Built around Access's atv motorcycle platform, the 2025 Access Xtreme Enduro SP400S relies on a 359.3 cc (21.9 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 18.8 HP (13.7 kW), transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 52.3 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the Xtreme Enduro SP400S measures 152 kg (335 lbs) dry, translating to a power-to-weight ratio of 0.12 HP/kg (8.09 kg per horsepower). 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. The 14.8-liter (3.9 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
52.3 HP/L
Power-to-Weight
0.12 HP/kg (8.09 kg/HP)
Standover Height
870 mm (34.3 in)
Engine
Displacement359.3 ccm (21.92 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power18.8 HP (13.7 kW))
Bore x Stroke74.0 x 65.2 mm (2.9 x 2.6 inches)
Valves/Cylinder4
Fuel SystemCarburettor. PD33J
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionCDI
LubricationWet sump
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
DrivelineWith reverse
Chassis
Front SuspensionDual A-Arm
Rear SuspensionSwing Arm
Ground Clearance120 mm (4.7 inches)
Wheels & Brakes
Front Tyre21/7-10
Rear Tyre20/11-9
Front BrakesDouble disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight152.0 kg (335.1 pounds)
Power/Weight0.1235 HP/kg
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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
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.
