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Discussion History

Engine Unit

Assembly

Liquid-cooled parallel-twin around 530 cc with a CVT, frame-mounted so the rear stays light. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Engine Unit parts and their functions

12 top-level parts · 48 parts in total · full bill of materials below
Engine Unit parts diagram: 1 crankcase, 2 cylinder block, 3 piston & rings, 4 crankshaft, 5 cylinder head (DOHC), 6 valvetrain, 7 CVT & final drive, 8 liquid cooling, 9 spark plug, 10 ball bearing, 11 oil seal, 12 o-ring set. 48 parts in 12 top-level items.
Engine Unit parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Crankcase 1×
2 Cylinder Block 1×
3 Piston & Rings 2×
4 Crankshaft 1×
5 Cylinder Head (DOHC) 1×
6 Valvetrain 3 parts 1×
7 CVT & Final Drive 8 parts 1× Belt variator feeding a chain or shaft final drive to the rear wheel.
8 Liquid Cooling 5 parts 1× Radiator and water pump that let the engine cruise hard without overheating.
9 Spark Plug 2× Ignites the air-fuel mixture in a spark-ignition engine.
10 Ball Bearing 4× Deep-groove radial ball bearing.
11 Oil Seal 4× Spring-loaded rotary lip seal that keeps lubricant inside a housing and dirt out where a shaft passes through, sized to DIN 3760.
12 O-Ring Set 1× Set of elastomer rings seated in grooves to seal static or slow-moving joints against fluid and gas, sized to ISO 3601.

3D model

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Build & assembly graph

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Bill of materials for Engine Unit

12 top-level lines · 28 rows shown · 48 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Crankcase maxi-scooter-crankcase 1× 1 · part
2 Cylinder Block maxi-scooter-cylinder-block 1× 1 · part
3 Piston & Rings maxi-scooter-piston-set 2× 2 · part
4 Crankshaft maxi-scooter-crankshaft 1× 1 · part
5 Cylinder Head (DOHC) maxi-scooter-cylinder-head 1× 1 · part
6 Valvetrain 3 parts maxi-scooter-valvetrain 1× 1 11 assembly
6.1 Camshaft maxi-scooter-camshaft 2× 2 · part
6.2 Valve maxi-scooter-valve 8× 8 · part
6.3 Cam Chain maxi-scooter-cam-chain 1× 1 · part
7 CVT & Final Drive 8 parts maxi-scooter-cvt 1× 1 12 assembly
7.1 Drive Variator maxi-scooter-variator 1× 1 · part
7.2 Drive Belt drive-belt 1× 1 · part
7.3 Centrifugal Clutch maxi-scooter-clutch 1× 1 · part
7.4 Driven Pulley maxi-scooter-driven-pulley 1× 1 · part
7.5 Helical Gear Pair gear-pair 2× 2 · part
7.6 Gearbox Housing gearbox-housing 1× 1 · part
7.7 Ball Bearing ball-bearing 3× 3 · part
7.8 Oil Seal oil-seal 2× 2 · part
8 Liquid Cooling 5 parts maxi-scooter-cooling 1× 1 8 assembly
8.1 Radiator maxi-scooter-radiator 1× 1 · part
8.2 Water Pump maxi-scooter-water-pump 1× 1 · part
8.3 Thermostat maxi-scooter-thermostat 1× 1 · part
8.4 Cooling Fan maxi-scooter-cooling-fan 1× 1 · part
8.5 Coolant Hose maxi-scooter-coolant-hose 4× 4 · part
9 Spark Plug spark-plug 2× 2 · part
10 Ball Bearing ball-bearing 4× 4 · part
11 Oil Seal oil-seal 4× 4 · part
12 O-Ring Set oring-set 1× 1 · part

Where the engine unit is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Maxi Scooter

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $500–$50k. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳Weichai Power
weichai.com ↗ 		Weifang, CN Diesel & power engines 50 units 12–16 wks
🇮🇳Cummins India
cumminsindia.com ↗ 		Pune, IN Diesel engines 50 units 12–16 wks
🇨🇳Yuchai
yuchai.com ↗ 		Yulin, CN Diesel engines 50 units 12–16 wks
🇮🇳Kirloskar Oil Engines
koel.co.in ↗ 		Pune, IN Diesel & gas engines 50 units 12–16 wks
🇮🇳Ashok Leyland
ashokleyland.com ↗ 		Chennai, IN Engines & commercial vehicles 50 units 12–16 wks