PGO T-rex -does anyone know if this uses a minarelli engine?

just want to know if its a minarelli horisontal egine used in the pgo t-rex if anyone knows? thanks

 

Its a minarelli clone engine i think in them not sure about the horizontal bit though

 

any idea how close the copy is? can get hold of a cylinder from one you see for my yamaha neos.. they look no difference on a picture.. but thats just a picture, thanks for your help