斯里兰卡采购需求：机动三轮车、电动三轮车、电动滑板车、新能源汽车、零配件

I'm looking for small scooter or motorcycle engines in the 100-125cc range. Specifically, I'm interested in single-cylinder, 4-stroke, air-cooled models. Could you provide details on your available options, including any specifications, pricing, and lead times? Understanding the performance and reliability of these engines is also essential for our decision-making process. Looking forward to your insights!