VESPA 150, Service Station Manual, Page: 13 / 249

Name Torque in Nm
Cylinder stud bolt fitting See section ENGINE/LUBRICATION/STUD BOLT
Throttle body clamp screws 1.3 - 1.7 (0.9 - 1.2 lb*ft)
Tensioner spring retaining screw 5 - 6 (3.7 - 4.4 lb*ft)
Fastener chain tensioner 11 - 13 (8.1 - 9.5 lb*ft)
Thermostat cover screws 3 - 4 (2.2 - 2.9 lb*ft)
Pressure reducer counterweight retainer screw 7 - 8.5 (5.2 - 6.2 lb*ft)
Injection manifold fixing screws 11 - 13 (8.1 - 9.5 lb*ft)
Valve clearance adjustment screw 6 - 9 (4.4 - 6.6 lb*ft)
Spark plug tightening 10 - 12 (7.4 - 8.8 lb*ft)
Timing system sprocket fixing screw 4 - 6 (2.9 - 4.4 lb*ft)
Screws fixing cylinder to crankcase 10.8 - 12.7 (7.9 - 9.4 lb*ft)
Head blow by 3 - 4 (2.2 - 2.9 lb*ft)
TRANSMISSION AND FINAL REDUCTION
Name Torque in Nm
Transmission cover screws 11 - 13 (8.1 - 9.5 lb*ft)
Final reduction cover screws 24 - 27 (17.7 - 20 lb*ft)
Driven pulley fixing nut 53 - 59 (40 - 43.5 lb*ft)
Hub oil drain screw 15 - 17 (11 - 12.5 lb*ft)
Freewheel fixing screws 10 - 11 (7.4 - 8.1 lb*ft)
Driving pulley retainer nut 75 - 83 (55 - 61 lb*ft)
LUBRICATION
Name Torque in Nm
Crankcase timing cover screws 11 - 13 (8.1 - 9.5 lb*ft)
Screws fixing oil pump to crankcase 4 - 6 (2.9 - 4.4 lb*ft)
Pump rod screw 13 - 15 (9.5 - 11 lb*ft)
Minimum oil pressure sensor locking 12 - 14 (8.8 - 10.5 lb*ft) (LOCTITE 5091 Edge closure between
metal body and plastic block)
Overhaul data
Assembly clearances
Cylinder - piston assy.
CYLINDER - PISTON (125)
Specification Desc./Quantity
Piston diameter 51.961 (±0.014) mm
Cylinder diameter 52 (+0.008 -0.020) mm
Vespa Primavera125 - 150 i.e. 3Valvole (2013)
Characteristics
CHAR - 13