
The facts.
| Brand | Carbonin |
|---|---|
| Part number | CY20309 |
| Component | Battery tray cover |
| Material | Carbon fibre, prepreg inner skin, autoclave cured |
| Finish | Plane weave, buffed gloss, no clearcoat |
| Works with | CY20300 race seat unit |
| Fitment | Yamaha R9 (2024-2026) |
| Road approval | None supplied — closed-course competition use |
DescriptionThe whole story▼
CY20309 covers the battery bay inside the R9's race tail. It is a small carbon moulding that turns an open compartment with a battery and its terminals in it into a closed one.
Key Features
- Closes the battery compartment within the race seat unit
- Carbon moulding, prepreg inner face, autoclave cured
- Keeps terminals separated from anything that moves behind the rider
- Available separately from the seat unit
- Bare buffed weave, no clearcoat
A Cover With a Safety Job
Battery terminals in an open tail are a genuine hazard rather than an untidiness. Anything metallic that finds its way in — a dropped fastener, a tool left behind during a rushed change, a loose strap buckle — can bridge them, and a lithium pack asked to deliver a dead short does so enthusiastically. Some race regulations require the terminals to be covered for exactly this reason, and even where they do not, it is one of the cheapest pieces of insurance on the bike.
Charging Between Sessions
A race bike's battery gets charged more often than a road bike's, because a machine that spends its day being started, warmed and switched off again never gets a proper charge from the alternator. That makes access a real consideration rather than a theoretical one. The cover is a single fastener away from off, which is what you want when the bike comes back in with twenty minutes before the next session and someone needs to get a charger onto it.
Not in Every Order
This part does not appear on every dealer parts listing for the R9, which is why it is easy to miss when a tail assembly is being ordered. It is worth adding at the same time as the seat unit rather than discovering the gap while the bike is being built.
Fitment
For the Yamaha R9, 2024 to 2026, with the CY20300 race seat unit.
Road Approval
Supplied without approval documentation as part of the racing tail.
Specifications
- Brand: Carbonin
- Part number: CY20309
- Component: Battery tray cover
- Material: Carbon fibre, prepreg inner skin, autoclave cured
- Finish: Plane weave, buffed gloss, no clearcoat
- Works with: CY20300 race seat unit
- Fitment: Yamaha R9 (2024-2026)
- Road approval: None supplied — closed-course competition use
FitmentWhich bikes this fits▼
- Yamaha R9 (2024–2026)
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