Brand New for 2008 - Suzuki RM-Z450

Suzuki's 2008 RM-Z450 is the first production motocross machine to feature electronic fuel injection.

The system, which has been tested by Suzuki's factory riders, offers better roll on power and an improved low-to-mid range delivery via an internal battery-less fuel pump located inside the fuel tank and specially designed Keihin carburettor.

Other revisions to the engine include revised intake port and cam timing which reduces intake resistance and improves efficiency and boosts engine performance. The flywheel inertia is also increased to produce a smoother revving engine and improve overall acceleration.

The combustion chamber has been redesigned for better power output and improved low-to-mid response and a narrower intake and exhaust valve angle, along with increased squish areas, improve air and fuel mixing.

The five-speed gearbox also has an all new link type shifting mechanism.

Other changes include an all-new frame, which is lighter and has improved rigidity balance for better handling. A new Showa rear shock features a redesigned damper case and modified internal structure for a better controlled feel and increased bottoming resistance. The rear swingarm is also redesigned and has a thinner wall to reduce weight.

2008 RM-Z450 Specifications

Overall length: 2185mm (86.0 in.)
Overall width: 830mm (32.7 in.)
Overall height: 1260mm (50.0 in.)
Wheelbase: 1480mm (58.3 in.)
Ground clearance: 350mm (13.8 in.)
Seat height: 955mm (37.6 in.)
Dry weight: 101.5kg (224 lbs.)
Engine type: 4-stroke, liquid-cooled, DOHC
Bore: 96.0 mm
Stroke: 62.1 mm
Displacement: 449 cm3 (cc)
Compression ratio: 12.8:1
Fuel system: KEIHIN FI 43mm
Lubrication system: Suzuki Advanced Sump System
Clutch: Wet multi-plate type
Transmission: 5-speed constant mesh
Primary reduction ratio: 2.625 (63/24)
Gear ratio Low: 1.800 (27/15), 2nd: 1.471 (25/17), 3rd: 1.235 (21/17), 4th: 1.050 (21/20), 5th: 0.909 (20/22)
Final reduction ratio: 3.846 (50/13)
Front suspension: SHOWA 47mm telescopic forks, pneumatic/coil spring, oil damped.
Rear suspension: Swingarm, link type, SHOWA piggyback-reservoir shock
Caster: 25?30'
Trail: 111 mm (4.4 in.)
Front brake: Disc
Rear brake: Disc
Front tyre size: 90/ 100-21
Rear tyre size: 120/ 80-19
Fuel tank capacity: 6.2 L (1.6 US gal.)
Body colour: Champion Yellow No.2 (YU1)