Welcome to the Scooter Vista range of Lambretta Crankcase & Cylinder Parts for LI, SX, TV, DL & GP models.
Whether you're carrying out a complete Lambretta engine rebuild, replacing a worn cylinder, fitting a new piston or simply replacing gaskets, seals and engine hardware, using the correct components is essential for a reliable engine.
Our Lambretta crankcase and cylinder range includes parts for Series 1, Series 2, Series 3, LI, SX, TV, DL and GP models, covering everything from standard replacement components through to performance cylinder kits and engine rebuild parts.
We stock components from specialist manufacturers and suppliers including Scootopia, BGM PRO, MB Scooters, AF Rayspeed, MEC EUR, SKF and other established scooter parts manufacturers.
Whether you're restoring a standard classic Lambretta or building a performance engine, Scooter Vista can help you find the parts you need.
Lambretta Crankcase Parts
The crankcase is the main foundation of the Lambretta engine.
It houses and supports many of the engine's most important components, including the crankshaft, bearings, gearbox and associated seals.
When rebuilding a Lambretta engine, the crankcase should always be inspected carefully for:
- Cracks
- Damage
- Worn bearing seats
- Damaged threads
- Corrosion
- Previous repairs
- Excessive wear
- Damage around the cylinder mounting area
A good crankcase provides the foundation for a reliable engine rebuild.
Lambretta Crankcase Gaskets
Correct gaskets are important when rebuilding a Lambretta engine.
Gaskets provide a seal between mating engine components and help prevent oil and air leaks.
Scooter Vista stocks Lambretta crankcase gasket sets as well as individual engine gaskets for different applications.
Our range includes Scootopia Lambretta LI, SX & TV crankcase gasket sets and multi-gasket sets covering a wider range of LI, SX, TV, DL and GP engines.
Always select the gasket appropriate to the engine and components being fitted.
Lambretta Cylinder Base Gaskets
The cylinder base gasket sits between the crankcase and cylinder barrel.
Its job is to provide a reliable seal between the two components.
Scooter Vista stocks cylinder base gaskets for different Lambretta engine sizes, including 125, 150, 175 and 200 cc applications.
It is important to select the correct gasket for the cylinder and crankcase combination.
The smaller 125/150/175-style engines use the smaller cylinder stud spacing, commonly referred to as the small block, while 200 cc engines use the wider large-block stud spacing.
Lambretta Cylinder Head Gaskets
Depending on the cylinder and head design, the correct sealing arrangement must be used between the cylinder and cylinder head.
When rebuilding an engine, inspect the cylinder head for:
- Damage
- Warping
- Previous machining
- Damaged threads
- Poor sealing surfaces
A cylinder head that does not seal correctly can cause compression loss and other running problems.
Lambretta Cylinder Kits
Replacing the cylinder and piston can transform the performance of an older Lambretta engine.
Scooter Vista stocks both replacement and performance cylinder kits, including products such as the Scootopia 185 barrel and piston kit and BGM PRO RT195 and RT225 Racetour cylinder kits.
Cylinder kits are available for different engine capacities and performance requirements.
When selecting a cylinder kit, consider:
- Engine capacity
- Crankshaft
- Carburettor
- Exhaust
- Ignition
- Gearbox
- Final drive gearing
- Intended use
A cylinder should always be considered as part of the complete engine rather than in isolation.
Lambretta 185 Cylinder Kits
The Scootopia 185 barrel and piston kit provides an upgrade option for Lambretta engines where additional capacity and performance are required.
Cylinder kits such as this can be useful for riders looking for improved:
- Torque
- Acceleration
- Cruising ability
- Overall engine performance
The rest of the engine specification should be considered when choosing the appropriate cylinder.
Lambretta RT Cylinder Kits
For riders building a more performance-focused Lambretta engine, Scooter Vista also stocks BGM PRO RT cylinder kits.
The current collection includes RT195 and RT225 Racetour barrel kits, providing options for higher-performance engine builds.
These types of engines need the supporting components to match the cylinder specification, including:
- Crankshaft
- Carburettor
- Exhaust
- Ignition
- Clutch
- Gearing
Lambretta Cylinder Barrels
The cylinder barrel contains the bore in which the piston travels.
