Jan 21, 2015 · Hi i'm new here and i have a Loncin 250cc motor and i don't know how to change or check the engine oil,how much oil should be in there and how can i check the gearbox oil and where is the filler plug, how much oil should be in there one other thing i'm curious to know about i have a little hole on my gearbox cover and i think all the gearbox oil leaked out and i need to know what type of oil ... Loncin Atv Engine Alibaba.com offers 1,687 loncin atv engine products. About 0% of these are Motorcycle Engine Assembly, 8% are ATV/UTV Parts & Accessories, and 15% are ATVs. A wide variety of loncin atv engine options are available to you, such as cold style, start, and transmission type. loncin atv engine, loncin atv engine Suppliers and ...