The Tiger 2 flies really nicely with a 40 sized ball bearing engine. I'd be afraid it would lose some of its great flight characteristics with the added wing loading of a 60. Also, you may have trouble slowing it down enough for landing, even with the 60 at idle. Ground clearance for the prop may be another issue with a 60.

I'd say pick up an inexpensive 40 or 46 ball bearing engine. A bushed 46 would probably be ok too.