When inspecting a used Lambretta barrel, look for:
- Scoring
- Seizure marks
- Excessive wear
- Damaged ports
- Corrosion
- Cracks
- Incorrect previous machining
A cylinder that appears usable externally may still have significant wear inside the bore.
If you're rebuilding an engine, measure the cylinder and piston rather than relying purely on visual inspection.
Lambretta Pistons
The piston transfers the combustion force into the crankshaft through the connecting rod.
A piston should be inspected for:
- Scuffing
- Seizure marks
- Cracks
- Ring-groove wear
- Damaged crown
- Excessive skirt wear
Piston rings should also be inspected carefully.
If fitting a new cylinder kit, always use the piston and rings supplied or specified for that particular cylinder.
Lambretta Piston Rings
Piston rings provide the seal between the piston and cylinder bore.
Worn or damaged rings can result in:
- Reduced compression
- Poor starting
- Increased smoke
- Loss of performance
- Increased oil consumption
- Blow-by
Scooter Vista stocks replacement piston rings for various Lambretta performance cylinder kits, including components for BGM RT applications.
Always use the correct ring specification for the piston and cylinder.
Cylinder studs secure the cylinder barrel to the crankcase.
The studs need to be in good condition because they are responsible for maintaining the correct clamping force between the cylinder and crankcase.
Inspect studs for:
- Damaged threads
- Corrosion
- Stretching
- Bent studs
- Damaged crankcase threads
When rebuilding an engine, replacing badly corroded or damaged studs can be worthwhile.
The crankcase uses a number of studs and fasteners to secure components.
Scooter Vista stocks various Lambretta engine stud and fixing sets, including M6 mag housing stud, nut and washer sets for Series 1, 2 and 3 LI, SX, TV, DL and GP models.
Using the correct hardware helps ensure that components are securely and correctly mounted.
The mag housing forms an important part of the engine assembly and supports the flywheel and associated ignition components.
Scooter Vista stocks UNI Lambretta mag housings for LI, SX, TV, DL and GP models, covering a wide range of engine capacities and applications.
A mag housing should be inspected for:
- Bearing wear
- Damage
- Cracks
- Damaged threads
- Corrosion
- Poor previous repairs
The mag housing supports the flywheel-side crankshaft bearing.
When rebuilding an engine, the bearing should be inspected for:
- Roughness
- Play
- Noise
- Damage
If the bearing is worn, replace it rather than reusing it during a full engine rebuild.
Scooter Vista also stocks engine bearing sets for Lambretta applications, including SKF options.
Lambretta Engine Bearings
The crankshaft and other rotating components rely on high-quality bearings.
Worn bearings can result in:
- Engine noise
- Crankshaft movement
- Vibration
- Poor running
- Oil seal problems
- Premature engine wear
When carrying out a complete engine rebuild, bearings should be carefully inspected and replaced where necessary.
Oil seals are critical to engine operation.
They prevent engine and gearbox oils from escaping while also helping prevent unwanted air entering the engine where a sealed area is required.
Scooter Vista stocks several Lambretta oil seal options, including:
- Scootopia engine oil seal sets
- MB Scooters E5/E10-resistant oil seal sets
- ROLF oil seal sets
These cover LI, SX, TV, DL and GP applications.
Replacing oil seals during a full engine rebuild is generally sensible, particularly when the existing seals are old.
Lambretta E5 & E10 Resistant Oil Seals
Modern fuels can place additional demands on older rubber components.
Scooter Vista stocks MB Scooters Lambretta LI, SX, TV, DL & GP E5/E10-resistant oil seal sets, providing an option for riders looking to use seals designed with modern fuel compatibility in mind.
When rebuilding an engine, consider the fuel and oil systems as well as the mechanical components.
O rings are used throughout the Lambretta engine to provide seals between components.
A damaged, flattened or hardened O ring can result in leaks or poor sealing.
Scooter Vista stocks various Lambretta LI, SX, TV, DL and GP engine O rings.
When dismantling an engine, inspect every O ring rather than automatically reusing old ones.
Lambretta Sidecase & Crankcase Covers
The sidecase forms part of the engine assembly and provides access to the clutch, chain and gearbox components.
Scooter Vista stocks sidecase components for a range of Lambretta models, including UNI DL/GP sidecase and crankcase cover sets.
