20PCS Carburetor Main Jet Pilot Jet Kit Compatible with PWK Keihin OKO CVK PE PWM, Hex Brass Main Jet #118-160 & Pilot Jet #32-55, for 250cc-400cc ATV Dirt Bike, Replace SCL-2018090001/02/03

Compatibility: Main Jet Slow Pilot Jet Kit Compatible with PWK Keihin OKO CVK KOSO PE PWM Stage-6 Polini caburetors. Fitment: Fit for 250cc-400cc dirt bikes and ATVs Fit for Honda CRF250/450R, CR125R/250R, CR80R Fit for Kawasaki KX250F, KDX200/220/250, KLX250 Fit for Yamaha YZ250F (Stage 1 kit uses #155-#175) Fit for 450 SX-F (uses #146-#155) Carburetor Main Jet: #118 #120 #122 #145 #148 #150 #152 #155 #158 #160. HEX Long Type, Thread pitch: 5x0.8mm, Nut diameter: 6mm, Length: 16.5mm. NOT compatible with: Stock OEM PD18J / PZ19 GY6 factory carburetors. CV / VE series carburetors (use different short round jets). Carburetor Slow Pilot Jets: #32 #35 #38 #40 #42 #45 #48 #50 #52 #55. Thread pitch: 6x0.75mm, Nut diameter: 5mm, Length: 28mm. Replacement Part Numbers: SCL-2018090002-ZH-T-01, SCL-2018090002-ZH-T-02, SCL-2018090001-ZH-T-01, SCL-2018090003-ZH-T-01 Package Include: 10 Pcs Carburetor Main Jets 10 Pcs Slow Pilot Jets

• [Compatibility] Carburetor main jets & slow jets compatible with PWK, Keihin, OKO, CVK, KOSO PE, PWM, Stage-6, Polini, and Motoforce carburetors, ideal for 250cc-400cc dirt bikes, ATVs, and off-road vehicles. Also fits modified CVK/PWK 24-30mm carburetors for GY6 125cc 150cc scooters, NOT for stock OEM PD18J/PZ19 GY6 factory carburetors or CV/VE series. Please verify your original main jet is hex long type (Main: M5x0.8, Pilot: M6x0.75) before ordering
• [Spec & Sizes] Main jet #118, #120, #122, #145, #148, #150, #152, #155, #158, #160 (10 pcs), M5 × 0.8mm, Hex 6mm, Length 16.5mm. This range covers the critical transition zone from 250cc to 400cc — starting where most 125cc kits end, and extending into big bore territory. Pivot jet #32 #35 #38 #40 #42 #45 #48 #50 #52 #55 (10 pcs), M6 x 0.75mm, Nut diameter 5mm, length 28mm
• [Material] Carburetor jets kit for pwk crafted from high-grade solid brass with CNC precision machining. Corrosion-resistant, heat-resistant, with smooth burr-free threads for stable fuel flow and long service life. Each jet is clearly stamped with size numbers for easy identification
• [Function] Jet kit ideal for carburetor rebuilding, engine modification, idle adjustment, and high-altitude riding on mid-displacement off-road bikes. Helps improve throttle response, stabilize idle speed, optimize fuel efficiency, and enhance overall engine performance. Perfectly fits for Honda CRF, CR, Kawasaki KX/KLR, and other 250cc-400cc off-road machines
• [Installation] Replace OEM # SCL-2018090002-ZH-T-01, SCL-2018090002-ZH-T-02, SCL-2018090001-ZH-T-01, SCL-2018090003-ZH-T-01. Professional installation recommended. Start with your current jet size, adjust up/down in small increments (±1-2 sizes), and check spark plug color after tuning