Name: Yamaha YP250R 2005
Brand: Yamaha
Rating: 5 (1 reviews)

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ENG

VALVES AND VALVE SPRINGS

5. Measure:

• valve margin thickness a

Out of specification → Replace the valve.

Valve margin thickness

Intake

0.80 ~ 1.20 mm

(0.0315 ~ 0.0472 in)

<Limit> 0.5 mm (0.02 in)

Exhaust

0.80 ~ 1.20 mm

(0.0315 ~ 0.0472 in)

<Limit> 0.5 mm (0.02 in)

6. Measure:

• valve stem runout

Out of specification → Replace the valve.

NOTE:

• When installing a new valve, always replace

the valve guide.

• If the valve is removed or replaced, always

replace the oil seal.

Valve stem runout

0.010 mm (0.0004 in)

EAS00240

CHECKING THE VALVE SEATS

The following procedure applies to all of the

valves and valve seats.

1. Eliminate:

• carbon deposits

(from the valve face and valve seat)

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Yamaha YP250R 2005 Specifications

General