2011 Yamaha YZF-R1 - Yamaha Motorcycles

Here is "2011 Yamaha YZF-R1", actually I have written about it here -> 2011 Yamaha R1, but there is not 2011 Yamaha YZF-R1 but named YZR-R1, i don't know what is difference or just nick name only" so.. here is the YZF-R1 series, as usually, it's taken from trusted yamaha motorcycles official website at yamaha-motor.com. Here is the 2011 Yamaha YZF-R1 specs
Engine
Type 998cc, liquid-cooled 4-