Engine Specifications Urban 125 - Beta Urban 125 Service Manual

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ENGINE URBAN 125
Type ................................ Single-cylinder, forward-inclined, four-stroke, SOHC
Bore x stroke ............................................................................ 54X54 mm
Displacement .............................................................................. 124 cm
Compression ratio ............................................................................. 10:1
Carburettor .................................................... MIKUNI UCAL 5Nh Ø 26-38
Lubrication ............................................................................... oil in sump
Fuel system .... petrol (unleaded, with a minimum octane number of 95), by carburettor
Cooling system ................................................................. by air circulation
Spark plug ........................................................................ NGK DR7 HSA
Clutch ..................................................................... multiple-disc in oil bath
transmission ............................................. 5-speed, with constant-mesh gears
Primary gearbox ratio ..................................................................... 68/20
Final gearbox ratio ......................................................................... 60/14
Gear ratios
Drive chain ..................................................... REGINA 1/2, 5/16 P. 136
Play of valves ...................... intake mm 0.08 - 0.12 , exhaust mm 0,10 - 0,14
Starting ................................................................. electric and/or kick-start
Engine oil ............................................................. BARDAHL XTM15W 50
Engine oil capacity ...................................................... 1,000 ml/1,050 ml
GB
1st ...................................................................... 37/14
2nd ..................................................................... 32/18
3rd ..................................................................... 25/19
4th ...................................................................... 23/22
5th ...................................................................... 21/24
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