Well,
You are right about Yamaha VR150. Many Thai people use this engine the modify to use as paramotor engine.
No need to modify much, the cost of the engine only 1/3 compare with Europe engine (only engine)
Easy to maintain and very cheap because we can use same part as Yamaha VR motor cycle, example the cost of Piston just 10$-15$.
Normal the ready weight to fly for VR is about 32-40 kg, that heavy but my VR is only 28 kg
I quite happy with this one.
The reason that I am looking for new Europe engine, just because I need to try the real paramotor engine (not modify one), It's look nice, a bit lighter and I think it should more powerful then my one.
Engine price (net cost, buy from dealer in Thailand)
Thor100 2850$
Thor200 3170$
CMAX175 2850$
If you can give me cheaper then this please let me know.
PS.Now I building another VR150 (need to adjust something) I plan to finish it before new year hopefully.
http://www.siamparamotor.com/webboard/vr-t1729.html