These are the known mechanical and performance specifications for your 2017 Sherco 125 XY.
Basic Specs

Engine
Displacement123.70 ccm (7.55 cubic inches)
TypeNikasil coated cylinder
DetailsSingle cylinder, four-stroke
Max RPM
Compression
Bore/Stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Valves/Cylinder
FuelingCarburettor. 20 mm
IgnitionCDI
ExhaustSteel and Aluminium
Lubrication2% oil pre-mix
CoolingLiquid
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity3.50 litres (0.92 gallons)
Emissions
Chassis
Frame TypeSingle beam: Chrome-Molybdenum steel
Rake
Trail
Front SuspensionAluminium 40 mm telescopic fork
Front Travel177 mm (7.0 inches)
Rear SuspensionAdjustable hydraulic single damper
Rear Travel165 mm (6.5 inches)
Seat
Seat Height780 mm (30.7 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance275 mm (10.8 inches)
Wheelbase1,340 mm (52.8 inches)
Dry Weight83.5 kg (184.1 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre1.60-21
Rear Tire/Tyre2.10-18
Front BrakesSingle disc
Front Brake Diameter182 mm (7.2 inches)
Rear BrakesSingle disc
Rear Brake Diameter150 mm (5.9 inches)
WheelsAnodized light alloy rims
Comments
Spanish brand.