BSE Z10 zongshen fmm172 4 valves

Hi, i´m from latin america and recently bought a chinese dirt bike. Actually, it came from Russia, but it has a zongshen 250 aircooled 4 valves engine. So far so good, its quite a nice and torquey bike. Fully adjustable suspension front and rear.
I can´t find any info about this engine though. I would like to know how much oil it takes or the valves adjustments, for example.
I would love to meet someone with the same bike and share experiences and tips.
cheers!! Attachment 20384
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