Tightening torques Torques for Vespa & Lambretta
Tightening torques for screws and nuts on the scooter
How tight should I tighten a screw or nut on the scooter?
Here we have compiled a list of the manufacturers' recommended tightening torques. *
After fest comes off!
It has probably happened to everyone before, the workshop wisdom: "After fest comes off!" - KNACK and it has already come true.
No problem if you've only destroyed a nut or stud, it can usually be easily replaced. It starts to get annoying when you don't have a replacement.
Thread repair: It gets really annoying when you destroy a thread in the motor housing! This is often time-consuming and usually expensive, especially if it cannot be repaired with a threaded insert, for example. Before the housing has to be replaced or welded, there is often a Thread repair with Weicon Glue possible.
Screw loose?
In addition to too tight, there is of course not enough tight! Too loosely tightened nuts or bolts can be dangerous. You don't even want to think about what can happen if wheel nuts or brake discs come loose. Loose carburetors, intake manifolds or cylinders can quickly damage the engine. Depending on the area of application, there are self-locking nuts or threadlocking !
Always one after the other!
In addition, there is also the even tightening of screws and nuts to be taken into account. Everyone knows that from changing tires, here, for example, tightening is done crosswise to ensure an even fit. In the case of engine housings and cylinder heads, for example, stresses caused by unevenly tightened stud bolts should be avoided at all costs. There are even components that need to be fastened in a certain order. Please follow the manufacturer's instructions here.
Wrong!
Right-hand thread? Left-hand thread? As a rule, nuts and bolts are tightened clockwise (to the right) and loosened counterclockwise (to the left) = normal right-hand thread. But there are also exceptions such as Lambretta pole wheel nut and left mirror: often with a left-hand thread.
Fixed!
For many purposes there are special tools, puller and particularly Holderwithout which parts usually cannot be removed at all. You will find the tool for your scooter model after the vehicle has been selected in the vehicle list:
In the case of tight connections, penetrating oil such as WD40!
torque wrench
We recommend working consistently with atorque wrench and compliance with the recommended tightening torques. We offer various torque wrenches for small and large tasks:
LAMBRETT
| original | MB Developments | |
| Flywheel / fan wheel nut | 68 Nm | 75 Nm |
| Cylinder exhaust / intake nuts | 4.7-5.2 Nm | 9.8-11.8 Nm |
| Cylinder head nuts | 19-22 Nm | 20-24 Nm |
| Ignition base plate screws | 4.7-5.2 Nm | |
| Shift claw screw (9 mm) | 4.7-5.2 Nm | |
| Nuts gear cover plate | 9.8-11.8 Nm | 14-17 Nm |
| Front pinion screw | 29-34 Nm | |
| Chain cover nuts (10 mm) | 4.7-5.2 Nm | |
| Rear brake shoe pivot pin | 4.7-5.2 Nm | |
| Nut cover plate rear wheel bearing | 4.7-5.2 Nm | |
| Brake drum nut (8 ° + 11 ° cone) | 161 Nm | |
| Brake drum nut (20 ° cone) | 203 Nm | |
| Brake drum nut securing device | 14-14.7 Nm | |
| Fork links | 54-55 Nm | |
| Front axle nut | 54-55 Nm | |
| Rim fastening nuts | 19.6-22.5 Nm | |
| Shaft seal retaining plate | 4.7-5.2 Nm | |
| Chain guide | 4.7-5.2 Nm | |
| Gear spacing | 0.07-0.30 Nm |
VESPA Largeframe -1977 (125-150 cc)
VNA-VBB, GL, GT, GTR, TS, Sprint, Super
Torques_Vespa-Largeframe-to-1977
| Nm | |
| Nuts housing halves | 12-15 Nm |
| Screw stator plate | 3-5 Nm |
| Nut clutch | 40-45 Nm (depending on the coupling up to 65) |
| Mother shaft axle nut | 30-35 Nm |
| Switch cross (left-hand thread, screw locking) | 15-18 Nm |
| Nut rotor (pole wheel) | 60-65 Nm |
| Carburetor mounting screw | 16-20 Nm |
| Clutch cover screw | 6-8 Nm |
