Ultimax - PRO Drive Belt (147-4457U4) Options:147-4457U4 separate compartments to keep gear

separate compartments to keep gear organized

the surface of the tank can also be protected by a protective film or a tank pad

Fits Handlebars diameter of - 22 mm (7/8")

2021 Aprilia RS 660

SYM stock paper filter: 93

Ultimax - PRO Drive Belt (147-4457U4) Options:147-4457U4 separate compartments to keep gearUltimax PRO features a thicker cross section so more surface area contacts the clutch. This means less slippage over a broader speed range for quicker acceleration. The cog design dissipates heat and aids flexibility. A cooler running belt delivers enhanced performance and longer belt life. One Year Warranty. Proudly made in the USA. High Performance Sleds Double cog flexibility Cooler for more power High performance Precise manufacturing Built for