Choosing the right spare part for your scooter or moped is essential to ensure correct installation, optimal performance, and the safety of your vehicle. Here is our complete guide to identifying compatible parts for your 50 to 125cc 2-wheeler.
1. Identify your scooter accurately
Before any search, you must know 5 key pieces of information about your scooter:
| Information | Where to find it |
|---|---|
| Brand (Yamaha, Piaggio, Peugeot, Kymco...) | Logo and vehicle documents |
| Model (Aerox, Zip, Ludix, Agility...) | Vehicle registration certificate |
| Engine size (50, 70, 125 cc) | Registration certificate / engine block |
| Year or model year | Registration certificate |
| Engine type (Minarelli, Piaggio, GY6, Peugeot...) | Marking on the engine block |
? Tip: take a photo of your registration certificate — all this information is on it. Keep it handy during your search.
2. Understanding common engine types
Many scooters share the same engine but under different brands. Knowing the engine type is often more important than the brand of the scooter.
Main 50cc engine families
- Minarelli horizontal AM6: 2-stroke engine fitted to many mopeds (Peugeot XP6, Yamaha DT, Rieju RS2...)
- Minarelli vertical: 2-stroke scooter engine (Yamaha Aerox, Aprilia SR, MBK Nitro, Malaguti F12...)
- Piaggio 2T: Vespa, Piaggio Zip, Typhoon, NRG, Gilera Runner...
- Peugeot Horizontal: Speedfight 1/2/3 (early models), Trekker, Buxy
- Peugeot Vertical: Ludix, Speedfight 4 (depending on version)
- Kymco / SYM 2T
- GY6 139QMB: Chinese 4-stroke engine fitted to many entry-level scooters
Main 125cc engine families
- GY6 152QMI / 157QMJ: the most widespread on Chinese and Asian 125cc 4-stroke scooters
- Piaggio 4T LEADER: Vespa LX, Piaggio Liberty, Fly...
- Honda PCX / SH: specific engines
- Yamaha 4T: X-Max, NMAX...
? This list is not exhaustive — if in doubt about your engine type, contact us with a photo of the engine block.
3. Using our search tools
motorkit.com offers you several ways to find your parts:
Search by vehicle
Use our selector to filter parts by your vehicle:
- Select your brand
- Select your model
- Select your engine size and year
You will then access the list of parts compatible with your configuration.
Search by original reference
If you know the manufacturer reference of the part to replace (visible on the old part or in the workshop manual), type it directly in the site's search bar.
Search by category
Browse by part family: transmission, braking, exhaust, engine, electrical, etc.
Specialised search tools
For certain technical parts, we offer dedicated tools:
- Spark plugs: spark plug selector by vehicle
- Batteries: selector for suitable batteries
- Dell'Orto carburettors: jet calculator and configuration
4. Check compatibility before purchase
On each product page, you will find:
- ✅ The list of compatible vehicles (brand, model, years, engine size)
- ✅ The engine type concerned
- ✅ The equivalent original references
- ✅ The technical specifications (dimensions, material, standards)
⚠️ Always check these points before ordering. A part compatible with a Peugeot Speedfight is not necessarily compatible with all Speedfights (differences between Speedfight 1, 2, 3 and 4).
5. Special cases to know
Chinese scooters and generic brands
Many scooters from Chinese brands (Lifan, Znen, Jonway, Baotian...) use GY6 engines (139QMB in 50cc, 152QMI or 157QMJ in 125cc). If your scooter is fitted with one of these, search by engine type rather than by brand to broaden your options.
Models before/after revision
Some models have undergone major revisions over the years (e.g., Speedfight 1/2/3/4, Vespa PX/LX). A part compatible with one version may not be compatible with the next. Always check the exact year of your vehicle.
Original (OEM) vs aftermarket parts
- Original part (OEM): manufactured for the manufacturer, guaranteed quality, higher price
- Aftermarket part: compatible and compliant, often better value for money
- Performance part (racing/tuning): adapted for engine tuning, to choose according to your project
On each product page, the type of part is clearly indicated.
6. In case of doubt: contact us
If after these checks you are still not sure about compatibility:
? Write to us at support@motorkit.com specifying:
- Brand, model, engine size and year of your scooter
- Chassis number (VIN) indicated on the registration certificate
- Engine type if you know it
- Photo of the engine block or the part to replace (very useful for our team)
- The desired part (motorkit.com reference or precise description)
Our team will respond with a precise recommendation.
⚠️ Important: an exchange or return for compatibility error is longer and more costly than a prior check. Don't hesitate to contact us before ordering if in doubt — it's free and it's our job.
Related questions
- What is our return policy in case of compatibility error?
- How does the warranty on parts work?
- What are the delivery times?