FL250 / FL350 / FL400 SmartCarb SC3 Billet Carburetor

21st-Century Fuel Delivery: The Jetless SmartCarb SC3

Eliminate jetting frustration once and for all. If you are tired of disassembling your carburetor in the staging lanes just because the weather cooled off, or constantly worrying about lean seizures when trail elevations climb, the SmartCarb SC3 brings your vintage Honda into the modern era. Utilizing a patented, single-circuit jetless fuel delivery system, the SmartCarb automatically compensates for changing air density, temperature, and elevation—maintaining ideal air/fuel ratios without swapping brass jets.

Every unit ships pre-jetted and pre-calibrated with baseline settings tailored directly to your engine specs. Experience crisp bottom-end snap, broad midrange torque, cleaner combustion, and genuine set-it-and-forget-it reliability on every ride.

Carburetor Sizing Recommendations

• 36mm SC3: Ideal for stock to mildly modified Honda Odyssey FL350R and Pilot FL400R engines seeking broad torque and crisp low-to-mid powerband response.
• 38mm SC3: The all-around performance choice for ported, pipe-tuned, or aggressive recreational FL350R and FL400R engines.
• 40mm SC3: Built for heavily modified, big-bore, high-RPM race engines and big-dune setups demanding maximum top-end airflow.
• (Note: For FL250 engines, please view our FL250 26mm / 28mm SmartCarb).

Complete Your FL350 Installation: Recommended Matching Components

Because the 36mm, 38mm, and 40mm SmartCarb bodies feature larger spigot and bellmouth dimensions than the stock 32mm OEM carburetor, installing an SC3 onto an FL350R requires matching intake and air-filtration hardware. Most owners choose to order these components together for a complete, hassle-free bolt-on installation:

SmartCarb SC3 installed cleanly using the Oddball ORV Intake & Elbow Adapter Kit.

• Intake Manifold & Elbow Adapter: The FL350 SmartCarb Intake & Airbox Elbow Adapter Kit includes the precision CNC billet aluminum intake manifold, inlet bell adapter with internal flow optimizer, and custom-formed elbow to route airflow cleanly within the chassis frame rails.
• Air Filter Bracket Assembly: Eliminating the bulky factory air cleaner box? Pair your setup with our FL350 High Flow Air Filter Bracket Assembly. It replaces the stock plastic box, dramatically improves engine cooling circulation, and frees up space for fast, unobstructed spark plug and top-end access.
• High-Flow Air Filter: Top off your open-element intake with the matching clamp-on FL350 High Flow K&N Air Filter to supply unchoked airflow and proven filtration in harsh dune and trail environments.

Cockpit Remote Choke Integration

The Honda Odyssey FL350R and Pilot FL400R utilize a dash- or seat-mounted remote choke lever. Selecting the optional Remote Choke assembly allows you to retain this convenient in-cockpit cable functionality. If you opt for the standard manual choke, you will simply pull the choke knob directly on the carburetor body prior to cold starts. (Note: Depending on your exact cable vintage and routing, minor cable barrel adjustment may be needed during installation).

Key Performance Benefits & Features:

• Increased Horsepower: Patented flat-ground metering rod atomizes fuel into ultra-fine droplets, delivering up to a 10% gain in usable power output.
• Unmatched Fuel Economy: Produces 25% to 30% better fuel mileage than conventional slide carburetors, extending your tank range on remote trails.
• Automatic Ambient Density Compensation: Altitude, barometric pressure, and ambient temperature shifts are continually compensated for automatically.
• Tool-Less External Tuning: Dial in your mixture in seconds using the external top-mounted clicker dial—no tools, no disassembly, no spilled fuel.
• Sealed, Internally Vented Float Bowl: Zero raw fuel overflow or spillage over steep dunes, rough whoops, or inverted off-road situations.
• Billet CNC Craftsmanship: 100% precision CNC-machined in the USA from premium billet aircraft aluminum.
• Cleaner Running: Reduces unburned hydrocarbon emissions by 30% to 50% for cleaner exhaust and virtually zero plug fouling.

Optional Throttle Position Sensor (TPS): A factory-integrated TPS option is available for advanced custom engine configurations utilizing 3D programmable ignition curves, electronic power valves, or supplemental data logging.