BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | ATV/UTV FUEL/AIR SYSTEMS FUEL/AIR SYSTEMS 1336 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. CLAMP-ON AIR FILTERS •Clamps directly to the carburetor intake •Increases airflow to engine to help boost performance •Requires removal of the stock airbox and stock air filter element NOTE: May not be legal for street use. UNIVERSAL CLAMP-ON AIR FILTERS •K&N® universal air filters come in two styles – round straight and round tapered • All clamp directly to the carburetor throat, replacing the stock airbox and filter element •Match the OD of your carb throat with the ID of the filter (given in inches and millimeters) FITS MODEL FILTER STYLE FLANGE POSITION PART # HONDA ATC90 70-78 Tapered 40° angle R-1100 ATC110 82 Tapered 40° angle R-1100 FITS MODEL FILTER STYLE FLANGE POSITION PART # YAMAHA YFZ350 87-05 Round Centered RU-02101 1 Two required. UNIVERSAL ROUND TAPERED TYPE MOUNTING FLANGE ID END CAP SIZE FILTER LENGTH FLANGE POSITION PART # 1 1/8” (29 mm) 2” x 2 1/4” 2 1/2” Centered RC-2540 1 3/8” (35 mm) 2” x 2 1/2” 2 1/4” Centered RC-79 1 9/16” (40 mm) 2” x 3” 3” Centered RC-231 1 11/16” (43 mm) 2” x 3” 2 3/4” Centered RC-107 1 7/8” (48 mm) 2” x 3” 3” Centered RC-109 MOUNTING FLANGE ID END CAP SIZE FILTER LENGTH FLANGE POSITION PART # 1 5/16” (49 mm) 2” x 3” 3” Centered RC-106 2 1/16” (52.5 mm) 2” x 3 1/2” 4” Centered RC-120 2 1/8” (55 mm) 2” x 3” 3” Centered RC-233 2 1/4” (57 mm) 2” x 3 1/2” 4” Centered RC-125 4 1/2” (114 mm) 4 1/2” x 5 7/8” 6” Centered 1011-1053 UNIVERSAL ROUND STRAIGHT TYPE OVERALL DIMENSIONS LENGTH FLANGE POSITION PART # 1 1/16” ID (43 MM) 3” 5” Centered RU-0210 1 3/4” ID (44 MM) 3 1/2” 5” Centered RU-36 1 7/8” ID (48 MM) 3” 4” Angled 10° RU-128 2 1/16” ID (52 MM) 3 1/2” 4” Centered RU-50 2 1/4” ID (57 MM) 3 1/2” 4” Centered RU-60 3 1/2” 6” Centered RU-62 3 1/2” 6” Angled 10° RU-109 3 1/2” 4” Angled 20° RU-170 3 1/2” 5” Angled 20° RU-171 3 1/2” 6” Angled 20° RU-172 2 7/16” ID (62 MM) 3 1/2” 4” Centered RU-80 3 1/2” 5” Centered RU-81 OVERALL DIMENSIONS LENGTH FLANGE POSITION PART # 2 7/16” ID (62 MM) (CONT) 3 1/2” 6” Centered RU-82 3 3/4” 4” Angled 20°/2” lg. RU-175 3 3/4” 5” Angled 20°/2” lg. RU-176 3 3/4” 6” Angled 20°/2” lg. RU-177 2 1/2” ID (63.5 MM) 3 1/2” 4” Angled 5° RB-70 3 1/2” 5” Centered 1011-1583 3 1/2” 6” Centered 1011-0787 2 3/4” ID (70 MM) 4” 5” Angled 10° RU-146 4” 7” Angled 10° RU-148 2 7/8” ID (73 MM) 4” 6” Centered RU-162 3” ID (76 MM) 4 1/2” 4” Angled 5° RB-0900 4 1/2” 5” Angled 5° RB-0910 5” 5” Centered RU-2430 RU-0210 R-1100 RU-177 1011-1053
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