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The Yamaha YZ 400 F (1998–1999) revolutionised modern 4-stroke motocross with its 399 cc single-cylinder engine producing around 55 hp. It prompted all manufacturers to switch from 2-stroke to 4-stroke engines. It weighs approximately 103 kg. The 399 cc capacity of this engine is matched by a range of exhaust systems available from Moto-Sound.
GPR sport exhausts for the Yamaha Yz 400 F 1998/99 are a proven choice for riders seeking quality aftermarket products. GPR is an Italian brand with over 30 years in the sport exhaust sector, built on reliability and one of the widest catalogues in the market.
Installing a sport exhaust on your Yamaha Yz 400 F 1998/99 transforms the riding experience: the sound becomes more sporting and engaging, performance may improve thanks to reduced back pressure, and the bike gains a unique character. The sport exhaust also weighs less than the original, improving agility and reducing heat to the rider.
Looking for a road-legal exhaust? Each product description indicates whether it is approved for road use. Without this indication, the product is racing — track use only.
Most sport exhausts from GPR are produced to order upon receipt of your purchase. Contact us in advance to find out the actual production and delivery times.
Browse the products below to find the right exhaust for your Yamaha Yz 400 F 1998/99.
Do you have a different Yamaha model? Find the right exhaust on the Yamaha exhausts page.
