4T YX Engine - 125cc (Classic Start)

Réf : YX125GN See the description
299.99€ 50.00€
249.99€
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Ignition (option)
Carburetor (optional)

In stock

More than 20 parts in stock

Pourquoi vous allez l'adorer !  

  • Official Distributor of YX© engines
  • 4-Speed Manual Gearbox (N1234)
  • Ideal for beginners and progressive power!
  • Number of HP: 9hp

125cc YX Engine Classic Start for Dirt Bike, Pit Bike

The 125cc YX engine is built to withstand the rigors of off-road competition. Its durability is essential to ensure consistent performance during long racing sessions and intensive training.

Easy maintenance: Another advantage of this engine is its ease of maintenance. With a simple and well-thought-out design, regular maintenance is easy to perform, allowing riders to spend less time in the garage and more time on the track.

Versatility: Although this engine is mainly used in off-road racing, its versatility also allows it to adapt to other applications such as pit bikes and recreational motorcycles.

Power: 10hp

Bore: 54mm

Speed: 4-speed manual N1234

Cast iron cylinder


Attention: Arrival without kick starter, without shifter, and without intake pipe

(Many replicas exist for this engine, we guarantee the official origin from the YX factory and warn against copies present on the market)

Compatible with all brands of dirt bike, pit bike (YCF / GUNSHOT / CRZ / PISTERPRO / ORION...)

Starting advice: We recommend an engine oil change at startup as well as a break-in of 3 full tanks at half throttle. All settings are done at the factory but a valve adjustment may be necessary during the break-in if you observe kickback/compression returns or at the exhaust valve (Timing: 0.05 Intake / 0.08 Exhaust)

For more information, please refer to the technical data tab

Description of Ignition and Carburetor Stages

Ignition

-Stage 1 (18 euros)

Wiring harness + standard 1-pin CDI + NGK type ignition coil (ref: P0296 + P0299 + P0298-BK)

-Stage 2 (30 euros)

Wiring harness + CNC racing 1-pin CDI + red NGK type ignition coil (ref: P096 + P0298 + P0301)

Carburetor

-Stage 1 (45 euros)

MIKUNI 26 Carburetor + US1 Air Filter (ref: P0020 + US-38-BK)

-Stage 2 (49 euros)

MOLKT 26 Carburetor + US1 Air Filter (ref: P0023 + US-44-BK)

YX Officielle© ranges - from 88cc to 160cc!

A large choice of regrouping YX engines, 88cc, 110cc, 125cc, 140cc, 150cc, 160cc! Parfait pour tous les niveaux!

4 Stroke / 2 Stroke
4 Stroke
4 Stroke
4 Stroke
4 Stroke
4 Stroke
Engine Capacity
88cc
110cc
110cc
125cc Lifan
125cc Lifan
Maximum Power
4.1/8000 kw/rpm
-
5,4Kw/7500 trs/min
6,8Kw/8000 trs/min
-
Clutch
Automatic
Automatic
Semi-Auto (88cc, 107cc, 125cc)
Automatic
Manual N Start Gear
Number of CVs
5,6hp
-
7,9hp
10hp
10hp
Shipping origin
France
France
France
France
France
Start Up
Electric Start
Electric Start
Kick Start
Electric Start
Kick Start
Bore
47mm
52.4mm x 49.5mm
52.4mm x 49.5mm
52.4mm x 55.5mm
54 x 54mm
Cooling Type
Air Cooling
-
Air Cooling
Air Cooling
Air Cooling
High Engine Part
-
-
-
-
-
Horizontal/Vertical Motor
Horizontal
Horizontal
Horizontal
Horizontal
Horizontal
Kick Start Size
-
-
13,3mm (Small Size)
-
16mm (Big Size)
Low Engine Part
-
-
-
-
-
Maximum torque
5.8/5000 N.m/r/min
-
7Nm/6500 trs/min
9,5Nm/5000 trs/min
-
Disponibilité

In stock

In stock

In stock

In stock

In stock

Motorization

Kick Start Size 16mm (Big Size)
Engine Type Single Cylinder 4 Stroke 125cc YX
Engine Capacity 125cc Lifan
Cooling Type Air Cooling
Bore 54 x 54mm
Clutch Manual N Start Gear
Start Up Kick Start
Fuel Unleaded 95 / 98
Clutch Type Manual
Ignition 3 wire ignition tray (without light)
Number of CVs 10hp
Horizontal/Vertical Motor Horizontal
4 Stroke / 2 Stroke 4 Stroke

Cycle Parts

Oil Engine Capacity 900 ml

Chain and Drive

Chain Size 420
Sprocket Size 17mm

Others

Warranty 1 month (parts only)
Brand YX
Vintage 2025
Type of bike Dirt Bike, Pit Bike
Shipping origin France
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YX125GN

Specific References

ean13
3667155106468

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