Yamaha MT09 2021

2021 Yamaha MT-09

The industry benchmark in hyper naked performance and razor sharp handling with its new 890cc, triple cylinder engine and radical next-generation design.

Features may include:

• All-New 890cc Liquid-Cooled 3-Cylinder DOHC Fuel-Injected Engine

The 2021 MT-09 features a newly developed 890cc liquid-cooled 3-cylinder, DOHC, 4-valve-per-cylinder fuel-injected (YCC-T) engine with a downdraft intake. The bore × stroke of 78 mm × 62.1 mm and 11.5:1 compression ratio provide outstanding torque with strong power delivery characteristics. Almost all of the fundamental parts of the engine, from the pistons and connecting rods to the crankshaft, camshafts and crankcase, have all been redesigned with a reduction in weight. The combination of improved combustion efficiency and lighter weight results in an impressive 11% improvement in fuel efficiency as well, from 44 MPG to 49 MPG.

• Eight Pounds Lighter

Weighing in at only 417 pounds, the 2021 MT-09's new engine, chassis and bodywork extensively incorporate weight-reducing technologies, to weigh in 8 pounds lighter than the former MT-09.

• Redesigned Fuel Delivery System

The fuel delivery system has been completely redesigned. On former MT-09s, the fuel injectors were attached directly to the cylinder head, but the fuel injectors of the 2021 MT-09 are now attached to the throttle valve side of the throttle bodies. The injectors now spray at the back of the intake valve heads to promote atomization of the fuel and reduce adhesion of fuel particles to the port walls, producing outstanding combustion efficiency. The throttle valve is operated using the Yamaha Chip Controlled Throttle (YCC-T) electronic system which has been widely proven on YZF series models as well as the earlier MT-09 models.

• Lightweight Forged Pistons

The lightweight forged pistons allow for smooth, high-revving power.

• Fracture-Split Connecting Rods

The forged connecting rods are made using the fracture-split method—where the big-end ring of the connecting rod is purposefully fractured and then reassembled—to ensure an unparalleled degree of manufacturing accuracy. This creates a pair of perfectly matching halves that produce a much more precise mating surface when the rods are bolted together again around the crankshaft.

• New Lightweight Aluminum Frame

The 2021 MT-09 features a newly developed lightweight aluminum frame which has been further refined to showcase the MT's signature “agility.” To ensure both straight-line stability and handling performance, the balance of longitudinal, lateral and torsional rigidity has also been improved. Most notably, the lateral rigidity has been increased by approximately 50% for even more straight-line stability. The all-new frame is manufactured using the latest in Yamaha’s controlled filling (CF) die casting technology which contributes to the 2021 MT-09's reduced weight

• Aluminum Die Cast Subframe

Replacing the steel subframe from the previous model, the 2021 MT-09 employs a controlled filling aluminum die-cast subframe that reduces weight, contributing to the model’s signature feeling of agility.

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