AHL STD 65.5mm Piston Rings for Yamaha YZF-R6 YZF R6 1999 2000 2001 2002 (4 Sets): Automotive. Buy AHL STD 65.5mm Piston Rings for Yamaha YZF-R6 YZF R6 1999 2000 2001 2002 (4 Sets): Piston Rings - ✓ FREE DELIVERY possible on eligible purchases. High quality nodular cast iron material,corrosion-resistant and durable . Effectively sealed gas,improve gas efficiency,to ensure the strong power of engine . Scraping excess oil on the cylinder wall to ensure proper lubrication of the cylinder and piston . To prevent the piston and the cylinder wall in direct contact,to ensure smooth movement of the piston,reduce friction resistance . Quality Assurance!If you are not satisfied with our products,we accept all of the return,replacement or refund requests . Attention:.In order to avoid making troubles to you,please ensure this part fit for your motorbike.Please contact us with any questions regarding the product at any time,especially for the year/brand/model..We will try our best to serve you..Sincere regards to all buyer! . . .