2010 Yamaha Motorsports Apex Owners Manual - Page 17
2010 Yamaha Motorsports Apex Manual
Page 17 highlights
Control functions ESU10292 Main switch The main switch controls the ignition and lighting systems. The various positions are described below. 1 2 3 1. Throttle lever ESU10346 Throttle override system (T.O.R.S.) EWS00041 1. Off 2. On 3. Start WARNING If the T.O.R.S. is activated, make sure that the cause of the malfunction has been corrected and that the engine can be operated without a problem before restarting the engine. Continuing to operate with a malfunction could cause loss of control or damage. If the throttle valves or throttle cable malfunctions during operation, the T.O.R.S. will be activated when the throttle lever is released. The T.O.R.S. is designed to override the fuel injection and limit the engine speed to less than the clutch engagement speed if the throttle valves fail to return to the idle position when the throttle lever is released. (See page 84 for the clutch engagement speed.) Idling Throttle lever Throttle valve T.O.R.S. Released Closed Engine runs properly. Riding Squeezed Open Engine runs properly. Malfunction Released Open T.O.R.S. will be activated. Off The ignition circuit is switched off. The key can be removed only in this position. On The ignition circuit is switched on. Start The starting circuit is switched on. The starter motor cranks the engine. NOTICE: Release the switch immediately after the engine starts. [ECS00021] TIP The headlights and taillight come on after the engine is started. ESU10312 Throttle lever Once the engine is running cleanly, squeezing the throttle lever will increase the engine speed and cause engagement of the drive train. Regulate the speed of the snowmobile by varying the throttle position. Because the throttle is spring-loaded, the snowmobile will decelerate, and the engine will return to idle when it is released. 11