1PC NR200 twin cylinder methanol gasoline engine Bore: 18.00mm Stroke: 17.00mm. RUIFEIYA inline twin-cylinder for 1/10, 1/8 flat track and bigfoot and 1/10 climbing bike Displacement: 8.6cc (2×4.3cc); single ring. Starting power: 12V or 3S lithium battery. Fire head: two-stroke four-stroke applicable.