Specifications:

Displacement: 125cc

Type: Horizontal, single-cylinder, 4-stroke, air-cooled

Compression ratio: 9.0: 1

Front sprocket   420 – 17mm – 14T

Transmission: 4-speed 3 forward 1 reverse gear

Bore x Stroke: 2.06″ x 2.19″(52.4mm x 55.5mm) 

Top Engine Mount : 92mm

Bottom Engine Mount: 82mm 

Bolt to Bolt :152mm (6″)

Rated Power & Rotating Speed: 5.8 kw/7500r/min±375 r/min

Max. Torque & Rotating Speed: 8.5 N.m/5000r/min±250 r/min

Idle speed 1500 r/min±100r/min

Ignition: CDI

Wiring:

1. Five wires (Plug): For gear indicator

2. Yellow wire: For storage battery

3. Pink (or Yellow) wire: For storage battery

4. Black & Red wire: For signal trigger

5. Green wire: For grounding

6. Blue & White: For trigger coil

Product Features

• This 125cc Semi-Auto Engine has reverse gear suitable for ATV UTV 4 Wheelers
• Speed complete racing engine, 3 forward 1 reverse gear
• Upgrade your stock 50cc to this 125cc monster, you can feel the power difference immediately
• See below description for more specifications and wiring