This carburettor fits all 50cc 2-stroke China scooters with 1P40QM/B engine, as well as many Italo bikes with Minarelli or Morini engines.
If you do not know the optimal nozzle size, screw in a large carburettor nozzle first. If the mixture is too fat (the engine runs unround or "stutters" and the exhaust smokes stronger than usual), take the next smaller nozzle. So you can approach the ideal nozzle size step by step until the mixture reaches the desired consistency.
Technical data:
Motorcycle type: scooter.
Motorcycle brand: Znen
Carburettor with e-choke.
Pre-tuned.
Main nozzle 80.6 mm thread.
Passage 17.5 mm.
Connection air filter side approx. 35 mm.
Connection motor side approx. 24mm
Package includes:
1 x racing carburettor