PIAGGIO Beverly 300 i.e. - Page 21

Measure the camshaft bearing seats and rocking
lever support pins with a bore meter
HEAD BEARINGS
Specification Desc./Quantity
bearing «A» Ø 12.000 - 12.018 mm
bearing «B» Ø 20.000 ÷ 20.021 mm
bearing «C» Ø 37.000 - 37.025 mm
Measure the unloaded spring length
Characteristic
Standard length
40.2 mm
Allowable limit after use:
38.2 mm
- Remove any carbon deposits from the valve
seats.
- Check the width of the mark on the valve seat
«V» with Prussian blue.
Characteristic
Standard value:
1 - 1.3 mm
Admissible limit:
1.6 mm
- If the width of the mark on the valve seat is larger than the prescribed limits, true the seats with a 45°
milling cutter and then grind.
- In case of excessive wear or damage, replace the head.
STANDARD VALVE LENGTH
Specification
Desc./Quantity
Valve check Standard length Intake: 94.6 mm
Valve check Standard length Exhaust: 94.4 mm
Beverly 300 i.e. Characteristics
CHAR - 21