At the heart of the 2025 Access Xtreme Supermoto 450 EFI atv motorcycle, Access pairs a 448.8 cc (27.4 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. Internal engine geometry specifies a 11.8:1 compression ratio.
On the scales, the Xtreme Supermoto 450 EFI measures 216 kg (476 lbs) dry. Rider ergonomics and chassis geometry center around a 870 mm (34.3 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,270 mm (50 in) wheelbase engineered for quick, flickable steering geometry. The 14.8-liter (3.9 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Standover Height
870 mm (34.3 in)
Engine
Displacement448.8 ccm (27.39 cubic inches)
Engine TypeSingle cylinder, four-stroke
Compression11.8:1
Valves/Cylinder4
Fuel SystemInjection. 42mm
Fuel ControlOverhead Cams (OHC)
Ignition16-BIT ECU
LubricationWet sump, oil pump
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
DrivelineWith reverse
Chassis
Front SuspensionDual A-Arm
Rear SuspensionSwingarm
Wheelbase1270 mm (50.0 inches)
Ground Clearance120 mm (4.7 inches)
Wheels & Brakes
Front Tyre165/70-10
Rear Tyre225/40-9
Front BrakesDouble disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight216.0 kg (476.2 pounds)
Seat Height870 mm (34.3 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
