Fits all fuel-injected TPI and TBI models. Does not fit 2024 TBI oil-injected models. The all-new VFORCE4X for select GasGas, Husqvarna and KTM TBI fuel injected 125/150/250 and 300cc motorcycles has been designed to offer you exceptional durability and overcome the shortcomings of the stock reed valve system.The VForce reed valve system by Moto Tassinari has been the reed valve system of choice by anyone serious about two-stroke engine performance for the last 25+ years. The simple premise of the VForce reed valve system is to increase engine power and throttle response by increasing the efficiency over a conventional reed valve design by doubling the reed-tip surface.Fits:KTM 150 EXC TPI 2020-2023KTM 250 SX 2023-2024KTM 250 EXC TPI 2018-2023KTM 250 XC 2023-2024KTM 250 XC 2020-2024KTM 300 SX 2023-2024KTM 300 XC 2023-2024KTM 300 EXC TPI 2018-2023KTM 300 XC TPI 2020-2022Husqvarna TC125 2023-2024Husqvarna TC250 2023-2024Husqvarna TE150 2020-2023Husqvarna TE250 2018-2023Husqvarna TE300 2018-2023Husqvarna TX300 2020-2024GAS GAS EX250 2022-2024GAS GAS EX300 2022-2024