I loved the Scorpa I had, it was nice and smooth at the bottom end so it grips well, and it goes like f**k when revved to,you have the best of both and I got on with mine brilliant.
And the Yamaha engine is definently reliable to doesnt matter if you thrash it or not still started first time the next time you got it out the shed.
And unlike the GasGas I have now, it is built very strongly