
The facts.
| Brand | Carbonin |
|---|---|
| Part number | FM2551H |
| Component | Seat foam unit, STANDARD level |
| For seat | H25300AP — Carbonin subframe AL2505H |
| Base | Avio Fibre mounting plate |
| Cover | Neoprene textile, higher grip and durability |
| Embroidery | Carbonin logo |
| Fitment | Honda CBR 600 RR PC69 (2024-2026) |
| Road approval | None supplied — closed-course competition use |
DescriptionThe whole story▼
FM2551H is the middle level for the race-subframe seat: a durable neoprene textile cover with Carbonin embroidery, on the same Avio Fibre plate that carries every foam in the range.
Key Features
- Neoprene textile cover with more grip and more durability than plain neoprene
- Carbonin logo embroidery
- For the H25300AP seat on the AL2505H race subframe
- Shares its mounting plate with all five other PC69 foams
- Not interchangeable with FM2550H, which is the OEM-subframe version
One Plate, Six Products
Every foam in this range — both subframe families, all three levels — is built on the same Avio Fibre mounting plate. That is worth knowing for two reasons. It means a bike can move up or down the range without any other change, so a rider can start on BASIC and step to PROFESSIONAL when they know what they want. And it means the cover is the wear item rather than the unit: when the grip goes off after a couple of seasons, the plate underneath is unaffected and only the covered foam is replaced.
Embroidery Is Not Only Decoration
The Carbonin logo on this level is the visible difference from the BASIC unit, and on a bike carrying sponsor names it does more work than it looks like it does. Photographs from a race weekend end up in front of people who are paying for the bike to be there, and a machine that looks finished — matched bodywork, a proper seat, nothing improvised — reads differently from one that looks assembled from whatever was available. That is a marginal argument for a rider paying their own way and a real one for anyone with a backer.
Stocking for a Season
Teams running more than one bike tend to standardise on this level for exactly that reason. A spare STANDARD foam fits whichever machine needs it, provided both bikes are on the same subframe, and it costs a fraction of holding a spare made-to-measure unit that only suits one rider. Worth deciding before the season rather than during it.
Fitment
For the Honda CBR 600 RR PC69, 2024 to 2026, with the H25300AP seat.
Road Approval
Supplied without approval documentation.
Specifications
- Brand: Carbonin
- Part number: FM2551H
- Component: Seat foam unit, STANDARD level
- For seat: H25300AP — Carbonin subframe AL2505H
- Base: Avio Fibre mounting plate
- Cover: Neoprene textile, higher grip and durability
- Embroidery: Carbonin logo
- Fitment: Honda CBR 600 RR PC69 (2024-2026)
- Road approval: None supplied — closed-course competition use
FitmentWhich bikes this fits▼
- Honda CBR 600 RR PC69 (2024–2026)
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Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.