Original sentence: Both models have a front disc break and rear drum break.The 49cc version is limited to 31mph (50kmh), but once derestricted, it can reach 40-45mph.The Sym Jet Euro X is a moped/scooter available in a 49cc 2-stroke engine and a 101cc 2-stroke engine.The seat compartment can fit a full size helmet
Edited sentence: Both models have a front disc brake and rear drum brake.The 49 cc version is limited to 31 mph (50 kmh), but once derestricted, it can reach 40–45 mph.The Sym Jet Euro X is a moped–scooter available in a 49 cc two-stroke engine and a 101 cc two-stroke engine.The seat compartment can fit a full-size helmet