PIAGGIO B 250 - Cylinder Head

MUFFLER
Name Torque in Nm
Screw fixing manifold to muffler 15.5 ÷ 18.5
Muffler heat guard fixing screw 5 - 6
Exhaust fumes inlet screw 22 ÷ 26
Screw fixing muffler support arm to crankcase 33 ÷ 41
Nuts fixing muffler to support arm 27 ÷ 30
Nut fixing muffler to cylinder head 16 ÷ 18
LUBRICATION
Name Torque in Nm
Hub oil drainage plug 15 ÷ 17
Oil filter on crankcase fitting 27 ÷ 33
Engine oil drainage plug/mesh filter 24 ÷ 30
Oil filter 4 ÷ 6
Oil pump cover screws 0.7 ÷ 0.9
Screws fixing oil pump to crankcase 5 - 6
Oil pump control crown screw 10 ÷ 14
Oil pump cover plate screws 4 ÷ 6
Oil sump screws 10 ÷ 14
Minimum oil pressure sensor 12 ÷ 14
CYLINDER HEAD
Name Torque in Nm
Spark plug 12 ÷ 14
Nuts fixing head to cylinder (1) (^) 9 ÷ 11 + 180°
Head fixing side screws 11 ÷ 12
Starter ground screw 7 ÷ 8.5
M5 side screw fastening washers on cam shaft (125 cc) 7 ÷ 8,5
Tappet set screw lock nut 6 ÷ 8
Timing chain tensioner slider screw 10 ÷ 14
Starter ground support screw 11 ÷ 15
M6 central screw fastening washers on cam shaft (125 cc) 11 ÷ 15
Timing chain tensioner support screw 11 ÷ 13
Timing chain tensioner central screw 5 - 6
Camshaft retention plate screw 4 ÷ 6
TRANSMISSION
Name
Torque in Nm
Belt support roller screw 11 ÷ 13
Clutch unit nut on driven pulley 45 ÷ 50
Drive pulley nut 75 ÷ 83
Transmission cover screws 11 ÷ 13 Nm
Driven pulley shaft nut 54 ÷ 60
Rear hub cover screws 24 ÷ 27
FLYWHEEL
Name
Torque in Nm
Flywheel cover fixing screws 5 - 6
Stator assembly screws (°) 3 ÷ 4
Flywheel nut (125) 52 ÷ 58
Flywheel nut (250) 94 ÷ 102
Pick-Up clamping screws 3 ÷ 4
Screw fixing freewheel to flywheel 13 ÷ 15
CRANKCASE AND CRANKSHAFT
Name
Torque in Nm
Internal engine crankcase bulkhead (transmission-side half
shaft) screws
4 ÷ 6
Engine-crankcase coupling screws 11 ÷ 13
Starter motor screws 11 ÷ 13
Crankcase timing system cover screws (°) 3.5 ÷ 4.5
Characteristics B 125-250
CHAR - 16