Features: Brand new, not refurbished or remanufactured, with wear and tear. High-quality field coils ensure quick starting and excellent working condition. Long-term reliable operation inside and outside the motor. Designed specifically for your vehicle's power consumption and quick installation. Color: Silver. Material: Metal. Compatible with: YZF-R1 R1 2004, 2005, 2006, 2007, 2008. Designed to match the original motor in your vehicle or powerplant. The new armature is precision-manufactured and tested for a long service life. Replacement for existing motors requires only one replacement. Professional installation is highly recommended; installation instructions are not included. Specifications: Condition: Aftermarket; Part Type: Direct Replacement; Finish: Heavy Duty; Part: Unit; Unit Type: Number of Teeth: 9; Gear Outer Diameter: 11.6 mm / 0.46 in; Gear Length: 18.8 mm / 0.74 in; Ear 1 Hole: 6.4 mm (Unthreaded); Ear 2 Hole: 6.4 mm (Unthreaded); Replacement Part Numbers: 5VY-81890-00, 5VY-81890-01, 4C8-81890-00, 4C8-81890-01; Package Contents: 1 x Motorcycle Engine (Includes only the above packaging contents, no other products are included). Note: Light reflections and different monitors may cause the color of the item in the picture to vary slightly from the actual item. Measurements may vary by +/- 1-3 cm.