CARBURETTOR 87-22 KTM HUSQVARNA GASGAS KAWASAKI YAMAHA SX EXC TC TE MC KX YZ PWK38S 51531001444

The PWK38S is a Keihin PWK 38S Short Body Quad Vent Air Striker carburettor for high-performance 2-stroke off-road motorcycles, particularly motocross and enduro applications. It is designed to support consistent throttle response and controlled fuel delivery across varied riding conditions, with a short-body layout and universal fitment based on carburettor size rather than a single model-specific application.

Features

• Semi-elliptical section valve improves airflow through the carburettor


• Chromed valve surface reduces wear and supports long-term durability


• Helps maintain high-end RPM performance and reduce engine sluggishness


• Provides rapid throttle response in the first quarter of throttle movement


• Supports enriched carburation at half-throttle for slick dirt or wet conditions


• Optimised fuel use at full throttle helps reduce fuel loss while supporting performance


• Suitable for motocross and enduro use


• Wide range of tuning components available, including needles, jets and valves


• Manufactured to stringent standards for reliability


• Direct OEM replacement


• Universal application based on size and not model-specific


• Product image must be reviewed before ordering to confirm correct fitment


• Designed for straightforward installation; professional installation is recommended if unsure

Specifications

• Model: PWK38S


• Carburettor size: 38 mm


• Type: Keihin PWK 38S Short Body Quad Vent Air Striker carburettor


• Main jet: 168


• Pilot jet: 42


• Needle jet: NVZA


• Throttle valve slide cutaway: 6.5


• Engine-side outside diameter: 46 mm


• Airbox-side outside diameter: 63 mm


• Body length: 75 mm

Cross-Reference OEM Part Numbers

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  51531001444

  
  

Vehicle Fitments

• Husqvarna 250/300 2T: 2017–2019


• Husqvarna/GasGas 125/150 carburetted models: 2017–2022, excluding XC-W TPI and TEi models


• KTM 250 SX: 2020–2022


• Husqvarna TC 250: 2020–2022


• GasGas MC 250: 2022


• KTM 250 EXC: 2017


• Husqvarna TE 250: 2017


• KTM SX 125: 2009–2013


• Kawasaki KX125


• Yamaha YZ125: 2022


• Yamaha YZ125X


• Yamaha YZ250: 1987–2022