Kappa K638 Backrest for Top Case - Foam - Compatible with K466 K355 K4900 K400

The Kappa K638 backrest is an ergonomic cushion made of high-quality foam rubber, covered in fabric, designed to offer comfort and lumbar support to the passenger while riding. It is compatible with Kappa Monolock and Monokey top cases from the K466, K355, K400, and K4900 (K'Vanguard) series. It installs directly on the back of the top case without modifications, adding stable and comfortable support for the passenger.

✓ Strengths

• Foam rubber material – soft, comfortable, and durable over time
• Fabric covering – durable, easy to clean
• Simple installation – attaches directly to the top case without tools
• Ergonomic support – reduces passenger lumbar fatigue on long journeys
• Multiple compatibility – suitable for 9 Kappa top case models
• Compact design – integrates perfectly with the top case profile
• Official Kappa Moto product – brand quality guaranteed

Technical specifications

Top case compatibility

Recommended matching products

• Kappa K466NT Urban Tech Top Case – 46 liters, black, Monolock
• Kappa K4900NN K'Vanguard Top Case – 49 liters, Monokey premium
• Kappa K355N Top Case – 35 liters, black, compact
• Kappa TK756 Inner Bag – for organizing the inside of the top case
• Kappa KSL101 Security Lock Key Kit – additional security

Who is it perfect for

The Kappa K638 backrest is the ideal choice for couples traveling who want to offer their passenger comfortable lumbar support without having to change the top case. Perfect for long-distance touring, city commuting, and anyone who already owns a Kappa top case from the K466, K355, K400, or K4900 series and wants to improve its ergonomics with an original Kappa accessory.