| Outlet port (P200) | 75-80 Nm |
| Nut exhaust on the cylinder | 16-26 Nm |
| Aluminum cylinder (note manufacturer's instructions) | 14-16 Nm |
| Cylinder head nut (P 125 X, P 150 X, M7) | 16-18 Nm |
| Nut cylinder head (P 200 E, M8) | 20-22 Nm |
| Spark plug (note manufacturer's instructions) | 20-24 Nm |
| Crossbolt motor swing arm | 60-75 Nm |
| Lower shock mount nut | M9 = 14-22Nm, M10 = 16-24Nm |
| Nut, rim fastening, brake drum (v / h) | 20-22 Nm |
VESPA PX 80-200
| Nm | |
| Nuts housing halves | 12-15 Nm |
| Screw stator plate | 3-5 Nm |
| Nut clutch | 40-45 Nm (depending on the coupling up to 65) |
| Mother shaft axle nut | 30-35 Nm |
| Switch cross (left-hand thread, screw locking) | 15-18 Nm |
| Nut rotor (pole wheel) | 60-65 Nm |
| Carburetor mounting screw | 16-20 Nm |
| Clutch cover screw | 6-8 Nm |
| Outlet port (P200) | 75-80 Nm |
| Nut exhaust on the cylinder | 16-26 Nm |
| Starter motor nut (M8) | 10-15 Nm |
| Starter motor screw (M6) | 6-8 Nm |
| Aluminum cylinder | 14-16 Nm (see manufacturer information) |
| Nut cylinder head PX 125-150 (M7) | 16-18 Nm |
| Nut cylinder head PX 200, (M8) | 20-22 Nm |
| Spark plug (note manufacturer's instructions) | 20-24 Nm |
| Crossbolt motor swing arm | 60-75 Nm |
| Lower shock mount nut | M9 = 14-22Nm, M10 = 16-24Nm |
| Nut rim attachment v / h brake drum | 20-22 Nm |
VESPA Smallframe
V50, PV, ET3, PK 50-125
| V50, PV, ET3 | PK | |
| Nuts housing halves | 13-15 Nm | 13-15 Nm |
| Screw anchor plate | 3-5 Nm | 3-5 Nm |
| Kickstarter screw | 23-26 Nm | 23-26 Nm |
| Mother primary gear | 50-55 Nm | 50-55 Nm |
| Nut clutch | 40-45 Nm (depending on the coupling up to 65 /) | 40-45 Nm (depending on the coupling up to 65) |
| Shift fork screw | 17-22 Nm | |
| Magnet wheel / fan wheel nut | M10 = 45-50Nm, M12 = 60-65Nm | |
| Nut intake manifold | 6-8 Nm | 8-10 Nm |
| Exhaust manifold to cylinder (M6 / M8) | 8-10 Nm | 8-10 Nm |
| Clutch cover screw | 8-10 Nm | PK 50: 8-10 Nm PK 80-125: 9-10 Nm |
| Nut brake anchor plate | 17-22 Nm | 17-22 Nm |
| Crossbolt motor swing arm | 38-50 Nm | |
| Mother brake drum | M14 = 60-100Nm, M16 = 90-110Nm | |
| Oil fill and drain plug | 3-5 Nm | |
| Screw for gearbox fork | 17-22 Nm | |
| Bolt exhaust to engine swing arm | 18-20 Nm | 18-20 Nm |
| Screw pick up | 2-2,5 Nm | 2-2,5 Nm |
| Fan mounting screw (Dynastarter) | 8-10 Nm | |
| Mother group Dynastarter (?) | 60-65 Nm | |
| Aluminum cylinder | 13-18 Nm (see manufacturer information) | 12-18 Nm |
| Nut cylinder head | V50: 14-18 Nm | PK 50: 13-18 Nm |
| Nut cylinder head | PV, ET3: 14-18Nm | PK 80-125: 13-18 Nm |
| Nut cylinder base | V50: 12-16 Nm | PK 50: 12-16 Nm (not HP) |
| Spark plug (note manufacturer's instructions) | 14-18 Nm | 18-24 Nm |
| Nut wheel hub pin (under swing arm cover) | 50-55 Nm | 50-55 Nm |
| Lock nut front wheel axle (V50 with or without speedometer drive pinion) | 45-50 Nm | 45-50 Nm |
| Ring nut of the speedometer drive | PV / ET3: 45-50 Nm | |
| Upper shock absorber mounting nut | 20-27 Nm | PK 50: 20-30 Nm PK 80-125: 30-40 Nm |
| Lower shock mount nut | 20-27 Nm | PK 50: 20-30 Nm PK 80-125: 20-27 Nm |
| Swing arm nut on the frame | 38-52 Nm | 38-52 Nm |
| Upper race of the upper steering head bearing (or hand-tight until contact with bearing balls) | 6-7 Nm (check) | 50-60 Nm (check) |
| Upper ring nut for locking the upper steering head bearing (after the tightening torque has been reached, turn the key back by approx. 1? 4 turns (80- 90 °)) | 50-60 Nm (check) | |
| Handlebar bolts | 30-44 Nm | 30-44 Nm |
| Locknut of the upper steering head bearing | 30-40 Nm | |
| Rear axle nut | 90-110 Nm | 90-110 Nm |
| Nuts rims v / h on brake drum | 23-27 Nm | 20-27 Nm |
| Central nut front wheel | 75-90 Nm | PK 50: 50-80 Nm PK 80-125:? |
* We have worked here to the best of our knowledge, but all information is provided without guarantee.
