Yamaha YX600 Radian
The YX600 Radian is a sport/touring motorcycle manufactured by the Yamaha Motor Company between the years of 1986–1990. Except for the suspension, the rest of the Radian was a parts-bin motorcycle and came equipped with a slightly detuned for mid and low-end torque version of air-cooled, inline-4 which came from the Yamaha XJ600 that was also along with the Radian used in the Yamaha FZ-600 Sport Motorcycle, as well as smaller carburetors and frame from the 550 Maxim. Cycle World obtained for the Radian a 1/4 mi. time of 12.76 @ and acceleration at 4.0 seconds.
Specifications
| Overall length | 2,075 mm |
| Overall width | 770 mm |
| Overall height | 1,095 mm |
| Model | 1UJ, 1UL |
| Displacement | 598 cc |
| Bore x Stroke | 58.5 x 55.7 mm |
| Compression ratio | 10.0 : 1 |
| Starting system | electric starter |
| Lubrication system | Wet sump |
| Engine oil capacity | 2.9 L |
| Fuel tank capacity | 12 L |
| Fuel reserve amount | 2.5 L |
| Carburetor type/manufacturer | BS30 x 4/MIKUNI |
| Clutch type | Wet, multi-disc |
| Transmission - Primary reduction system | Chain, Gear |
| Transmission - Secondary reduction system | Chain drive |
| Transmission type | Constant mesh 6-speed |
| Frame type | Double cradle |
| Caster angle | 27° |
| Trail | 128 mm |
| Tire size | 110/90-16-59H |
| Tire size | 130/90-16 67H |
| Brake type | Dual, disk brake |
| Brake type | Drum brake |
| Suspension | Telescopic fork |
| Suspension | Swing arm |
| Shock absorber | Coil spring, oil damper |
| Shock absorber | Coil spring, oil damper |
| Wheel travel | 140 mm |
| Wheel travel | 98 mm |
| Ignition system | TCI |
| Generator system | AC generator |
| Battery type/capacity | 12N 12A-4A/12V 12AH |