When rebuilding the sidecase, inspect:
- Sealing surface
- Studs
- Threads
- Bearings
- Oil seals
- Dowels
- Gasket
A sidecase gasket provides the seal between the sidecase and engine casing.
Scooter Vista stocks several options, including standard Lambretta sidecase gaskets, Scootopia versions, MB Scooters gaskets and BGM PRO silicone sidecase gaskets.
The correct gasket should be selected for the engine and sidecase combination.
Dowels help correctly locate engine components.
Scooter Vista stocks Lambretta LI, SX, TV, DL & GP sidecase dowels, which help ensure correct positioning of the sidecase assembly.
Never rely solely on the studs to locate an engine component where locating dowels are designed to be used.
Lambretta Crankshaft
The crankshaft converts the reciprocating movement of the piston into rotational movement.
During an engine rebuild, inspect the crankshaft for:
- Bearing wear
- Big-end play
- Damage
- Run-out
- Damaged threads
- Wear on the seal surfaces
The correct crankshaft must be selected to match the cylinder and engine specification.
Performance cylinder kits may require a crankshaft with the appropriate stroke, rod length and specification.
Lambretta Cylinder & Crankshaft Compatibility
When upgrading a Lambretta cylinder, don't look only at the cylinder capacity.
The following should all be considered:
Cylinder
Piston
Crankshaft stroke
Connecting rod
Porting
Carburettor
Exhaust
Ignition
Clutch
Gearbox
Final-drive gearing
Changing the cylinder without considering the rest of the engine can produce disappointing results.
Lambretta Small Block & Large Block Cylinders
One of the most important things to check when ordering Lambretta cylinder parts is whether you have a small-block or large-block engine.
Generally, 125, 150 and 175 cc engines use the smaller cylinder stud spacing, while 200 cc engines use the wider large-block spacing.
Scooter Vista's cylinder gasket listings specifically distinguish between the two configurations.
Always check the exact engine and cylinder specification before ordering.
Lambretta Cylinder Porting
Cylinder porting affects the amount of air and fuel mixture that can enter the engine and how efficiently exhaust gases can leave.
Standard cylinders have relatively conservative porting.
Performance cylinders may feature:
- Larger transfer ports
- Larger exhaust ports
- Improved port shapes
- Different timing
- Increased capacity
Porting should be considered alongside the carburettor, exhaust and crankshaft.
Lambretta Cylinder Cooling
Lambretta cylinders rely on airflow to keep operating temperatures under control.
The cylinder cowl directs cooling air around the cylinder.
Scooter Vista stocks cylinder cowls for Lambretta applications, including AF Rayspeed DL/GP-style black cylinder cowls with a widened exhaust slot, designed to accommodate larger exhaust systems.
Correct cooling is particularly important on performance engines.
Never underestimate the importance of correctly fitted cylinder cowling.
Lambretta Cylinder Cowl
The cylinder cowl protects the cylinder and helps direct cooling air around the barrel.
When fitting a performance exhaust, check that there is sufficient clearance between:
- Exhaust
- Cylinder
- Cylinder cowl
- Frame
- Floor area
A cowl that has been incorrectly modified can affect cooling and may also cause clearance problems.
Lambretta Engine Rebuild Parts
A complete Lambretta engine rebuild can require a large number of components.
Depending on the condition and specification of the engine, this may include:
- Crankcase gaskets
- Cylinder base gasket
- Cylinder head gasket
- Cylinder
- Piston
- Piston rings
- Bearings
- Oil seals
- O rings
- Studs
- Nuts
- Washers
- Sidecase gasket
- Sidecase components
- Mag housing
- Mag housing studs
- Crankshaft
- Cylinder cowl
Replacing worn components during the rebuild can help avoid having to dismantle the engine again later.
Lambretta Engine Rebuild – What Should You Check?
Before rebuilding a Lambretta engine, carefully inspect:
Crankcase
- Bearing seats
- Threads
- Cracks
- Stud holes
- Cylinder mounting surface
- Sidecase sealing surface
Cylinder
- Bore
- Ports
- Cooling fins
- Stud holes
- Base surface
Piston
- Crown
- Skirt
- Ring grooves
- Piston pin
- Circlip grooves
Crankshaft
- Big end
- Main bearing surfaces
- Threads
- Run-out
- Seal surfaces
Mag Housing
- Bearing housing
- Threads
- Cracks
- Sealing surfaces
A careful inspection before assembly can save considerable time and expense.
