2017 Honda CBR600RR
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Head of its class
Features may include:
Liquid-cooled DOHC 16-valve 599 cc inline-four engine features oversquare bore and stroke dimensions of 67 mm x 42.5 mm, which contributes to its high-revving, quick-accelerating nature. The lightweight forged-aluminum pistons incorporate special shot peening for added toughness, and oil jets beneath the pistons provide additional friction reduction and cooling.
High-revving engine redlines at 15,000 rpm. The cylinder head features angled valve insets to improve airflow. Two springs per intake valve and one spring per exhaust valve, plus direct shim-under-bucket valve actuation, help to ensure optimum high-rpm valve operation and durability. A double-pivot cam-chain tensioner provides additional durability.
Iridium-tip sparkplugs improve fuel combustion and performance, and a non-resonance knock sensor maintains optimum spark advance while constantly monitoring combustion performance during mid- to high-speed operation.
The Dual Stage Fuel Injection (DSFI) system features 40 mm throttle bodies and two injectors per cylinder — one upper and one lower — controlled by an electronic control system (ECU) that senses rpm and throttle opening. The lower injectors enhance rideability while the upper injectors improve top-end horsepower. A two-stage ram-air system provides a high volume of cool air to the airbox for linear power delivery and incredible engine performance.
Auto-enrichment system is integrated into the programmed fuel-injection (PGM-FI) module, eliminating the need for a manual choke. Denso 12-hole injectors deliver finely atomized fuel mixture for optimum combustion efficiency and power.
The Intake Air Control Valve (IACV) minimizes torque reaction and smoothes response to small throttle changes through gradual reductions of air and fuel intake when the throttle is opened and closed.
Lightweight stainless steel four-into-one exhaust system features an inline-exhaust valve to control exhaust pressure for maximum performance. The routing of the exhaust system beneath the tail section helps to improve lean angle.
The smooth-shifting close-ratio six-speed
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