2 products
KTM 790 Duke motorcycle
The KTM 790 Duke reinvented the middleweight naked with an LC8c parallel twin: roughly 790–799 cc of sharp streetfighter character, upright aggression, and a chassis that made “The Scalpel” nickname stick. It is canyon and city focused — not an adventure twin in naked clothes.
Riders search for throttle refinement, exhaust fueling, and kit splits between Evo/Racing (18→24) and Evo2/Racing2 (25→26).
Engine, chassis, and what riders care about
When people look up the 790 Duke engine and chassis, they usually want real-world behavior: throttle response, fueling with common upgrades, and how the motorcycle feels in its intended use. The details below match how this model is listed in our Rapid Bike fitment catalog.
Engine family: LC8c parallel twin (Approx. 799 cc (fitment: 790 cc); fitment listing: 790 cc)
Motorcycle type: Naked / street motorcycle
Strengths: Scalpel-sharp LC8c naked dynamics; Strong twin mid-range for street; Light middleweight streetfighter package
Common rider goals: Cleaner tip-in after exhaust upgrades; Sharper or smoother map strategies; Correct Evo vs Evo2 selection by year
Model years on this page: 2018–2024 (18→24) and 2025–2026 (25→26)
In our Rapid Bike catalog the KTM 790 Duke appears in the following generation window(s): 2018–2024 (18→24) and 2025–2026 (25→26). Even when the marketing name stays the same, wiring looms, connectors, and kit part numbers can change between windows. Always select the year / version pill that matches your motorcycle before choosing a module.
Rapid Bike kits for the KTM 790 Duke
Rapid Bike add-on ECUs install beside the stock ECU. They do not replace the OEM control unit. On a motorcycle like the 790 Duke, that approach is ideal when you want better fueling control, more consistent throttle feel, or additional map options without a full standalone ECU project.
Rapid Bike modules help refine how the motorcycle delivers its power: mixture quality in closed loop, injection map behavior, and on higher kits ignition-related control. That matters when altitude, temperature, load, or aftermarket exhaust / intake setups change demand.
Which Rapid Bike products fit this motorcycle
Years 18→24: Rapid Bike Evo, Racing
Years 25→26: Rapid Bike Evo2, Racing2
After you pick your year range, open the matching kit product and confirm the Item Kit and Wiring codes for your exact window. Add to cart with brand, model, and year selected so the order carries the correct fitment details.
KTM 790 Duke — motorcycle identification
Field | Detail |
|---|---|
Brand | KTM |
Model | 790 Duke |
Also searched as | KTM 790 Duke, Duke 790, LC8c naked twin |
Engine | LC8c parallel twin |
Displacement (nominal) | Approx. 799 cc (fitment: 790 cc) |
Displacement (fitment listing) | 790 cc |
Segment | Naked / street motorcycle |
Year windows in this shop | 18→24 · 25→26 |
Motorcycle technical context for owners and searchers
The KTM 790 Duke is researched for engine character, real-world manners, and generation-specific fitment. Riders typically look for:
Throttle precision: tip-in quality in 1st–3rd gear
Heat soak: city manners vs canyon pace
Bolt-on culture: Dukes frequently run open cans
Year windows: 2018–2024 Evo+Racing; 2025–2026 Evo2+Racing2
Rapid Bike covers 2018–2024 with Evo+Racing and 2025–2026 with Evo2+Racing2 — refining 790 Duke fueling beside the OEM ECU.
Rapid Bike fitment matrix for this model
Year / version | Compatible Rapid Bike products | Notes |
|---|---|---|
18→24 | Evo · Racing | Listed module set for this generation |
25→26 | Evo2 · Racing2 | Listed module set for this generation |
Rapid Bike module details (matched to this motorcycle)
Rapid Bike Evo — injection map management, real-time lambda control, and self-adaptive fueling. The balanced street / travel option where listed.
Rapid Bike Racing — adds ignition advance related control plus engine-brake / limiter-oriented features for more aggressive setups.
Rapid Bike Evo2 — next-generation Evo platform for listed newer year windows: injection map management with adaptive closed-loop support.
Rapid Bike Racing2 — next-generation Racing platform with ignition-oriented control for the listed newer year windows.
Signals and features that matter on this motorcycle
Injection (Inj): multipoint fuel management relative to the stock strategy
Self Adapt: adaptive injection via the stock O2 pathway (module dependent)
O2 modulation: closed-loop mixture quality under changing load
Ignition (Racing): for riders who need more than fueling refinement
Engine brake / limiter related functions (Racing): performance-oriented map strategies where supported
Injection (Inj): next-gen multipoint fuel management vs stock strategy
Self Adapt: adaptive closed-loop behavior on supported Evo2 windows
Ignition (Racing2): ignition-oriented control on newer listed platforms
Engine brake / limiter related functions: where supported by Racing2
Install and validation checklist
Confirm your motorcycle year against the 18→24 / 25→26 pill on this page.
Open the chosen Rapid Bike product and verify Item Kit + Wiring codes for that year window.
Install using the kit manual; keep connectors clean and route the loom away from heat and moving parts.
Validate on a controlled ride: idle, low-gear tip-in, mid-range roll-on, and steady cruise in your typical use.
If you change exhaust, intake, or regularly ride at very different altitudes, reassess maps / adaptive behavior instead of assuming the first setup stays ideal forever.
