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4T YX 125cc Engine (Classic Start)

Ref: YX125-NS See the description
299.00€ 40.00€
259.00€
13x 14x 16x 18x 24x ...
22.43 €   /  months
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Ignition (option)
Carburetor (optional)

In stock

Order it before 14:00 of tomorrow and receive it between 10/2/26 and 10/5/26 with Schenker

More than 20 parts in stock

Must-haves

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: 52.4mm

Speed: 4-speed manual N1234

(Many replicas exist of 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 mid-range. All settings are done at the factory, however, 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 visit 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 (59 euros)

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

-Stage 2 (69 euros)

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

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 Any Gear Start (Can be start with any gear up)
Start Up Kick Start
Fuel Unleaded 95 / 98
Clutch Type Manual
Ignition 3 wire ignition tray (without light)
Brand Engine YX
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
Type of bike Dirt Bike, Pit Bike
Shipping origin France
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YX125-NS

Specific References

ean13
3667155001510

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