Oh dear. Is it possible to find out which one it is without disassemble?Yes it's a GRC gp replica called banshee , but would say about 10hp when it has a banshee engine. It could be that it only have the polini replica engine then it has 6,5hp.
No its not a polini clone, the 50cc banshee engine is a zpf clone. The polini clone engine has only 40cc /36mm bore and was mounted in the polini 911 replica with a 14mm sha replica carb.Its 50cc, 40mm bore, 39mm stroke I believe. Its a 50cc Polini clone engine, all the Euro engines have there name cast in the alum parts. I have a basket case I got way back, and rebuilt it and put the whole bike back together. I put a .003" thick base gasket from BZM/Polini 50cc gasket kit, way thinner than the stock one, .020" - .025" or so.
The tweak is the complete crankshaft the big end bearing is also for the dump. Clutchside is not the normal 10mm straight shaft and squish is in the middle of nowhere 😁😁.Ive had 3 polini rep banahee engines still have one now. The weak point is the china piston pin bearing. Replace with real polini and never had a issue. Sold my extra engines complete for $700. All you need is a bzm topend and its bulletproof