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Feature

This 125cc Semi-Auto Engine suitable for Honda 50 and 70 serial motorcycle
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

Description

Specifications:

Displacement: 125cc

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

Compression ratio: 9.0: 1

Front sprocket 420 - 17mm - 14T

Transmission: 4-speed 1 down 3 up

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/min375 r/min

Max. Torque & Rotating Speed: 8.5 N.m/5000r/min250 r/min

Idle speed 1500 r/min100r/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

Fitment:

This motor should fit the following models:

HONDA CRF50 / CRF70 / XR50 / XR70 / Z50 / Z50R / CT70 Mini Trail / Z50 / Minitrail Monkey / XL70 ST70 / QA50 / QR50 / CL70 / SL70 / 70 Passport / ST 90K2 / ST 90K1 / CS 90 / SL 90 / ZB 50

However, for some year and model, you may need a rear bracket to make it fit.