cooled
Compression Ratio: 9.2:1
Induction: Carburetor
Starting: Kick
Max Power: 37 hp @ 8800 rpm
Max Torque: 3.2 @ 8000 rpm
Transmission: 6 Speed
Final Drive: Chain
Front Suspension: Telescopic forks
Rear Suspension: Dual shocks
Front Brakes: Single disc
Rear Brakes: Single disc

Front Tyre: 3.00-18
Rear Tyre: 3.50-18
Dry Weight: 168 kg
Fuel Capacity:

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