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MZ 125 SX
2005Off-road

MZ 125 SX

Key specifications

Engine
125 cc
Weight
92 kg
Fuel type
petrol
Fuel capacity
2.0 L
Transmission
5-speed
Seat height
36 mm
Front brakes
Single disc
Rear brakes
Single disc

Overview

Introducing the 2005 KTM 125 SX, a standout in the competitive world of cross-motocross motorcycles. Designed for enthusiasts who crave speed, agility, and advanced engineering, the 125 SX is a prime choice for both novice riders and seasoned racers looking to dominate the tracks. With its lightweight build and a powerful two-stroke engine, this bike captures the essence of what it means to be a true motocross machine. Equipped with cutting-edge technology and a design ethos that focuses on performance, the 125 SX is poised to be a favorite for adrenaline junkies who thrive on the thrill of off-road racing. At the heart of the KTM 125 SX lies a robust single-cylinder, two-stroke engine with a displacement of 124.80 ccm, delivering a thrilling combination of power and responsiveness. The engine features a bore and stroke of 54.0 x 54.5 mm, ensuring a lively performance that allows riders to reach exhilarating speeds. The Keihin PWK 39 carburettor provides precise fuel delivery, while the Kokusan digital ignition system guarantees reliable starts and optimal performance. Coupled with a 5-speed gearbox and a wet multi-disc clutch operated hydraulically, the 125 SX offers exceptional control and smooth shifting, making it an exhilarating ride on the track or in the dirt. The chassis of the 125 SX is crafted from resilient chromium molybdenum, providing a lightweight yet sturdy foundation for intense riding experiences. The WP-USD front suspension with a generous 300 mm travel, paired with a WP-PDS-DA shock absorber at the rear with 335 mm travel, ensures that riders can tackle rough terrains with ease. Safety is paramount, and the bike features a dual-disc braking system, with a 216 mm front disc and a 260 mm rear disc, providing powerful stopping power when it matters most. With a ground clearance of 390 mm and a seat height of 925 mm, the bike strikes a balance between comfort and performance, allowing for better maneuverability on tricky trails. **

Pros

  • Lightweight Design: At just 92.4 kg (203.7 pounds), the 125 SX is agile and easy to handle, making it perfect for tight corners and quick maneuvers.
  • Powerful Engine Performance: The two-stroke engine delivers a thrilling ride, with quick acceleration and a responsive throttle that appeals to seasoned racers.
  • Advanced Suspension System: With impressive front and rear suspension travel, the bike absorbs bumps and shocks, providing a smooth ride over rough terrain.

Cons

  • Kick Starter Only: The absence of an electric start may be a drawback for some riders, as kick-starting can be challenging in certain situations.
  • Less Torque at Low RPMs: The two-stroke engine may not provide the low-end torque some riders desire, requiring a more aggressive riding style to optimize power.
  • Seat Height: With a seat height of 925 mm (36.4 inches), the bike may be less accessible for shorter riders, potentially limiting its appeal.

Technical details

Source specification data

Make
KTM
Model
125 SX
Category
Cross-motocross
Starter
Kick
Clutch
Wet multi-disc clutch, operated hydraulically
Gearbox
5-speed
Ignition
Kokusan digital 2K-1
Fuel System
Carburettor. Keihin PWK 39
Bore X Stroke
54.0 x 54.5 mm (2.1 x 2.1 inches)
Displacement
124.80 ccm (7.62 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, two-stroke
Lubrication System
Mixture oil lubrication 1:40
Transmission Type Final Drive
Chain
Dry Weight
92.4 kg (203.7 pounds)
Seat Height
925 mm (36.4 inches) If adjustable, lowest setting.
Fuel Capacity
7.50 litres (1.98 gallons)
Ground Clearance
390 mm (15.4 inches)
Rake
27.0°
Trail
120 mm (4.7 inches)
Frame Type
chromium molybdenum
Rear Brakes
Single disc
Front Brakes
Single disc
Rear Suspension
WP-PDS-DA shock absorber
Front Suspension
WP-USD 48 mm (1.89 inch.)
Rear Wheel Travel
335 mm (13.2 inches)
Front Wheel Travel
300 mm (11.8 inches)
Rear Brakes Diameter
260 mm (10.2 inches)
Front Brakes Diameter
216 mm (8.5 inches)