The swingarm is newly designed for the 2007. The front part of the swingarm is cast and the main arms are extruded. Along with the new swingarm comes a newly designed suspension link for better suspension performance. The RM-Z250 gets Renthal handlebars for 2007. Renthal supplies tapered bars that are secured by an aluminium steering stem nut with rubber mounts. The SHOWA forks of the RM-Z250 are the same as the forks on the RM-Z450. The forks are optimised for better cornering performance and straightline stability. The new shock absorber offers better performance and is valved. A gripper seat cover is standard equipment
| Overall length: | 2165mm (85.2in) |
| Overall width: | 830mm (32.7in) |
| Overall height: | 1260mm (49.6in) |
| Wheelbase: | 1465mm (57.7in) |
| Seat height: | 955mm (37.6in) |
| Dry Mass: | 92kg (202.8lbs) |
| Fuel capacity: | 7.0litres (1.5gallons) |
| Engine capacity: | 249cc |
| Engine: | 4-stroke, liquid-cooled, DOHC |
| Bore: | 77.0 x 53.6 mm |
| Compression ratio: | 13.4:1 |
| Lubrication: | Suzuki Advanced Sump System |
| Ignition: | Digital AC-CDI |
| Fuel system: | KEIHIN FCR 37 MX |
| Transmission: | 5-speed, constant mesh |
| Drive: | Chain |
| Front suspension: | SHOWA 47mm telescopic, pneumatic forks/coil spring, oil damped |
| Rear suspension: | Swingarm, link type, SHOWA piggyback-reservoir shock |
| Front brakes: | Disc |
| Rear brakes: | Disc |
| Front tyres: | 80/100-21 |
| Rear tyres: | 100/90-19 |