Motorcycle Front Sprocket Gear For Husqvarna 125 150 250 300 350 450 501 Work for Fit For Husqvarna offroad motocross enduro bike front output shaft assembly compatible with 520 drive chain machined splines match drive shaft for direct mounting without or conversion fittings Adopts temperature treated to hardness wear resistance under harsh trail racing conditions Accurate tooth profile avoids chain jump, vibration uneven abrasion to extend chain sprocket life Strict OEM dimensional specifications ensure tight fit with zero loose clearance during speed acceleration