STM Slipper Clutch Honda CBR 1000 RR (2008-2019) FHN-S080

Rooted in decades of Italian racing engineering, the STM slipper clutch for the Honda CBR 1000 RR (2008-2019) represents the kind of precision hardware that separates a street-legal sportsbike from a genuinely track-ready machine. Part number FHN-S080 is a direct-fit replacement that transforms the clutch character of the CBR completely, replacing the factory unit with a system designed to the exacting standards STM have applied to championship-winning machinery for years.

Key Features

• Prevents engine over-rev under hard downshifts, delivering composed, controlled deceleration in place of the unsettling lurch the stock clutch can produce
• Actively reduces rear wheel hop and skip, improving traction and stability precisely when the bike is most vulnerable — deep into a braking zone
• Significantly lowers the risk of a highside by limiting the triggering impulse that causes sudden, violent rear-wheel grip recovery
• Allows a controlled, predictable rear slide — a genuine advantage during aggressive cornering entries and track sessions
• Patented ball-ramp mechanism governs the slipper function with measurable precision, maintaining consistent behaviour across a wide rpm range
• Diaphragm spring replaces the conventional pressure plate, eliminating plate judder and producing a markedly cleaner lever release feel
• Approximate weight saving of 0.7–0.8 kg over the OEM unit by reducing rotating mass, directly benefiting acceleration response and overall handling agility

Design, Finish and Heritage

STM have been crafting slipper clutches in Italy since the technology first migrated from Grand Prix paddocks to production machinery. The FHN-S080 carries that lineage in every detail — from the close-tolerance machining of the basket and hub to the anodised finish that distinguishes it instantly from the grey anonymity of a standard clutch assembly. This is components-as-craft: functional sculpture that earns its place under the fairing on visual merit alone, before you consider what it does for lap times.

The ball-ramp antihopping system is at the heart of STM's design philosophy. Rather than relying on a simple slip mechanism, the patented ramp geometry allows the clutch to modulate lock-up force progressively, matching rear-wheel deceleration to available traction with a finesse that passive systems cannot replicate. The result is a clutch that feels intuitive within a handful of laps, giving the rider the confidence to brake later and harder.

Performance on Road and Track

For CBR 1000 RR owners who regularly use the bike in a sporting context — whether that means track days, circuit racing or spirited road riding — the slipper function addresses one of the fireblade's few remaining dynamic weaknesses. The improved closure-phase control in cornering also prevents the familiar tucking sensation that can arise when the clutch re-engages mid-corner, a detail that matters enormously at pace. Combined with the rotational mass reduction, the overall effect is a bike that steers more keenly, brakes more predictably and accelerates more crisply out of slow corners.

Fitment and Compatibility

The STM FHN-S080 is engineered specifically for the Honda CBR 1000 RR across the full 2008 to 2019 model range. Fitment is direct; no modification to the crankcases or primary drive is required. Always verify your exact model year and variant prior to fitting.

• Honda CBR 1000 RR — 2008
• Honda CBR 1000 RR — 2009
• Honda CBR 1000 RR — 2010
• Honda CBR 1000 RR — 2011
• Honda CBR 1000 RR — 2012
• Honda CBR 1000 RR — 2013
• Honda CBR 1000 RR — 2014
• Honda CBR 1000 RR — 2015
• Honda CBR 1000 RR — 2016
• Honda CBR 1000 RR — 2017
• Honda CBR 1000 RR — 2018
• Honda CBR 1000 RR — 2019

Specifications

• Brand: STM
• Part number: FHN-S080
• Type: Slipper clutch (antihopping clutch)
• Fitment: Honda CBR 1000 RR (2008–2019)
• Antihopping mechanism: Patented ball-ramp system
• Spring type: Diaphragm spring
• Weight saving over OEM: approximately 0.7–0.8 kg
• Origin: Italy