Yamaha MBK MW125 2014, Service Manual

Page: 34 / 380

ENGINE SPECIFICATIONS
2-5
Big end radial clearance 0.004–0.014 mm (0.0002–0.0006 in)
Clutch
Clutch type Dry, centrifugal automatic
Automatic centrifugal clutch
Clutch shoe thickness 3.3 mm (0.13 in)
Limit 1.5 mm (0.06 in)
Clutch shoe spring free length 29.9 mm (1.18 in)
Clutch housing inside diameter 120.0 mm (4.72 in)
Limit 120.5 mm (4.74 in)
Compression spring free length 148.4 mm (5.84 in)
Limit 142.7 mm (5.62 in)
Weight outside diameter 20.0 mm (0.79 in)
Limit 19.5 mm (0.77 in)
Clutch-in revolution 2450–2850 r/min
Clutch-stall revolution 4900–5500 r/min
V-belt
V-belt width 22.0 mm (0.87 in)
Limit 21.0 mm (0.83 in)
Transmission
Transmission type V-belt automatic
Primary reduction ratio 1.000
Secondary reduction ratio 9.533 (44/15 x 39/12)
Gear ratio 2.361–0.794 :1
Main axle runout limit 0.08 mm (0.0032 in)
Drive axle runout limit 0.08 mm (0.0032 in)
Air filter
Air filter element Oil-coated paper element
Fuel injector
Model/quantity 1100-01390-B/1
Throttle body
Type/quantity AC28/1
ID mark 2CM1 00
Fuel injection sensor
Crankshaft position sensor resistance 228–342
Ω
(W/L-W/R)
Intake air pressure sensor output voltage 3.94–4.06 V@101.3 kPa (3.94–4.06 V@1.01
kgf/cm², 3.94–4.06 V@14.7 psi)
Intake air temperature sensor resistance 5–6
Ω
@0 °C (5–6
Ω
@32 °F)
Coolant temperature sensor resistance 5166–6314
Ω
@0 °C (5166–6314
Ω
@32 °F)
Coolant temperature sensor resistance 288-352
Ω
@80 °C (288-352
Ω
@176 °F)
Idling condition
Fuel line pressure at idling 300–390 kPa (3.0–3.9 kgf/cm², 43.5–56.6 psi)
Engine idling speed 1500–1700 r/min
Throttle grip free play 3.0–7.0 mm (0.12–0.28 in)