lifan 140 cam

Just reassembled Lifan 140 but not sure about the set up for the cam chain and how it goes around the tensioner wheel. Anyone know for sure. It just seems to sit in one spot with a bolt from the outside, can not see how it is adjustable etc. Does chain go either side or over top or both under...

Hey guys, I bought a second hand lifan 140cc engine which didnt come with a cam sprocket cover. The cam sprocket itself looks really small? The one on my genuine thumpstar pro is alot bigger, yet they both have the large sprocket cover? Check these pics and tell me what ya think? Have they...