Yinxiang

YX 70cc Kick Start Semi-Auto (Motor Only)

Name: YX 70cc Kick Start Semi-Auto (Motor Only)
Brand: Yinxiang
SKU: YX70-YXM-KSSA-SNB
Price: 339.0 USD
Availability: InStock

Tags: Crate motors, Lifan 125

SKU: YX70-YXM-KSSA-SNB

$339.00

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CT70 70cc Plug-and-Play Modern Replacement Engine Kit →

This YX 70cc engine is built on the classic Honda horizontal 2-bolt motor mount pattern, making it a direct bolt-in replacement for a wide range of Honda 50–70cc platforms, not just CT70. It retains the exact physical size of a stock CT70 motor, while upgrading airflow, ignition output, and overall performance.

Equipped with larger valves and a modern full-wave stator, this engine delivers strong usable power and reliable 12-volt lighting output (which can be regulated down to 6V) without changing the look or fitment of your bike. The semi-automatic transmission keeps things simple and rider-friendly — no clutch lever required.

This is an ideal engine for restorations, trail bikes, pit bikes, and vintage mini builds where factory fitment matters but modern reliability is the goal.

Key Features

Same physical size as a stock CT70 engine
Honda horizontal 2-bolt mounting pattern
Larger valves for improved airflow and power
Modern full-wave stator with lighting output
Semi-automatic transmission (no clutch lever)
4 Speed
Kick-start simplicity and reliability

Engine Type	4 Stroke, 2 Valve, Single Cylinder Oil Cooled, 2 Bolt Horizontal
Displacement	72cc
Power	8.9 HP
Compression Ratio	9.36:1
Bore / Stroke	52mm x 55.5mm
Fuel	91 Octane
Recommended Engine Oil	10W-40
Starting	Kick Start (14MM Shaft)
CDI	Yes
Lighting Output	Yes
Clutch	Semi-Automatic (No clutch lever)
Shift Pattern	4 Speed 1-N-2-3-4