For 2026, Kappa is deeply renewing its motorcycle accessories range: three new Monolock top cases are arriving — the K'Metrobox KMX400 with 40 liters, the K'Metrobox KMX500 with 50 liters, and the K'Box KB37N with 37 liters — along with two new lines of soft bags, K'Stormer and K'Rugged, and a series of intelligent accessories such as the KS503 compressor-power bank, KS606 heated muffs, and KS121 USB charger. Below you will find all the new products one by one: capacity, dimensions, materials, and for which type of motorcyclist they are intended. They are coming soon to the Kappa Moto catalog at Moon Bike.
Kappa 2026 novelties in brief
Kappa's 2026 collection focuses on three areas. The rigid top cases in the Monolock range are expanding with three models designed for different uses, from city scooters to touring bikes. The soft bags are divided between the new urban and versatile K'Stormer line and the off-road K'Rugged line, dedicated to those who tackle dirt roads and enduro trips. Finally, travel accessories are arriving: a portable compressor that also acts as a power bank, muffs for winter, and a waterproof dual USB charger.
A common thread links almost all products: attention to recycled and certified materials (R-PET linings, fabrics made according to European REACH regulations) and safety details, such as reflective inserts for night visibility.
Monolock Top Cases: K'Metrobox and K'Box
All three new top cases use the Monolock attachment system, Kappa's most popular standard for motorcycles and scooters, and come complete with a mounting plate and universal fitting kit. They also share the Crablock direct pressure closing system: turning the key slightly lifts the lid for quick opening. The release from the plate occurs via an internal knob and only works with the lid open, thus preventing accidental removal.
K'Metrobox KMX400 — the 40-liter city top case
The K'Metrobox KMX400 is the new 40-liter Monolock top case designed for daily commuters who want practicality without sacrificing robustness. It can hold up to two demi-jet helmets (always check the size based on brand and model), has a maximum load of 3 kg, and its dimensions are 43 x 30 x 36 cm. The internal lining is made of orange recycled R-PET, which protects items and keeps them stable while riding.
- 6 technopolymer strap loops
- 40-liter internal capacity, 3 kg maximum load
- Two finishes: KMX400A in natural aluminum, KMX400B painted matte black
- Materials: 1.2 mm natural aluminum, technopolymer for profiles and corners
- Optional accessories: E161K internal elastic net, KS350 straps, K645 backrest
K'Metrobox KMX500 — 50 liters for those who carry more
The K'Metrobox KMX500 is the larger version: 50 liters, dimensions 43 x 35 x 36 cm, and the same structure as the KMX400, with Crablock quick-release and internal lining in recycled R-PET. It's the right choice if you often travel with a passenger or need extra space for helmets, gloves, and some luggage. Both KMX500A natural aluminum and KMX500B matte black finishes are available, always with Monolock plate and fitting kit included.
K'Box KB37N — compact for scooters and light motorcycles
The K'Box KB37N is the most compact Monolock top case in the new range: 37 liters, dimensions H 31 x W 40 x D 40 cm, built from technopolymer to remain lightweight. It is designed for scooters and light motorcycles, for both urban and touring use, and can hold a modular helmet (always check based on the model). It comes standard with reflective stickers for better visibility in low light, in addition to the Monolock plate and universal kit.
Technical specifications comparison
| Model | Capacity | Dimensions | Helmets | Material | Ideal for |
|---|---|---|---|---|---|
| K'Box KB37N | 37 liters | 31 x 40 x 40 cm | 1 modular* | Technopolymer | Scooters and light motorcycles, urban use |
| K'Metrobox KMX400 | 40 liters | 43 x 30 x 36 cm | 2 demi-jet* | 1.2 mm Aluminum | Daily and city use |
| K'Metrobox KMX500 | 50 liters | 43 x 35 x 36 cm | 2 demi-jet* | 1.2 mm Aluminum | Touring and two-up use |
*Helmet compatibility always depends on brand and model: check measurements before purchasing.
Soft bags: K'Stormer and K'Rugged
Alongside the rigid top cases, Kappa introduces two lines of soft bags designed for opposite needs: the versatile everyday use of K'Stormer and the off-road adventure of K'Rugged.
K'Stormer — versatile for city and touring
The new K'Stormer line is made of UV-resistant POLY 600D fabric, with highly visible 3M reflective inserts. It's a comprehensive range that covers almost every transport need:
- STO101 — small 3-liter tank or seat bag, quick-release compatible with Seatlock and Tanklock, with cable port for charging devices
- STO102 — pair of expandable side bags from 23 to 30 liters each, with internal reinforcements in polypropylene and EVA
- STO103 — 10-liter tank bag with touch screen cellphone pocket and Tanklock attachment
- STO104 — 35-liter seat bag with straps and double D-Rings, with a technical and outdoor design
- STO105 — 1-liter leg bag with reflective strips
K'Rugged — the line for off-road
The K'Rugged range is dedicated to enduro and off-road enthusiasts, featuring technical materials like Hypalon and 1680D polyester and the modular M.O.L.L.E. system. Among the new products: the AV00B system, a complete restyling of the modular bag that can be mounted without drilling the bodywork; the AV08 5-liter tank bag with a removable water-resistant internal bag and Tanklock attachment; the AV09 3-liter bag with heat-sealed lining; and the AVSH accessory, the water-resistant smartphone holder that attaches to the M.O.L.L.E. system of the tank bags.
