LONCIN YF300 User Manual

4
Technological parameters for main performance
Items
Type
YF300
Type
LX178MN
Style
Single cylinder, 4 stokes, standing type engine,
water cooled, 4 air valves, double OHV
Main
parameters
for
performance
Max. power and its
rotation speed
(19.3±5%)kW/(8500±1.5%)rpm
Max. torque and its
rotation speed
（24.5±5%）N·m/（7000±1.5%）rpm
Min. fuel consumption
≤340 g/km·h
Min. steady rotation
speed of idling
（1500±150）rpm
Main
parameter
for structure
Cylinder bore
78mm
Piston stroke
61.2mm
Total displacement
292.4ml
Compression ratio
11.0：1
Air intake
OHV
Ignition
CDI
Lubrication
Pressure and splash
Cooling
Water
Transmission
device
Type of clutch
Manual operation clutch, wet and plates
Gearshift
International gearshift
Primary ratio
2.864
1
st
gear
3
2
nd
gear
2
3
rd
gear
1.5
4
th
gear
1.25
5
th
gear
1.05
6
th
gear
0.905
Starting
Foot and electrical
Carburetor
Vacuum and diaphragm MV34-5A
Ignition advance angle curve or
working-set point
1700±200r/min when 0˚ ± 1˚
5000± 200r/min when 25˚ ± 1˚
Spark plug
Resistive B8RC
Lockage angle for air intake
valve
Open
BTDC 0° （Open is 1）
Close
ABDC 40°（Close is 1）
Lockage angle for air exhaust
valve
Open
BBDC 37°（Open is 1）
Close
ATDC 2° （Close is 1）
Brand of lubricant
15W/40-SE
Capacity of lubricant (mL)
1500±100mL
Net weight of lubricant (㎏)
34±1kg

LONCIN YF300 Specifications

General

Brand	LONCIN
Model	YF300
Category	Engine
Language	English