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Yamaha YP125R Service Manual

Yamaha YP125R
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V-BELT AUTOMATIC TRANSMISSION (YP250R)
5-95
EAS24680
CHECKING THE PRIMARY SHEAVE
1. Check:
Primary sliding sheave
Primary fixed sheave
Spacer
Cracks/damage/wear Replace the primary
sliding sheave and primary fixed sheave as a
set.
EAS24690
CHECKING THE PRIMARY SHEAVE
WEIGHTS
The following procedure applies to all of the pri-
mary sheave weights.
1. Check:
Primary sheave weight
Cracks/damage/wear Replace.
2. Measure:
Primary sheave weight outside diameter
Out of specification Replace.
EAS24700
CHECKING THE PRIMARY SHEAVE
SLIDERS
1. Check:
Primary sheave slider
Cracks/damage/wear Replace.
EAS24710
CHECKING THE SECONDARY SHEAVE
1. Check:
Secondary fixed sheave
Secondary sliding sheave
Cracks/damage/wear Replace the sec-
ondary fixed and sliding sheaves as a set.
2. Check:
Torque cam groove 1
Damage/wear Replace the secondary
fixed and sliding sheaves as a set.
3. Check:
Guide pin 2
Damage/wear Replace the secondary
fixed and sliding sheaves as a set.
4. Check:
Spring free length
Out of specification Replace the spring.
EAS24720
ASSEMBLING THE PRIMARY SHEAVE
1. Clean:
Primary fixed sheave
V-belt width
23.0 mm (0.91 in)
Limit
21.0 mm (0.83 in)
Weight outside diameter
20.0 mm (0.79 in)
Limit
19.5 mm (0.77 in)
Compression spring free length
102.4 mm (4.03 in)
Limit
90.0 mm (3.54 in)

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Yamaha YP125R Specifications

General IconGeneral
Engine TypeLiquid-cooled, 4-stroke, SOHC, 4-valve
Bore x Stroke52.4 mm x 57.9 mm
Fuel SystemFuel Injection
Ignition SystemTCI
TransmissionV-Belt Automatic
Front SuspensionTelescopic fork
Rear SuspensionUnit Swing
Front BrakeHydraulic single disc, Ø267 mm
Starter SystemElectric
Rear Tyre140/70-14M/C 62P (Tubeless)

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