2018 Suzuki RMX450Z





Powerful, torquey fuel-injected 449cc engine. Slim, aggressively styled chassis and bodywork. Electric starter. Full-function, two-mode instrument cluster. Enduro lighting. Additional chassis protection. Sharing core technologies with Suzuki’s Championship-winning open-class RM-Z450, the RMX450Z rewrites the rules for serious trail riders.

Key Features
  • Fuel-injected engine is based on Suzuki's winning open-class motocrosser; the RM-Z450.
  • Trail-ready features include an electric starter powered by a compact battery (plus kick-start back-up), a coolant reservoir tank and an engine protector plate.
  • Enduro ready, full-function instrument cluster includes a low fuel level warning light.
  • The airbox features a hinged lid for quick air-filter maintenance.
  • Aluminum-alloy twin-spar frame with high-performance SHOWA fork and piggyback-reservoir style rear shock.
  • Competition-developed seat and slim bodywork creates a controllable, ergonomic riding position.
  • Racing-inspired graphics and colors include fork clamps that are anodized black, complementing the gold fork leg finish.
  • Black anodized EXCEL aluminum rims are ready to withstand rugged off-road conditions.
Engine Features
  • 449cc 4-stroke, 4-valve, liquid-cooled, fuel-injected DOHC powerplant is based on the high-performance and reliable RM-Z450.
  • Minimal differences as compared to the RM-Z450 motocross engine includes a modified inlet tract and revised cam profiles to increase low and mid-rpm power.
  • The compact aluminum cylinder is finished with Suzuki Composite Electrochemical Material (SCEM) coating for durability, light weight and efficient heat transfer.
  • A larger magneto-generator is fitted to charge the battery and power the lights. The increased mass also aids traction.
  • Advanced fuel-injection system makes for extra-smooth power delivery, high fuel efficiency, and superb reliability.
  • The airbox features a hinged lid for quick air-filter maintenance and better protection from debris.
  • The coolant reservoir tank has a specially located filler cap for easy access.
Transmission Features
  • Strong 5-speed transmission with wide gear ratios and primary/final drive ratios selected to suit various situations from steep trails to open terrain.
Chassis Features
  • The aluminum-alloy twin-spar frame combines cast and extruded sections to achieve low weight with high rigidity and durability.
  • RM-Z450-derived trail-ready suspension uses high-performance SHOWA forks with full adjustability.
  • Aluminum, link-style swingarm is descended from the RM-Z line and uses a fully adjustable SHOWA piggyback-reservoir style rear shock.
  • Rear suspension linkage geometry combines the RM-Z series' renowned turning-on-rails abilities with optimized handling performance for trail rides.
  • Race-inspired waved disc rotors are mounted to black EXCEL aluminum rims with stainless steel spokes.
  • High-impact, black plastic fork leg, plus rear brake rotor and caliper protectors shield these components from trail obstacles.
  • The standard Renthal Fatbar is stronger and reduces vibration better than conventional aluminum handlebars.
  • Bright 35W headlight is smoothly incorporated into the front number plate.
  • Trim, low-draw LED taillight is neatly tucked under the lip of the rear fender.
  • The full-function, dual (sport/standard) mode instrument cluster is in a durable, ultra-compact housing.
  • Type: 4-stroke, liquid-cooled, single cylinder, DOHC
  • Displacement: 449cc
  • Bore x Stroke: 96.0 x 62.1mm (3.78 x 2.4 in.)
  • Compression Ratio: 11.6:1
  • Fuel System: Fuel Injection
  • Starter: Electric with backup kick starter
  • Lubrication: Semi-dry sump
  • Ignition: Electronic Ignition (CDI)
  • Transmission: 5-speed constant mesh
  • Final Drive: Chain, DID520MXV, 114 links
  • Overall Length: 2185 mm (86.0 in.)
  • Overall Width: 840 mm (33.1 in.)
  • Overall Height: 1265 mm (49.8 in.)
  • Wheelbase: 1485 mm (58.5 in.)
  • Ground Clearance: 320 mm (12.6 in.)
  • Seat Height: 950 mm (37.4 in.)
  • Curb Mass: 123.5 kg (272 lb.)
  • Suspension Front: Inverted telescopic, coil spring, oil damped
  • Suspension Rear: Link type, coil spring, oil damped
  • Brakes Front: Disc brake, single rotor
  • Brakes Rear: Disc brake, single rotor
  • Tires Front: 80/100-21 51M, tube type
  • Tires Rear: 110/90-18 64M, tube type
  • Fuel Tank: 6.2 L (1.6 US gal.)
  • Standard Warranty: 6 Month unlimited mileage limited warranty * Extended Warranty available through Suzuki Protection Plan (SPP)



Engine Type
4-stroke, single cylinder, DOHC
Bore and Stroke
96.0 x 62.1mm (3.78 x 2.4 in.)
Compression Ratio
Fuel System
Fuel Injection
Electronic Ignition (CDI)


Front Suspension
Inverted telescopic, coil spring, oil damped
Front Brakes
Disc brake, single rotor
Front Tire
80/100-21 51M, tube type
Rear Suspension
Link type, coil spring, oil damped
Rear Brakes
Disc brake, single rotor
Rear Tire
110/90-18 64M, tube type


Dry Weight
Curb Weight: 123.5 kg (272 lb.)
Fuel Capacity
6.2 L (1.6 US gal.)
1485 mm (58.5 in.)
Ground Clearance
320 mm (12.6 in.)
Seat Height
950 mm (37.4 in.)


5-speed constant mesh
Final Drive
Chain, DID520MXV, 114 links


6 Month unlimited mileage limited warranty


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