Service manual

ManualsBrandsYamaha ManualsAutomotiveJOGR JOGRR CS50M

ENG

INSPECTION AND REPAIR

4-15

EAS00265

CHECKING THE PISTON PIN AND PISTON

PIN BEARING

1. Check:

• piston pin

Blue discoloration/grooves



Replace the

piston pin and then check the lubrication

system.

2. Measure:

• piston pin outside diameter

a

Out of specification



Replace the piston

pin.

3. Calculate:

• piston-pin-to-piston clearance

Out of specification



Replace the piston

pin and piston as a set.

4. Inspect:

• bearing (piston pin)

Pitting/Damage



Change

Piston pin outside diameter

9.996 ~ 10.000 mm

Piston-pin-to-piston clearance

0.004 ~ 0.017 mm

<Limit>: 0.07 mm

Piston-pin-to-piston clearance=

Piston pin bore diameter

b -

Piston pin outside diameter

a