Windance 16pcs High Precision Carb Main Nozzle, Brass Carburetor Main Jet Kit Fit for GY6 49cc 50cc 80cc 100cc 139QMB 139QMA PZ19 Carburetor with 10 pcs Cleaning Needles Brushes (#40 - #78)

Product Name: High Precision Carb Main Nozzle Category: Main Jet Jet Size: # 40 - 78 Material: Brass, Stainless Steel, Nylon Thread Size: M4 X 0.7mm Features: - Complete Carburetor Primary Jet Kit: The package includes 16 main jet, 5 cleaning needles, and 5 cleaning brushes, all packaged in a small plastic box. Each jet is engraved with a number. The round main jet: #40, #42, #45, #48, #50, #52, #55, #58, #60, #62, #65, #68, #70, #72, #75, #78. - Function: The main jet mainly controls the fuel flow in the main oil circuit and regulates the concentration of the mixture. When your motorcycle emits black smoke from the exhaust pipe, has high fuel consumption, carbon deposits on the spark plug, lacks power, overheats the engine, or backfires, it is possible that the main injector is blocked or damaged and needs to be replaced in a timely manner. - Superior Premium Material: The carburetor high precision jet kit is made of copper, tough and long-lasting, corrosion resistant. CNC lathe processing, smooth surface, accurate size. 5 stainless steel bristles and cleaning needles are made of 304 stainless steel, wire winding, rust, flexible handle, no deformation. High density nylon, good elasticity, no shedding. - Fitment: Aftermarket high speed jet fit for GY6 49cc 50cc 80cc 100cc engine, fit for CVK 139QMB 139QMA PZ19 carburetor. Widely compatible with most Chinese made scooters ATVs and Go Kart, fit for Jonway JMSTAR Roketa, fit for Sunl Taotao Kazuma PEACE. - Easy Installation: Simply turn off the fuel switch, unplug the fuel pipe, remove the carburetor, and remove the float component. Then find the main jet, carefully unscrew the damaged low speed nozzle with a precision screwdriver, and replace it. The Main Jet: - Quantity: 16 pcs - Length: 7mm - Thread: M4 X 0.7mm - Size: 40 / 42 / 45 / 48 / 50 / 52 / 55 / 58 / 60 / 62 / 65 / 68 / 70 / 72 / 75 / 78 Cleaning Brush - Overall Length: 110mm - Brush Length: 30mm - Brush Diameter: 3mm / 4mm / 5mm / 6mm / 7mm - Wire Diameter: 0.5mm / 0.6mm / 0.6mm / 0.7mm / 0.7mm Cleaning Wire Torch Tip - Overall Length: 110mm - Wire Diameter: 0.4mm / 0.5mm / 0.6mm / 0.7mm / 0.8mm Place of Application: - Fit for GY6 49cc 50cc 80cc 100cc engine. - Fit for CVK 139QMB 139QMA PZ19 Carburetor. - Widely compatible with most Chinese made scooters ATVs and Go Kart, fit for Jonway JMSTAR Roketa, fit for Sunl Taotao Kazuma PEACE. Package Include: 16 x Carburetor Main Jet Kit 5 x Cleaning Needles 5 x Brush

• Complete Carburetor Primary Jet Kit: This comprehensive package comes neatly organized in a compact plastic box, containing 16 main jets, 5 cleaning needles, and 5 cleaning brushes. Each main jet is clearly engraved with its respective number for easy identification.
• Functionality: The main jet plays a crucial role in controlling the fuel flow within the main oil circuit, thereby regulating the mixture concentration. If your motorcycle exhibits signs such as black exhaust smoke, excessive fuel consumption, spark plug carbon deposits, lack of power, engine overheating, or backfiring, it may indicate a blocked or damaged main injector that requires prompt replacement.
• Superior Material Quality: Crafted from high-quality copper, the carburetor high-precision jet kit is both tough and durable, with excellent corrosion resistance. The CNC lathe processing ensures a smooth surface and precise dimensions. The 5 stainless steel bristles and cleaning needles, made of 304 stainless steel with wire winding, are rust-resistant, feature flexible handles, and maintain their shape. The high-density nylon components offer good elasticity and do not shed.
• Wide Fitment Range: This aftermarket high-speed jet is designed to fit GY6 engines ranging from 49cc to 100cc, as well as CVK 139QMB, 139QMA, and PZ19 carburetors. It is widely compatible with most Chinese-made scooters, ATVs, and Go Karts
• Easy Installation Process: Installing this kit is straightforward. Simply turn off the fuel switch, disconnect the fuel pipe, remove the carburetor, and detach the float component. Locate the main jet, carefully unscrew the damaged low-speed nozzle using a precision screwdriver, and replace it with the new one.