Honda CRF 450X (2009-10) vs Honda CM 450 (1982) vs Honda CD 175 (1972-75)
Comparison technical specifications
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| Make: | Honda | Honda | Honda |
| Model: | CRF 450X | CM 450 | CD 175 |
| Years: | 2009-10 | 1982 | 1972-75 |
| Engine: | Four stroke, single cylinder, DOHC, 4 valves | Four stroke, parallel twin, OHC,3 valve per cylinder | Four stroke, twin cylinder, SOHC, 2 valve per cylinder |
| Capacity: | 449 cc / 27.4 cu-in | 447 cc / 27.2 cu-in | 174 cc / 10.6 cu-in |
| Bore x Stroke: | 96 x 62mm | 75 x 50.6 mm | |
| Cooling System: | Liquid cooled | Air cooled | Air cooled |
| Compression Ratio: | 12.0:1 | 9.3:1 | |
| Induction: | Keihin 40mm flat-slide | 2x 30mm Keihin CV | Carburetor |
| Ignition: | CD with electronic advance and lighting coil | CDI | CDI |
| Starting: | Electric & kick | Electric | Electric & kick |
| Max Power: | 44.8 hp / 33 kW @ 7500 rpm | 37 hp / 27.5 kW @ 9000 rpm | 17 hp / 12.4 kW@ 9000 rpm |
| Max Torque: | 43 Nm / 4.38 kg-m @ 7000 rpm | ||
| Transmission: | 5 Speed | 6 Speed | 4 Speed |
| Final Drive: | #520 chain; 14T/40T | Chain | Chain |
| Front Suspension: | Inverted fully adjustable 47mm Showa cartridge forks, 16-way rebound settings, 16-way compression | Telehydraulic forks | Oil dampened telescopic, 115mm wheel travel. |
| Rear Suspension: | Pro Link Showa single shock with 312mm of travel 17-way rebound settings, 13 low speed compression settings and 3.5 turns of high speed compression adjustment) | Swingarm fork with adjustable telehydraulic shocks. | Twin shock, oil dampened, 64mm wheel travel. |
| Front Brakes: | Single 240mm disc 2 piston caliper | Single disc | 140mm Drum |
| Rear Brakes: | Single 240mm disc | Drum | 130mm Drum |
| Front Tyre: | 80/100-21 | 3.50-18 | 2.75 -17 |
| Rear Tyre: | 110/100-18 | 4.00-16 | 3.00 -17 |
| Dry Weight: | 113 kg / 249 lbs | 181 kg / 399 lbs | 122 kg / 269 lbs |
| Fuel Capacity: | 7.2 Litres / 1.9 gal | 13 Litres / 3.4 US gal | 10.5 Litres / 2.8 US gal |