The offer is completed by the new internal bags to optimize aluminum panniers: TK769 54-liter for top cases and TK770 35-liter for side cases, both with roll-top closure, plus the fabric versions TK755B (33 liters) and TK756B (45 liters).
Smart accessories 2026
Perhaps the most interesting part for travelers is the technical accessories, three products that solve concrete problems.
Compressor and power bank KS503
The KS503 is a battery-powered compressor that also functions as a power bank and emergency flashlight. It charges via USB or directly from the motorcycle battery, has an LCD display with pressure indicator, and a 4000 mAh battery. It inflates up to a maximum of 10 BAR (150 PSI), weighs 450 grams, and operates from -20 °C to 60 °C. It comes with a USB-C cable, cigarette lighter cable, hose with American valve, and adapters for French valves, balls, and inflatables. It's the accessory to keep in the top case so you never get stranded with a flat tire.
K'Thermogrip KS606 heated muffs
The KS606 K'Thermogrip muffs are universal for motorcycles and scooters and serve to keep hands warm in winter without losing sensitivity on the controls. They are water-repellent on the outside, made of Poly 600D and neoprene, with soft internal padding and reflective inserts. They mount in seconds on the mirrors, without tools.
USB charger KS121
The KS121 is a dual handlebar USB charger, compatible with tubulars from 22 to 25.4 mm. It offers a 30W USB-C port and an 18W USB-A port to charge two devices simultaneously even while riding, with an IP67 water resistance rating and multiple electronic protections (overvoltage, short circuit, reverse polarity, overheating).
Which Kappa 2026 novelty to choose
If you ride in the city or use a scooter
The 37-liter K'Box KB37N is the simplest choice: lightweight, compact, and suitable for scooters and small motorcycles. If you need more space for two helmets, the 40-liter K'Metrobox KMX400 is the right compromise between capacity and size. For daily commuters, combining the top case with the KS121 charger is an immediate convenience.
If you travel or ride two-up
Opt for the 50-liter K'Metrobox KMX500, perhaps alongside K'Stormer bags to increase carrying capacity. The KS503 compressor under the seat is a useful assurance on long journeys.
If you go off-road or enduro
The K'Rugged line is designed specifically for you: modular bags that mount without drilling the motorcycle, durable materials, and the AVSH smartphone holder to keep your navigator always in sight.
Frequently asked questions
When will the Kappa 2026 novelties arrive at Moon Bike?
Products from the Kappa 2026 collection are gradually entering the Moon Bike catalog. If you are looking for a specific model and do not yet find it online, please write to us: we will immediately tell you availability times and notify you as soon as it arrives.
What is the difference between K'Metrobox KMX400 and KMX500?
The main difference is capacity: the KMX400 has 40 liters (43 x 30 x 36 cm), while the KMX500 has 50 liters (43 x 35 x 36 cm). Both can hold up to 3 kg, accommodate two demi-jet helmets, and use the same Monolock system with Crablock release. Choose the 500 if you often travel two-up or need extra space.
How many helmets fit in the Kappa 2026 top cases?
The K'Box KB37N can hold one modular helmet, while the K'Metrobox KMX400 and KMX500 can hold two demi-jet helmets. Compatibility always depends on the helmet's size and shape: if in doubt, it is advisable to check the measurements or ask us.
Are the Kappa 2026 top cases compatible with my motorcycle?
The top cases use the Monolock system and come with a plate and universal kit, but an application-specific fitting kit might be needed for your motorcycle. Tell us the make, model, and year of your vehicle, and we'll tell you the correct combination.
What is Kappa's Monolock system?
Monolock is Kappa's attachment standard for top cases and panniers on motorcycles and scooters: the case attaches to a dedicated plate and can be removed quickly and securely. It is one of the most widespread systems on the market, which makes it easy to find compatible fittings for many models.
How much do the Kappa 2026 novelties cost?
Prices for the 2026 collection are determined as products enter the catalog. For an updated quote on a specific model, contact the Moon Bike team: we will provide you with real prices and availability.
Where to buy the Kappa 2026 novelties
The Kappa 2026 novelties are arriving in the Kappa Moto catalog at Moon Bike. As an official Piaggio Group dealer based in Naples, Moon Bike assists motorcyclists in choosing the right product, from scooter top cases to enduro travel bags. For official details on the range, you can also consult the manufacturer's website kappamoto.com.
Do you have doubts about the right capacity or compatibility with your motorcycle? Write to us on WhatsApp at +39 392 456 1248 or call us at 081 341 6300 — the Moon Bike team will help you choose the right product. You can also write to us at info@moonbikesrl.it.