I just finished the ninja #14109 Kawasaki Ninja ZX-RR and it was a really nice kit with upgrades available for the forks and other details and some fine engineering. I built 14034 - Suzuki GSX750s Katana years ago and it was great.
I just purchased a lot of 3 bikes with riders on ebay and one of the kit is 14001 (the first Tamiya 1/12 motorcycle) - looks really nice. All the same screws, vinly hose etc.
I have their most recent kit - the Ducati 1199 Panigale on order.
Like was said earlier - hard to go wrong with these beautiful kits.