MOOSE RACING Piston Kit - 71.95 mm MSE23375B Fatty Shotgun Exhaust System Fitment: Yamaha R1 R1M R1S

Fitment: Yamaha R1 R1M R1S 2015-2023 (Note 2020 + R1 riders can call in the orders to have front 02 sensors added for an extra charge if your tuning cannot remove the 02 sensors)

Offers improved performance and durability off-road riders will appreciate Stainless steel mid pipe and header A United States Forest Service approved spark arrestor comes equipped making it easy to alternate between off-road and closed-course racing

The Rear Axle Alignment Tool is made from ultra-durable Delrin and is used to push your rear axle out and hold your rear brake caliper mount in place while your rear wheel is removed

Kits include one 12-fluid ounce (EU: 354

Adjustable mounting straps

MOOSE RACING Piston Kit - 71.95 mm MSE23375B Fatty Shotgun Exhaust System Fitment: Yamaha R1 R1M R1SGravity cast aluminum alloy with 18% silicon to increase resistance to wear and decrease thermal distortion, thus providing a longer piston life Coated skirts ease break in, decreasing wear and aiding in lubrication Wear resistant piston rings Wrist pins are nitride coated, providing a hardened, wear resistant bearing surface Piston rings are compatible with OEM pistons Piston kits include piston, rings, wrist pin and circlips Replacement rings are