SYM ADX 300
Förster BikesLandgraaf

SYM
ADX 300
Scooter · 278 cc · 28 hp
See typical prices, price changes and important differences.
Below €5,429, the price is low. Above €5,999, the price is high. Check the year, mileage, version and maintenance.
Based on asking prices, not final sale prices.
Based on price data from 6 of the past 12 months.
Used prices have held steady since June 2026.
Quick reference values. Model year, generation and trim can differ.
Models in the same category and price range to consider alongside the ADX 300.
Features and handling differ by generation. Use this overview to find the right version.
Years2021–present
This technical reference row for the ADX 300 combines the available catalogue data: 278 cc, 21 kW, 28 hp, 189 kg. It describes the model reference, but does not necessarily distinguish every production or equipment change. Always verify model year, trim and technical values against the individual motorcycle.
278 cc · 28 hp
The SYM ADX 300 is an adventure maxi-scooter from Taiwanese brand SYM, positioned as a city scooter with a light off-road edge. The engine is a 278 cc water-cooled single with EFI, producing around 28 hp. The steel tube frame combined with a 19-inch front wheel (on the Adventure version) delivers more stability on light unpaved surfaces than standard maxi-scooters. Practicality is a strong suit: under-seat storage and a large instrument cluster are standard.
The ADX 300 targets A2 licence holders who commute daily but enjoy excursions outside the city. Seat height is around 790 mm, slightly taller than a standard maxi-scooter. As an alternative to the Honda X-ADV, Yamaha TMAX and Kymco AK 550 it offers a lower purchase price and a comparable riding profile. The brand has a growing dealer network in Europe.
Check the CVT belt for wear; at higher mileages, belt replacement is a preventive maintenance item.
Inspect the seat lock mechanism for corrosion; the storage compartment draws moisture if the lock does not seal properly.
Check parts availability; SYM has a thinner dealer network than Yamaha or Honda.
Inspect the ABS module for correct operation on models equipped with anti-lock braking.
A used SYM ADX 300 costs €5,999 on average. Most cost €5,429 to €5,999. This is based on 5 motorcycles for sale now.
MotorMonitor now compares 5 used SYM ADX 300 motorcycles from Dutch sales sites.
The average used SYM ADX 300 is from 2026 and has done about 0 km.
The SYM ADX 300 produces 28 hp (21 kW).
The SYM ADX 300 weighs about 189 kg.
The top speed of the SYM ADX 300 is around 135 km/h.
The seat height of the SYM ADX 300 is about 790 mm.