Vespa PX125 T5, PX 125 T5 Elestart (1985-99) vs Suzuki Boulevard C109RT (2010-12) vs KTM RC 250 (2014-15) vs Yamaha XVS 950 V-Star Bolt R Spec (2018-19) vs Yamaha TT 600 (1991-92)
Comparison technical specifications
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| Make: | Vespa | Suzuki | KTM | Yamaha | Yamaha |
| Model: | PX125 T5, PX 125 T5 Elestart | Boulevard C109RT | RC 250 | XVS 950 V-Star Bolt R Spec | TT 600 |
| Years: | 1985-99 | 2010-12 | 2014-15 | 2018-19 | 1991-92 |
| Engine: | Two stroke, Single cylinder, | Four stroke, 54° V-Twin | Four stroke, single cylinder. DOHC with finger followers, 4 Valve per cylinder | Four stroke, 60°V-cylinder, SOHC, 4 valve per cylinder | Four stroke, single cylinder, SOHC, 4 Valve |
| Capacity: | 123.4 cc 7.5 cub in | 1786 cc / 108.8 cu. in | 248.8 cc / 15.2 cu-in | 942 cc / 58-cu-in | 595 cc / 36.5 cu-in |
| Bore x Stroke: | 52 x 55 mm | 112 x 90.5mm | 72 x 61.1 mm | 85 x 83mm | 95 x 84 mm |
| Compression Ratio: | 11.3:1 | 10.5:1 | 14.5:1 | 9.0:1 | 8.5:1 |
| Starting: | Kick start | Electric | Electric | Electric | Kick |
| Max Torque: | 13.1 kW / 1.34 kgf-m / 9.7 ft/lb @ 6250 rpm | 160 Nm / 16.3 kgf-m / 118 lb.ft @ 3200 rpm | 24 Nm / 17.7 lb-ft @ 7250 rpm | 8.2 kgf-m / 59.3 ft-lb @ 3000rpm | 50 Nm / 4.7 kgf-m @ 5500 rpm |
| Transmission: | 4 Speed, grip-shift, constant mesh | 5 Speed | 6 Speed | 5 Speed | 5 Speed |
| Final Drive: | Direct drive | Shaft | Chain 5/8 x 1/4” X‑Ring | Belt | Chain |
| Front Suspension: | Helical spring and double acting hydraulic dampers | Telescopic, coil spring, oil damped, 49 mm | WP Suspension Up Side Down | 41mm forks, 5.3in wheel travel | 43mm Telescopic forks |
| Rear Suspension: | Helical spring and double acting hydraulic dampers | Link type, coil spring, oil damped, adjustable spring preload | WP Monoshock | Preload adjustable dual shocks | Alloy swinging arm single shock with adjustable dampers. |
| Front Brakes: | Cable operated, 125 mm expanding type drum brake | 2 x 310 mm discs, 3 piston calipers | Single 300 mm disc | Single 298mm disc 2 piston caliper | Single 310mm disc |
| Rear Brakes: | Cable operated, 125 mm expanding type drum brake | Single 274mm disc, 2 piston caliper | Single 230 mm disc | Single 298mm disc | Single 270mm disc |
| Front Tyre: | 3.5 x 10" | 150/80R16 | 95/75-R17 | 100/90 -19 | 90/90-21 |
| Rear Tyre: | 3.5 x 10" | 240/55R16 | 115/75-R17 | 150/80-16 | 130/90-18 |
| Fuel Capacity: | 8 L / 2.1 US gal | 19 L / 5.0 US gal | 10 Liters / 2.6 gal | 12 Litres / 3.1 US gal | 10 Litres / 2.6 US gal |