1.Designed for superior fit, performance and durability.Please refer to the description for specific models. 2.These high-performance belts provide maximum power-transmission and superior clutch/variator torque-multiplier response. 3. Without clutch recalibration – Matches belt shift curves and pulley speed ratios with minimal slip under extreme-torque conditions.-Professional install will be highly recommend.Installation instruction not included 4.Zero clutch/variator spring or fly-weight adjustment required at installation.Tuned your CVT system to get more performance from your machine. 7.Rounded inner cog construction increases belt flexibility and improves clutch pulley intake and out-feed for smoother CVT operation. Product Description Drive Belt Transmission Belt For Aprilia 125 200 Sportcity/Scarabeo Piaggio X10 125 Beverly/Carnaby 2003-2011 FEATURES: -Rounded inner cog construction increases belt flexibility and improves clutch pulley