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- Tightening torques Torques Vespa & Lambretta
Here we have compiled a list of the recommended tightening torques from the manufacturers*.
It's probably happened to everyone, the workshop saying: "After tight comes off!" - CRACK and it's proven to be true. No problem if you've only destroyed a nut or a stud bolt, they're usually easy to replace. It starts to get annoying when you don't have a replacement. Thread repair: It gets really annoying if you have destroyed a thread in the motor housing! This is often time-consuming and usually expensive, especially if it cannot be repaired with a thread insert, for example. Before the housing has to be replaced or welded, it is often possible to repair the thread with Weicon adhesive, for example.
As well as too tight, there is of course also not tight enough! Nuts or screws that are too loose can be dangerous. It's hard to imagine what can happen when wheel nuts or brake disks come loose. Loose carburetors, intake manifolds or cylinders can quickly result in engine damage. Depending on the area of application, self-locking nuts or threadlockers are a good idea here!
In addition, there is also the even tightening of nuts and bolts to consider. I'm sure everyone knows this from changing tires, where they are tightened crosswise, for example, to ensure an even fit. Stresses caused by unevenly tightened stud bolts should also be avoided in engine housings and cylinder heads, for example. There are even components for which a certain fastening sequence must be observed. Please follow the manufacturer's instructions here.
Right-hand thread? Left-hand thread? As a rule, nuts and bolts are tightened in a clockwise direction (clockwise) and loosened counterclockwise (anticlockwise) = normal right-hand thread. However, there are also exceptions, such as Lambretta pole nuts and left-hand mirrors: often with a left-hand thread.
For many applications, there are special tools, pullers and, in particular, holders, without which parts can usually not be loosened at all. You will find the right tool for your scooter model after you have "parked" the vehicle in your garage in our store:
Creep oil such as WD40 often helps with tight connections!
We recommend working consistently with a torque wrench and adhering to the recommended tightening torques. We offer various torque wrenches for small and large tasks:
| original | MB Developments | |
|---|---|---|
| Nut flywheel/fan wheel | 68 Nm | 75 Nm |
| Cylinder exhaust/inlet 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 | |
| Gearshift claw screw (9 mm) | 4.7-5.2 Nm | |
| Gearbox cover plate nuts | 9.8-11.8 Nm | 14-17 Nm |
| Front sprocket bolt | 29-34 Nm | |
| Chain cover nuts (10 mm) | 4.7-5.2 Nm | |
| Rear brake shoe pivot bolt (ratio contr.) | 4.7-5.2 Nm | |
| Rear wheel bearing cover plate nut | 4.7-5.2 Nm | |
| Brake drum nut (8° + 11° cone) | 161 Nm | |
| Brake drum nut (20° cone) | 203 Nm | |
| Locking brake drum nut | 14-14.7 Nm | |
| Fork left | 54-55 Nm | |
| Front axle nut | 54-55 Nm | |
| Wheel mounting nuts | 19.6-22.5 Nm | |
| Shaft seal retaining plate (ratio contr.) | 4.7-5.2 Nm | |
| Chain guide (ratio contr.) | 4.7-5.2 Nm | |
| Gear spacing (ratio contr.) | 0.07-0.30 Nm |
Torques_Vespa-Largeframe-to-1977| Nm | |
|---|---|
| Nuts housing halves | 12-15 Nm |
| Stator plate bolt | 3-5 Nm |
| Clutch nut | 40-45 Nm (depending on clutch up to 65) |
| PTO shaft nut | 30-35 Nm |
| Gearshift cross (left-hand thread, screw lock) | 15-18 Nm |
| Rotor nut (pole wheel) | 60-65 Nm |
| Carburetor mounting screw | 16-20 Nm |
| Clutch cover screw | 6-8 Nm |
