Some of the 2005 Yamaha RS models (those fitted with the three-cylinder 4-stroke 1000) may falsely activate the Throttle Override System (TORS) and indicate an â€œ84â€ error code in the tripmeter/odometer display (along with the warning indicator and engine icon).
We experienced this on our 2005 RS Vector, and a number of Vector owners also reported this occurrence. Yamaha indicates this can be caused by the ignitor unitâ€™s settings not responding correctly to certain normal operating conditions. A mismatch, of sorts. The TORS system can activate when it is not needed, in situations where the throttle operation may be normal. The sled will act like you momentarily hit the kill switch (safety stop switch), where ignition is cut briefly, as the TORS falsely senses faulty throttle operation (TORS compares the position of the throttle at the carbs to the position at the handlebars, and if it detects the throttle is open at the carbs but closed at the handlebars it cuts the ignition).
Yamaha dealers have been instructed to replace the ignitor unit on machines that experience false activation of the TORS system. If your 2005 Yamaha RS model experienced these symptoms, contact your local Yamaha dealer.