Sport Demons are great tyres, I've got them on my BMW K100RS and my Harley XLH1200, and put some on my Yamaha FJ1200 and Honda CX500 Custom before I sold them.
It's always an easy trap to sing the benefits of a new tyre after riding a bike with crappy old tyres, then replacing them with soft new rubber, but the Sport Demons do inspire confidence, for sure. Cheers, Terry. 
You sold the big Yam 'XJ' ?
G'Day mate, sorry I didn't reply earlier, I thought I had, but there you go, I'm losing my marbles. Actually I donated the FJ1200 and my "Big Wang" GL1200 to charity last year, and replaced them with a 2001 Yamaha FJR1300.
I paid $2K AUD for it, ($1500 USD) and it has been a brilliant bike, it's the highest mileage bike I've ever owned (145,000 miles) but has never been crashed or abused, and the previous owner (who'd ridden most of those miles) was absolutely fastidious with his maintenance regime, to the point where he was still using original Yamaha filters and oil, which he changed every 6000 miles. I've done around 3000 miles since I bought it, including a couple of 900 mile weekends, and it'll still do 150 MPH with a little left over.
It's got all the best parts that I loved so much with the FJ1200 and the big Goldwing, and with fuel injection, will return 50 miles per (imperial) gallon. I have to thin the herd, I've still got 13 bikes and no room for 9 of them, but I'm in no rush to sell the big Yam. Cheers, Terry.