| Exhaust port (P200) | 75-80 Nm |
| Exhaust nut on cylinder | 16-26 Nm |
| Aluminum cylinder (observe manufacturer's instructions) | 14-16 Nm |
| Cylinder head nut (P 125 X, P 150 X, M7) | 16-18 Nm |
| Cylinder head nut (P 200 E, M8) | 20-22 Nm |
| Spark plug (observe manufacturer's specifications) | 20-24 Nm |
| Engine swing arm crosshead bolt | 60-75 Nm |
| Nut for lower shock absorber mounting | M9 = 14-22 Nm, M10 = 16-24 Nm |
| Nut for rim mounting of brake drum (v/h) | 20-22 Nm |
Torques_Vespa-PX| Nm | |
|---|---|
| Nuts housing halves | 12-15 Nm |
| Stator plate bolt | 3-5 Nm |
| Clutch nut | 40-45 Nm (depending on clutch up to 65) |
| PTO shaft nut | 30-35 Nm |
| Gearshift cross (left-hand thread, screw lock) | 15-18 Nm |
| Rotor nut (pole wheel) | 60-65 Nm |
| Carburetor mounting screw | 16-20 Nm |
| Clutch cover screw | 6-8 Nm |
| Exhaust port (P200) | 75-80 Nm |
| Exhaust nut on cylinder | 16-26 Nm |
| Starter motor nut (M8) | 10-15 Nm |
| Starter motor bolt (M6) | 6-8 Nm |
| Aluminum cylinder | 14-16 Nm (see manufacturer's specifications) |
| Cylinder head nut PX 125-150 (M7) | 16-18 Nm |
| Cylinder head nut PX 200, (M8) | 20-22 Nm |
| Spark plug (observe manufacturer's instructions) | 20-24 Nm |
| Engine swingarm crosshead bolt | 60-75 Nm |
| Nut for lower shock absorber mounting | M9 = 14-22 Nm, M10 = 16-24 Nm |
| Nut for wheel mounting v/h brake drum | 20-22 Nm |
Torques_Vespa-Smallframe| V50, PV, ET3 | PK | |
|---|---|---|
| Nuts housing halves | 13-15 Nm | 13-15 Nm |
| Armature plate bolt | 3-5 Nm | 3-5 Nm |
| Screw kick starter | 23-26 Nm | 23-26 Nm |
| Primary gear nut | 50-55 Nm | 50-55 Nm |
| Clutch nut | 40-45 Nm (depending on clutch up to 65/) | 40-45 Nm (depending on clutch up to 65) |
| Bolt for shift fork | 17-22 Nm | |
| Pole wheel/fan wheel nut | M10 = 45-50 Nm, M12 = 60-65 Nm | |
| Intake manifold nut | 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 |
| Brake anchor plate nut | 17-22 Nm | 17-22 Nm |
| Engine swing arm crosshead bolt | 38-50 Nm | |
| Brake drum nut | M14 = 60-100 Nm, M16 = 90-110 Nm | |
| Oil filler and drain plug | 3-5 Nm | |
| Bolt for gearbox fork | 17-22 Nm | |
| Exhaust bolt on engine swingarm | 18-20 Nm | 18-20 Nm |
| Bolt for pick-up | 2-2.5 Nm | 2-2.5 Nm |
| Screw for fan fastening (Dynastarter) | 8-10 Nm | |
| Dynastarter group nut (?) | 60-65 Nm | |
| Aluminum cylinder | 13-18 Nm (see manufacturer's specifications) | 12-18 Nm |
| Cylinder head nut | V50: 14-18 Nm | PK 50: 13-18 Nm |
| Cylinder head nut | PV, ET3: 14-18 Nm | PK 80-125: 13-18 Nm |
| Nut cylinder base | V50: 12-16 Nm | PK 50: 12-16 Nm (not HP) |
| Spark plug (observe manufacturer's instructions) | 14-18 Nm | 18-24 Nm |
| Wheel hub pin nut (under swingarm 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 |
| Speedometer drive ring nut | 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 absorber fixing nut | 20-27 Nm | PK 50: 20-30 Nm PK 80-125: 20-27 Nm |
| Nut of the engine swing arm on the frame | 38-52 Nm | 38-52 Nm |
| Upper race of the upper steering head bearing (or hand-tight up to contact with bearing balls) | 6-7 Nm (check) | 50-60 Nm (check) |
| Upper ring nut for locking the upper steering head bearing (once the tightening torque has been reached, turn the wrench back by approx. 1?4 turns (80- 90°)) | 50-60 Nm (check) | |
| Handlebar bolt | 30-44 Nm | 30-44 Nm |
| Locknut of the upper steering head bearing | 30-40 Nm | |
| Rear wheel axle nut | 90-110 Nm | 90-110 Nm |
| Nuts rims v/h on brake drum | 23-27 Nm | 20-27 Nm |
| Front wheel center nut | 75-90 Nm | PK 50: 50-80 Nm PK 80-125: ? |
*We have worked to the best of our knowledge, but all information is without guarantee.
