RDLN Racing Air Filter 38mm | 50cc - 80cc Performance

Boost horsepower, sharpen throttle response, and deliver an aggressive intake growl to your small-displacement powerplant with the premium RDLN 38mm 45-Degree Racing Air Filter Assembly . Engineered as a high-flow performance upgrade for carbureted 50cc 2-stroke and 4-stroke scooters, this open-element intake replaces your restrictive factory plastic air box with a high-CFM pleated filtration matrix. Maximizing the volume of clean oxygen entering your carburetor eliminates intake bottlenecks to optimize fuel vaporization and unlock noticeable mid-to-top-end acceleration. Advanced Performance Features 45-Degree Aggressive Elbow: Angled rubber mounting neck provides necessary clearance around tight rear shock mounts and frame gussets native to small scooter chassis layouts. Removable Weather Protection Cover: Comes equipped with a removable rain shield cap to prevent moisture saturation and road spray from choking your intake during wet-weather riding. High-Flow Pleated Filtration Element: Maximizes surface area to trap destructive fine airborne debris while significantly reducing intake restriction compared to stock foam or paper filters. Heavy-Duty Clamp-On Base: Features a reinforced rubber mounting collar and an adjustable worm-gear hose clamp for an airtight, vibration-proof seal directly onto your carburetor inlet mouth. Comprehensive 50cc Vehicle & Engine Fitment Index This racing filter features a 38mm internal diameter mounting collar (stretches to fit 38mm–39mm intake bells). It is specifically built for the following US-market 50cc carbureted scooters: 1. 50cc 4-Stroke (4T) Carbureted Scooter Layouts Direct fitment for standard 18mm/18.5mm CVK-style carburetors (such as the ubiquitous PD18J) found on liquid-cooled Japanese models and air-cooled imports: Engine Platform / Category Popular US-Distributed 50cc 4T Models Premium Japanese & Taiwanese Honda Ruckus 50 (NPS50), Honda Metropolitan 50 (CHF50, Carbureted Years), KYMCO Agility 50, KYMCO Super 8 50 4T, SYM Mio 50 GY6 50cc Ecosystem (139QMB / 139QMA) TaoTao (ATM50-A1, Pony), Wolf Brand Scooters (RX-50, Islander), IceBear, Bintelli, Chicago Scooter Company (Go.), Lance, Peace Sports, Roketa, Jonway, Vitacci, X-Pro 2. 50cc 2-Stroke (2T) Carbureted Scooter Layouts The perfect open-pod replacement size for 50cc sport-tuned 2-strokes, factory high-output models, or any 2-stroke machine upgraded with an aftermarket 17.5mm to 19mm carburetor configuration (or 70cc Big Bore Kits): Engine Family / Style Popular US-Distributed 50cc 2T Models Minarelli Base (1E40QMB Layouts) Genuine Buddy 50, Genuine RoughHouse 50, E-Ton Beamer 50 / Beamer II / Matrix 50, Keeway Hurricane 50 / Matrix 50 Honda "Dio" Vertical Clone Layouts Honda Elite 50 (SR / S models 1994–2001), Kymco ZX 50 (ZX34/ZX35), SYM DD50 Japanese Sport Classics (With Pod Upgrades) Yamaha Zuma 50 (Pre-2012 "Bug-eye" models), Yamaha Vino 50 (2-Stroke) FITMENT WARNING FOR GY6 125cc / 150cc OWNERS: This 38mm intake generally WILL NOT fit stock 125cc or 150cc carburetors (which require a larger 42mm–43mm intake boot). Please measure your outer carburetor throat diameter before ordering to guarantee a perfect clamp-on match! Technical Sizing Specifications Intake Boot Inner Diameter (ID): 38mm (Fits standard 38mm–39mm carburetor velocity stacks) Neck Alignment Profile: 45-Degree Angular Elbow Bend Filter Housing Dimensions: 5.0" Length x 4.0" Width x 4.0" Height Primary Composition Material: Pleated Synthetic Element with Stainless Support Mesh & Polymer Cap Important: Carburetor Re-Jetting Likely Required Switching from a stock closed airbox to an open high-flow filter significantly increases airflow volume. This will cause your engine to run lean (too much air, not enough fuel), resulting in coughing, sputtering, or potential cylinder damage. You must up-jet your carburetor’s main jet — typically an increase of 5–10 sizes depending on elevation — to properly balance the fuel mixture after installation. Performance upgrades are considered racing parts and are not covered under warranty. For off-road and closed-course competition use only. Not legal for use in California on pollution-controlled vehicles. Check local laws before installing. California Prop 65 Warning: www.P65Warnings.ca.gov SKU: 1300-1112