What is Exup eliminator?
Description: Graves Motorsports Universal EXUP Eliminator is a simple plug-and-play application that allows the removal of the EXUP valve and motor without setting the “Check Engine light” being activated when using a full racing exhaust.
What is the purpose of a servo buddy?
Servo Buddy allows for a complete elimination of the servo motor, valve & cables. Utilizing the Servo Buddy improves reliability by eliminating issues when the factory servo motor fails.
Do I need a servo buddy?
The Servo Buddy is a must-have when switching to an aftermarket exhaust- and even works great with a factory system if you want to eliminate the servo motor and fix the exhaust valve in the open position. All other models (including the 2019-2020 S1000RR) just need one Servo buddy.
How does servo buddy work?
It works by electrically mimicking the working exhaust servo so the computer thinks all is well with the exhaust circuit preventing the FI light from coming on due to exhaust faults while still keeping the lights other functionality to warn you if anything else is wrong with the bike!
Do you need a servo buddy for slip on exhaust?
The servo buddy is by far the best solution to eliminating the servo motor. Plug in and forget. If you have only installed a slip on exhaust with no other changes you don’t need it.
What does an exhaust servo eliminator do?
About the Exhaust Servo Eliminator This tiny little fella will eliminate the bulky, heavy and space wasting OEM servo motor with the operating cables and wiring, which can save up to 1 kg and frees up a lot of under seat storage. Also, you may now get rid of the exhaust valve too by replacing the exhaust system.
How does Exup valve work?
This is a system that employs a variable EXUP valve in the muffler that can change the configuration of the exhaust duct in a way that controls fluctuations in exhaust pressure at the moments of overlap between the intake and exhaust valves in order to improve intake efficiency, boost power output and improve fuel …
What is the exhaust servo?
What does an exhaust servo motor do? The cables are used to isolate the motor from the hot exhaust and allow it to be placed in a more convenient place on the bike. The purpose of this system according to the motorcycle manufacturers’ marketing departments is to create back-pressure at lower RPM’s to increase torque.
How does a power valve work?
The power valve is a movable flap located on the cylinder exhaust port of a two-stroke engine – where burnt gasses are flushed out of the cylinder. At low RPM, the flap is held partially closed to make the exhaust port smaller. This helps the engine generate torque at low speeds.
What does an exhaust butterfly valve do?
Exhaust butterfly valves are a type of actuator used to silence or reduce noise emitted from certain applications. These valves are commonly associated within the automotive industry, as they will often be found working within cars or motorbikes.
Does a YZ85 have a power valve?
One of the biggest updates on the YZ85 engine is the addition of the YPVS (Yamaha Power Valve System). This is a dual-valve mechanical system. The YPVS begins to open and operate at 8500 rpm and is open fully at 9000 rpm.
What was the purpose of the EXUP valve?
The EXUP system was a four-stroke power valve system, placed in the bottom-end of the exhaust’s downpipes to fool the pipe into thinking it was the best ‘length’ for both mid-range and high-rpm operation. You see, exhaust systems are a compromise.
Where is the exhaust ultimate power valve located?
The Exhaust Ultimate Power Valve (EXUP) alters the back pressure in the exhaust system at various revs. It consists of a gate valve in the EXUP housing, the cast exhaust section immediately behind the headers and below the engine.
How does the EXUP work in a muffler?
Summary of the Mechanism This is a system that employs a variable EXUP valve in the muffler that can change the configuration of the exhaust duct in a way that controls fluctuations in exhaust pressure at the moments of overlap between the intake and exhaust valves in order to improve intake efficiency, boost power output and improve fuel economy.
When did the Yamaha EXUP valve come out?
Fast forward three years and in came the EXUP valve in 1999’s new Yamaha YZF-R6 as well as the previous year’s YZF-R1. Since then the system has been improved and refined and even been seen on the likes of Yamaha’s big cruisers and weird MT-01.