| Engine | Triumph Street Triple 660 S | Ducati Monster 659 |
|---|---|---|
| Displacement | 765 cc | 659 cc |
| Max power | 55 hp (@9 300 RPM) | 52 hp (@8 250 RPM) |
| Max torque | 39 lb ft (@5 200 RPM) | 33 lb ft (@7 500 RPM) |
| Redline | 12 650 RPM | 9 500 RPM |
| Idling speed | 1 200 RPM | 1 200 RPM |
| Management | Fuel Injection | Fuel Injection |
| Layout | DOHC Inline-3 | SOHC Desmodue V2 |
| Compression | 12.47:1 | 10.20:1 |
| Oil capacity | 3.29 quart | 2.93 quart |
| Oil type | 15W50, Motul 300V 15W50, Liqui Moly 15W50 | |
| Spark plug type | NGK CR9EIA9 | NGK DCPR8E |
| Cooling | Liquid | Air |
| Valves | 12 | 4 |
| Bore | 75.0 mm | 88.0 mm |
| Stroke | 48.48 mm | 54.2 mm |
| Throttle bore | 45.0 mm | |
| Weight to power | 7.62 lbs/hp | 7.89 lbs/hp |
| Power to weight | 328 hp/2500lbs | 317 hp/2500lbs |
| Battery type | YTX-9BS |
| Gearbox | Triumph Street Triple 660 S | Ducati Monster 659 |
|---|---|---|
| Type | Sequential | Sequential |
| Clutch | Wet | Wet |
| Drive | Chain | Chain |
| Chain type | RK XW-ring, 118 link | DID 520 V6, 108 links |
| Gears count | 6 | 6 |
| Primary ratio | 1.85 | 1.848 |
| Final drive | 2.88 | 3.0 |
| 1. gear | 2.62 (67 mph) | 2.461 (51 mph) |
| 2. gear | 1.95 (90 mph) | 1.666 (75 mph) |
| 3. gear | 1.57 (112 mph) | 1.333 (94 mph) |
| 4. gear | 1.35 (130 mph) | 1.13 (111 mph) |
| 5. gear | 1.24 (141 mph) | 1.0 (125 mph) |
| 6. gear | 1.14 (153 mph) | 0.923 (135 mph) |
| Chasis | Triumph Street Triple 660 S | Ducati Monster 659 |
|---|---|---|
| Frame type | Twin-spar aluminum | Steel trellis |
| Front susp. | Showa 41mm USD SFF, 4.33 in travel | Showa 43mm USD, 4.72 in travel |
| Rear susp. | Showa monoshock, 4.88 in travel | Sachs monoshock, 5.83 in travel |