HERE WE HAVE A GENUINE YAMAHA YZF R1 4XV 5JJ REAR BEMBO BRAKE MASTER CYLINDER REMOVED FROM A BIKE WITH ONLY 7K MILES SO IS IN TIP TOP SHAPE AND WILL FIT FROM 1998-2001 ASWELL AS OTHER YEARS BUT PLEASE CHECK IMAGES AND PART NO. FOR EXACT FITMENT PART NO.4XV 5JJ PLEASE DON,T HESITATE TO CONTACT US WITH ANY QUESTIONS WE ARE HERE TO HELP