MBRP 1985-90 Yamaha YFM 200/225 Moto-4 Direct Replacement Slip-On Exhaust w/Utility MufflerMBRP 1985 90 Yamaha YFM 200 225 Moto 4 Direct Replacement Slip On Exhaust w Utility Muffler Performance Sound In A Simple Package Directly replace your OEM muffler with an MBRP Utility Series exhaust, and hear the voice your ATV or SXS should have had from the factory. ATV Exhaust System With Utility Muffler; Slip On; Direct Replacement; 1. 25 in. Inlet; 3. 5 in. Diameter Body; Chambered Muffler; Chambered Muffler. Fitment: Yamaha YFM200 Moto 4 Base