The Triumph T120R Bonneville motorcycle specifications include a 650 cc (39.66 cu in) engine.
Key specifications
1967Year released
650 ccDisplacement
How the Triumph T120R Bonneville compares
This compares the motorcycle with all Triumph models in this specifications database. The blue marker is this model and the grey line is the Triumph database average.
Displacement650 cc
Low 199 ccAverage 949 ccHigh 2,294 cc
About 31% lower than the Triumph database average. Around the 18th percentile across Triumph models.
This model Triumph database average
Triumph database percentile rankings
Percentiles show where this motorcycle sits across the Triumph specifications database. They are descriptive database rankings, not performance ratings.
Displacement18th
650 cc — larger displacement than about 18% of Triumph models.
Mechanical overview
Engine layout snapshot
Twin, four-stroke • 650 cc • Air cooled
Chassis snapshot
Chain (final drive)
Model information
| Year released |
1967 |
| Category |
Custom / cruiser |
Engine specifications
| Engine type |
Twin, four-stroke |
| Displacement |
650 cc (39.66 cu in) |
| Valves per cylinder |
2 |
| Cooling system |
Air |
| Fuel system |
Carburettor |
| Fuel control |
Overhead Valves (OHV) |
| Ignition |
Lucas |
| Starter |
Kick |
Transmission and drivetrain
| Final drive |
Chain (final drive) |
| Clutch |
Wet multiplate |
Chassis and suspension
| Frame |
Single downtube, steel. Original with the exception of the bolt on hard tail |
| Front suspension |
Fork |
| Rear suspension |
Not for quite some time |
Brakes, wheels and tires
| Front brakes |
Expanding brake (drum brake) |
| Rear brakes |
Expanding brake (drum brake) |
| Wheels |
Spokes |
Performance
| Top speed |
252.7 km/h (157.0 mph) |
Electrical and instruments
| Electrical |
12vdc with battery eliminator. Lucas ignition. |
| Instruments |
No |
| Lights |
Head and tail lights. |
Other specifications
| Seat |
No room for a passenger |
| Exhaust system |
Double stainless steel pipes with loudeners instead of mufflers. |
| Comments |
Aftermarket oil tank, hard tail, rear fender. Nothing more than the basics, no gauges or excess. Engine is built to the hilt. |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Triumph models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Triumph information before relying on them. Visit the official Triumph website.