Lambretta Cylinder Seizure
A seized Lambretta cylinder or piston should always be investigated carefully.
Possible causes include:
- Lack of lubrication
- Overheating
- Incorrect piston clearance
- Incorrect mixture
- Ignition timing
- Air leaks
- Incorrect running-in
- Mechanical failure
Simply replacing the piston without identifying the cause can result in another seizure.
Lambretta Engine Air Leaks
Air leaks can cause serious running problems.
Potential leak points include:
- Cylinder base
- Cylinder head
- Crankcase joints
- Intake manifold
- Oil seals
- Engine O rings
A two-stroke engine relies on the crankcase being correctly sealed.
When rebuilding an engine, every sealing surface should be inspected.
Lambretta Cylinder Head Problems
A damaged or incorrectly sealed cylinder head can result in:
- Compression loss
- Starting problems
- Poor running
- Overheating
- Head gasket failure
Check the cylinder head and mating surfaces carefully before assembly.
Where appropriate, check the head for flatness and ensure the correct tightening procedure is followed.
Lambretta Crankcase & Cylinder Parts for Standard Engines
For a standard Lambretta restoration, the priority is normally:
- Correct specification
- Reliable sealing
- Good-quality bearings
- Good-quality oil seals
- Correct gaskets
- Correct cylinder and piston
- Original-style components where required
Keeping the engine close to the original specification can be important for restoration projects.
Lambretta Crankcase & Cylinder Parts for Performance Engines
Performance engines require more consideration.
A larger cylinder can increase:
- Power
- Torque
- RPM
- Heat
- Load on the crankshaft
- Load on the clutch
- Load on the gearbox
This means the supporting components need to be suitable for the intended engine output.
A good performance engine is built as a complete combination rather than simply fitting the biggest cylinder available.
Choosing the Correct Lambretta Cylinder
Before purchasing a cylinder or piston kit, check:
- Model
- Series
- Engine capacity
- Small-block or large-block
- Crankshaft stroke
- Connecting rod
- Cylinder stud spacing
- Exhaust mounting
- Carburettor requirements
- Intended use
For performance kits, also check the manufacturer's recommended supporting components.
Choosing the Correct Lambretta Gasket
Gaskets are not necessarily interchangeable between every engine configuration.
Before ordering, check:
- Engine capacity
- Model
- Series
- Cylinder type
- Stud spacing
- Standard or performance cylinder
For example, Scooter Vista stocks separate cylinder base gasket options for 125/150/175 cc small-block applications and 200 cc large-block applications.
Lambretta Crankcase & Cylinder Parts at Scooter Vista
Whether you're restoring a classic Series 1, Series 2 or Series 3 Lambretta, rebuilding an LI, SX or TV engine, maintaining a DL or GP, or building a performance engine, Scooter Vista stocks a wide range of crankcase and cylinder components.
Our range includes:
- Crankcase components
- Crankcase gaskets
- Sidecase gaskets
- Cylinder base gaskets
- Cylinder head gaskets
- Cylinder kits
- Barrels
- Pistons
- Piston rings
- Cylinder studs
- Engine studs
- Crankshafts
- Engine bearings
- Oil seals
- O rings
- Mag housings
- Mag housing fixings
- Sidecase components
- Cylinder cowls
- Engine rebuild components
We stock parts from specialist manufacturers including Scootopia, BGM PRO, MB Scooters, AF Rayspeed, MEC EUR, SKF and other established scooter parts suppliers.
From a simple gasket replacement to a complete performance engine rebuild, choosing the correct crankcase and cylinder components is essential.
Scooter Vista – Classic Lambretta & Vespa Parts Specialists
Scooter Vista specialises in classic Lambretta and Vespa parts, supplying components for restoration, servicing, engine rebuilding and performance upgrades.
Browse our range of Lambretta LI, SX, TV, DL & GP Crankcase & Cylinder Parts to find the components you need for your next engine rebuild, restoration or performance project.
