Piaggio 483537 Starter Pinion – Scooter 50 Piaggio, Vespa, Aprilia, and Gilera (1998-2026)

This is the original Piaggio starter pinion: the helical-toothed steel gear, with the dog clutch on the opposite side, which transmits the thrust of the kick-starter to the engine assembly. It's the part that wears out when the starter grinds, slips or no longer engages. Product code 483537.

✓ Strengths

• Original Piaggio Group spare part – this is code 483537, which the official catalog places at position 19 on the drive pulley diagram.
• Steel, not soft alloy – the helical teeth and the dog clutch teeth are the first surfaces to wear out: here, these are the original equipment parts.
• One code for the entire 50cc range – the same pinion covers Piaggio engines fitted on Piaggio, Vespa, Aprilia, Gilera and Scarabeo models, from the late 1990s to current production.
• Solves grinding starter issues – in most cases, the problem lies here, not in the kick-starter or the toothed sector.
• Direct installation – no adaptations required: simply replace by opening the transmission casing.

Technical specifications

Vehicle compatibility

The list is taken from the official Piaggio and Aprilia spare parts catalog (B2B area). If you have any doubts, send us your scooter's VIN and we will verify the correct code for you.

Who it's perfect for

For those who have a 50cc scooter with a Piaggio engine and the kick-starter has stopped working properly: the kick-starter going down idly, a grinding noise when trying to start, or the pedal springing back without engaging. On these vehicles, the kick-starter becomes important when the battery is weak or the electric start fails, and being without it is a serious problem. It's a workshop repair but an economical one: the part costs little, and it's replaced when the casing is opened anyway for the belt and rollers.

Frequently asked questions

What vehicles does it fit?
The official spare parts catalog indicates code 483537 for the entire 50cc range with Piaggio engines: Piaggio Fly, Free, Liberty, NRG, Sfera, Typhoon, Zip, Diesis, NTT and Skr City; Vespa ET2, ET4, LX, LXV, Primavera, S and Sprint 50; Aprilia Mojito, SR, SR Motard, Sport City ONE and Scarabeo; Gilera DNA, Runner, Stalker and Storm. The table above shows years and versions.

What is the kickstart gear for?
It's the gear that translates the push from the kickstarter lever into engine rotation. When you press the pedal, the toothed sector of the kickstarter shaft engages with this gear, which in turn rotates the crankshaft until ignition occurs. Once started, the engagement disengages, and the gear stops working.

Where exactly is it located on the engine?
It's inside the engine assembly, on the transmission side, behind the belt cover. In the official catalog, it appears on the drive pulley diagram at position 19, along with the half-pulleys, rollers, belt, and flanged nut. So, you access it by removing the transmission cover.

When should it be replaced?
When the kickstart grinds, slips, or freewheels, and when, upon disassembly, you see that the front teeth of the bell are rounded or chipped. This is typical wear for vehicles used a lot in the city and those that remain unused for extended periods with a dead battery, where the kickstarter is the only way to start them.

Are other parts needed with it?
The gear is sold alone. On the same diagram, the catalog also shows the flanged nut M10x1.25 (289519) and the washer (265300), which have separate codes. It's also worth checking the toothed sector of the kickstarter lever: if the gear is damaged, it often has also marked that part.

Is it original or an equivalent?
It is an original Piaggio Group spare part, identified by factory code 483537, not an aftermarket equivalent with a cross-reference. Moon Bike S.r.l. is an authorized Piaggio and Aprilia dealer and ships with an invoice and manufacturer's warranty.