New Pony to My Stable - YBR 125

YBR 125 - electric start, air cooled 4-stroke SOHC engine which provides a feeling of solidity & robustness and satisfactory mileage.




Engine type Air-cooled, 4-stroke, SOHC
Displacement 123 cc
Bore & Stroke 54.0 × 54.0 mm
Compression ratio 10.0:1
Maximum power 10.88PS@7,500 rpm

Maximum torque 10.40N.m / 6,500 rpm

Starting system Electric Start
Lubrication wet sump
Cylinder layout Forward inclined Single cylinder
Clutch type Wet, multiple disc
Ignition system DC CDI
With Oil and Fuel 126kg
Fuel Supply Carburettor
Primary/Secondary reduction ratio 3.400/3.214
Transmission Type Constant mesh 4-speed
Gear ratios 1st=3.000, 2nd＝1.687, 3rd:=1.200, 4th=0.875
Caster/Trail 26.4 degree/90 mm


Frame type Diamond
Battery 12 V, 5.0 Ah
Headlight 12 V, 35W/35 W x 1
Suspension(Front/Rear) Telescopic/Swing arm
Brake Type(Front/Rear) Drum/Drum
Tyre size(Front/Rear) 2.75-18" 4PR/3.00-18 6PR
Seat Height 795mm

Overall length x width x height 2,065mm x 730mm × 1,100mm
Wheelbase 1300mm
Minimum ground clearance 180mm
Engine oil volume 1.1 liters
Fuel tank capacity 13.6 liters

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• Four-Stroke Carburetors - Jetting (hydro-carbons.blogspot.com)
• How to Repair Small Engines part1-Small Engine Basics (hydro-carbons.blogspot.com)
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