[culcune]

Actually, as far as spark plugs go, one of your own photos in your intro post tell you what kind of spark plug to get. On the right swingarm, there is a sticker which states "Vehicle emission control information Zongshen Inc" and on there it will tell you what kind of plug your bike needs and the gap to make it. Even if the plug looks ok, it couldn't hurt to start with brand new ones. On my bike, it is VERY easy to get to the plug, but be careful pulling on the spark plug 'boot' since if you break something, a Zongshen replacement might not be as easy to find vs. finding a common Honda or Suzuki.

Is this a single cylinder or a twin cylinder? You might need two spark plugs...