The Bestem carbon fiber sprocket cover is a direct-fit upgrade for the Aprilia Tuono 660 (2021–2023), molded from 100% pre-preg Toray carbon fiber and cured in an autoclave. It replaces the stock cover with a twill-weave part that mounts to the factory points — SKU CBAP-RS660-SPC-T.
Does this sprocket cover fit the Aprilia Tuono 660?
Yes. Fitment covers the 2021, 2022, and 2023 Tuono 660. Because the Tuono shares its sprocket-cover mounting with its sibling, the same part also fits the 2021–2023 Aprilia RS 660. It bolts to the factory mounting points — no drilling, trimming, or adapter brackets.
What is the Tuono 660 sprocket cover made from?
Every Bestem part starts as 100% pre-preg Toray carbon fiber — fabric pre-impregnated with a precisely controlled resin content — laid into matched-metal molds and cured under heat and pressure in an autoclave. That aerospace-grade process delivers consistent wall thickness, crisp edges, and repeatable fitment in a way hand-laid, wet-lay construction simply can't match.
This is the same autoclave + 100% pre-preg construction that premium European carbon makers such as Ilmberger built their reputation on — Bestem uses that same technology, plus a superior UV-resistant coating.
Why replace the stock sprocket cover?
- Looks: the front sprocket area sits in plain view on the 660's left side. A twill carbon cover cleans it up and ties in with other carbon pieces on the bike.
- Weight: pre-preg carbon replaces the stock piece at a fraction of the weight — a modest saving, but a real one.
- Durability: the autoclave-cured laminate shrugs off chain lube, road grime, and regular washing without warping or going dull the way aged plastic does.
- Install: a straightforward bolt-on swap with basic hand tools. Most riders have it on in minutes.
Will a carbon fiber sprocket cover turn yellow in the sun?
Sun-ray (UV) yellowing is the single most common defect riders see on carbon fiber parts: the clear coat ambers and clouds over time. A standard clear coat typically begins showing that yellowing after roughly 1,000 hours of UV exposure.
Bestem's proprietary UV-resistant clear coat is rated to approximately 3,000 hours of UV exposure — about three times longer than a standard OEM coating. Because of that coating, every Bestem carbon part carries a lifetime warranty against sun-ray (UV) yellowing.
Why buy from Bestem USA?
Bestem has manufactured carbon fiber since 2005 — over 20 years — and supplies OEM carbon parts to car and motorcycle manufacturers. Bestem carbon is produced in the same state-of-the-art facility that manufactures OEM carbon fiber components for major brands including Polaris and Triumph, using the same aerospace-grade process.
One misconception worth correcting head-on: the idea that Chinese-made carbon is still hand-laid. Wet-lay construction is effectively obsolete for quality structural and aesthetic parts. 100% of Bestem carbon is pre-preg Toray, autoclave-cured in matched-metal molds — quality comes from the process, not the country.
All parts are stocked in Bestem's Atlanta, GA warehouse and ship daily, worldwide, with live phone support every business day. Questions on fitment? Call and a real person picks up.
FAQ
What years of the Tuono 660 does this sprocket cover fit?
The cover fits the 2021, 2022, and 2023 Aprilia Tuono 660. The same part (SKU CBAP-RS660-SPC-T) also fits the 2021–2023 RS 660, since both bikes share the same sprocket-cover mounting.
Is it pre-preg or wet-lay carbon fiber?
100% pre-preg Toray carbon fiber, autoclave-cured in matched-metal molds. No wet-lay, no resin infusion — the same aerospace-grade process used on OEM carbon.
Will the carbon fiber turn yellow in the sun?
Standard clear coats tend to amber after roughly 1,000 hours of UV exposure. Bestem's proprietary UV-resistant coating is rated to about 3,000 hours — three times longer — and the part is backed by a lifetime warranty against UV yellowing.
How hard is it to install?
It's a simple bolt-on swap onto the factory mounting points with basic hand tools. Most riders complete the install in a few minutes.
Where does Bestem ship from?
All parts ship from Bestem's warehouse in Atlanta, GA. Orders go out daily, worldwide, and live phone support is available every business day.