I would definitly send the factory motor down the road.They run great,when they run.They are known to fail alot.The only downfall of the Hyundai Clutches is an odd-sized belt(15/16" I think).We had one for a few weeks,I bought it for my Wife,it was fast,and ran/drove nice,but I couldn't even find a belt for it.The deal came up on the G16,so I sold the Hyundai.They are almost a Twin to the G2 Yamaha,I used a rear-body off a G2,but had to cut it in half and widen it about 3/4".Other than that,it actually fit correctly!
