Sunbeam Model 90 (1928-33) vs Buell / EBR Buell XR9R Firebolt (2003) vs Sunbeam Model 9 (1924-27) vs KTM 300 EXC-E Enduro (2009-10) vs KTM 690 Duke (2011)
Comparison technical specifications
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| Make: | Sunbeam | Buell / EBR | Sunbeam | KTM | KTM |
| Model: | Model 90 | Buell XR9R Firebolt | Model 9 | 300 EXC-E Enduro | 690 Duke |
| Years: | 1928-33 | 2003 | 1924-27 | 2009-10 | 2011 |
| Engine: | Single cylinder, four stroke, SOHV | 45° V-Twin, four stroke, pushrod actuated overhead valve. hydraulic self-adjusting lifters, 2 valve per cylinder. | Single cylinder, OHV | Two stroke, single cylinder | Four stroke, single cylinder, SOHC, 4 valves |
| Capacity: | 493 cc / 30.1 cu in | 984 cc / 60 cu in | 493 cc / 30.1 cu in | 297 cc / 18.1 cu in | 653.7 cc / 39.91 cu in |
| Bore x Stroke: | 80 x 98 mm | 88.9 x 79.4 mm | 80 x 98 mm mm | 72 x 72 mm | 102 x 80 mm |
| Compression Ratio: | 7.0:1 (Optional 7.5 or 9.0:1) | 10.0:1 | 6.5:1 | 12.8:1 | 11.8:1 |
| Cooling System: | Air cooled | Air cooled | Air cooled | Liquid cooled | Liquid Cooled |
| Starting: | Kick | Electric | Push | Electric | Electric |
| Final Drive: | Chain | Kevlar belt | Chain | Chain, Regina O-ring | Chain X-Ring 5/8 x 5/16" |
| Frame: | Single cradle, steel | Hollow aluminium twin-spar frame doubles as the fuel tank | Single front down tube | Central double cradle, CrMo4 | Chromoly trellis frame, powder-coated, aluminium sub frame |
| Front Suspension: | Druid-pattern, girder forks | Showa upside-down forks, adjustable for preload, compression & rebound damping | Druid forks | WP 48 mm upside down fork and shock | WP Upside-down forks, 4860 ROMA |
| Rear Suspension: | Rigid, spring loaded saddle | Showa shock absorber, adjustable for preload, compression & rebound damping | Rigid, spring loaded saddle | Fully adjustable WP-PDS mono-shock | WP monoshock, 4618 with Pro-lever deflector |
| Front Brakes: | Drum | ZTL-type brake, 6-piston fixed caliper, Ø375 mm single sided, inside out, stainless steel, floating rotor | Drum, internal expanding | Single260 mm disc, 2 piston caliper | Single 320 mm floating disc, radially screwed four-piston brake caliper |
| Rear Brakes: | Drum | Single Ø230 mm disc, 1 piston caliper | Drum, internal expanding | Single 220 mm disc, 1 piston caliper | Single 240 mm floating disc, single piston caliper |
| Fuel Capacity: | 11.4 L / 2.5 Imp gal / 3.0 US gal | 14 L / 3.7 US gal | 11.4 L / 2.5 Imp gal / 3.0 US gal | 8.5 L / 2.2 US gal / 1.9 Imp gal | 13.5 Litres / 3.6 US gal / 3.0 Imp gal |