70cc cast iron sports cylinder kit from Polini for scooters with Kymco or SYM vertical (GR1) engine.
The cylinder has a bore of 47mm and, according to the manufacturer, achieves an output of 8.5 hp at 7,800 rpm.
The cylinder has a bore of 47mm and, according to the manufacturer, achieves an output of 8.5 hp at 7,800 rpm.
