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1. GENERAL INFORMATION MXU 300/250
SPECIFICATIONS (MXU 250)
Model No. LB50 Air cleaner type & No Wet type element
Fuel System
Name & Type MXU 250 12.5 L (2.63 lmp
Fuel capacity
Overall length 1810 mm (72.4 in) gal, 3.25 US gal
Carburetor
Overall width 1050 mm (42 in) Type PTG
Overall height 1110 mm (44.4 in) Main jet NO. 98
Wheel base 1170 mm (46.8 in) Venturi dia. 22 mm (0.88 in)
Engine type O.H.C. Throttle type PISTON
Displacement 249 cm3 (15.2 cu-in) Full transistor
Ignition System
Electrical Equipment
Type
Fuel Used 92# nonleaded gasoline digital ignition
Front wheel 112 kg (246 lbs) Ignition timing 5°BTDC/1000rpm
Dry weight Rear wheel 102 kg (224 lbs) Spark plug DPR7EA-9
Total 214 kg (471 lbs)
Front wheel 116 kg (255 lbs) Spark plug gap 0.60.7mm (0.002
0.003 in)
Curb weight Rear wheel 110 kg (242 lbs)
Battery Capacity 12V12AH
Total 226 kg (497 lbs)
Dry, centrifugal
Tires Front wheel 22*7-10 Clutch type
automatic
Rear wheel 22*10-10
Clutch operation system Automatic (V-belt)
Ground clearance 125 mm (5 in)
Drive Train
Helical gear/spur
Min. turning radius 2900 mm (116 in) Primary reduction system gear
Starting system Electric/Recoil starter
Secondary reduction system Chain drive
Type Gasoline, 4-stroke
Primary reduction ratio 26.5
Cylinder arrangement Single cylinder
Secondary reduction ratio 10.02
Combustion chamber type Semi-sphere
Reverse ratio 50.9
Valve arrangement O.H.C., chain drive
Bore x stroke 72.7 x 60 mm FR/RR tire rolling 1759/1759 mm
Moving Device
(2.9 x 2.4 in) circumference (71.8/71.8 in)
Compression ratio 10.3:1 Front 0.28 kg/cm (28
15 kgf/cm (1500kPa, Tire pressure Kpa, 3.2 psi)
Compression pressure Rear
213 psi)
Turning Left 40°
Intake valve Open 8.1° BTDC
Engine
angle Right 40°
(at 1 mm lift) Close 41° ABDC
Exhaust valve Open 37° BBDC Brake system type Front Disk brake
(at 1 mm lift) Close 7.9° ATDC Rear Disk brake
Valve clearance Intake 0.1 mm (0.004 in) Front Double wishbone
(cold) Exhaust 0.1 mm (0.004 in) Suspension type
Idle speed (rpm) 1500rpm Rear Link suspension
Lubrication type Forced pressure &
System
Lubrication
Wet sump Frame type Double cradle
Oil pump type Trochoid
Oil filter type Full-flow filtration
Oil capacity 1.6 L (1.4 lmp qt, 1.7
Us qt)
Oil exchanging 1.4 L (1.23 lmp qt,
capacity 1.48 Us qt)
Cooling Type Liquid cooled
1-2