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that one is probably the best starting point. I want to reuse all components except crankcase ,that I have to redesign for my use (no gearbox , new provision etc)
I wonder if it's doable as 2 parts...

true. looking at this (HiSun800) , it's very likely the same engine ..
http://img.xooimage.com/files49/8/1/5/800cc-enine-212af93.jpg

I noticed that VTwin seems to be heavier for the power , but...

well ,after looking around again and again found
http://cfmoto.cn/uploads/Englne/fbca6e13-bcf4-489f-b580-bed3d98a83a0.jpg

52 kw .. someone to inform about engine price and net weight?

thanks for this contribution .. but unfortunatly they are 3 and 4 cylinders and ratio power/displacement is not great

Displacement ：1083cc （812cc） 　 　 　 　
Standard Power...

Hello,

For a project I'm looking for a TWIN engine (ideal is flat , but VTwin is ok) , 4 stroke , that can give 75hp max ..
So far the closest I found is this one .....