2011 Yamaha Motorsports FX Nytro RTX Owners Manual - Page 58
2011 Yamaha Motorsports FX Nytro RTX Manual
Page 58 highlights
Periodic maintenance and adjustment You should periodically remove and inspect the spark plugs because heat and deposits will cause any spark plug to slowly break down and erode. Consult a Yamaha dealer before changing to a different type of spark plug. Specified spark plug: Manufacturer: NGK Model: CR9E EWS00710 1. Spark plug gap 2. Spark plug reach WARNING Be sure to use the specified spark plug and spark plug cap. Otherwise, the T.O.R.S. may not work properly. Spark plugs are produced in several different thread lengths. The thread length or reach is the distance from the spark plug gasket seat to the end of the threaded portion. If the reach is too long, overheating and engine damage may result. If the reach is too short, spark plug fouling and poor performance may result. Also, if the reach is too short, carbon will form on the exposed threads resulting in combustion chamber hot spots and thread damage. Always use a spark plug with the specified reach. Spark plug reach: 19.0 mm (0.75 in) Before installing any spark plug, measure the spark plug gap with a wire thickness gauge and adjust to specification. Spark plug gap: 0.7-0.8 mm (0.028-0.031 in) When installing the spark plug, always clean the gasket surface. Wipe off any grime from the threads and tighten the spark plug to the specified torque. Spark plug tightening torque: 13 Nm (1.3 m·kgf, 9.4 ft·lbf) ECS00382 NOTICE Make sure that the spark plug caps are securely installed. Otherwise the spark plug caps could be damaged due to engine vibration. ESU13662 Adjusting the throttle lever free play 1. 2. 3. Slide the rubber cover back. Loosen the locknut. To increase the throttle lever free play, turn the adjusting nut in direction (a). To decrease the throttle lever free play, turn the adjusting nut in direction (b). 52