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RS-4D Full Systems The RS-4D builds on the technology that has made the RS-4 a force to be reckoned with on the racetrack, enhancing it's rock solid performance. By increasing the amount of open area at the exhaust outlet, the RS-4D increases airflow, resulting in smoother power delivery and increased throttle control. Preliminary testing has shown that it offers increased horsepower and torque throughout the power curve, especially in the bottom to mid RPM range. Click here for 2010-2012 YZ450F... Click here for 2007-2012 YZ250F... |
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RS-4 Slip-Ons and Full Systems This exhaust was designed with one thing in mind, winning races! The RS-4 is a unique design with predicated power, a side benefit of a quiet earthy exhaust note that speaks volumes for performance. It's an obvious choice for any YZ. Multiple muffler sleeve options available. Click here for 2010-2012 YZ450F... Click here for 2007-2012 YZ250F...
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PIM 2 Engine Managment System Yoshimura has been a leadership company in EFI management for years. By the time all these other guys figure out what we already know - the race will be over. Check out our race proven PIM units. They have a long track record of performance, durability, and ease of use. 2012 Applications Coming Soon... Click here for 10-11 YZ450F... |
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Data Box The optional DATA kit consists of an air fuel sensor and amplifier box that plugs into the PIM2, and allows for self-mapping of the motorcycle. Self-mapping means that as the user rides the bike on a dyno or on a closed course, the DATA Box automatically calculates the required fuel adjustment at each RPM and Throttle Position to reach the user selectable target air fuel ratio. 2012 Applications Coming Soon... Click here for 10-11 YZ450F... |
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Hard Parts Whether you’re racing on a closed course, or blazing the open trail, you want your bike to look and run better than any other. Yoshimura's hard parts line-up includes a variety of pieces that can give your machine the tricked-out look you want, while maintaining the high performance and attention to detail that Yoshimura is known for. These parts are machined from aluminum alloy for high strength and significant weight savings over the stock units. Click here for YZ450F... Click here for YZ250F... |
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