2010 Yamaha Motorsports FX Nytro MTX SE 153 Owners Manual - Page 54

2010 Yamaha Motorsports FX Nytro MTX SE 153 Manual

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Periodic maintenance and adjustment 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) ECS00382 NOTICE Make sure that the spark plug caps are securely installed. Otherwise the spark plug caps could be damaged due to engine vibration. ESU13660 Adjusting the throttle cable free play 1. 2. 3. Slide the rubber cover back. Loosen the locknut. To increase the throttle cable free play, turn the adjusting bolt in direction (a). To decrease the throttle cable free play, turn the adjusting bolt in direction (b). 1 3 (b) 1. Spark plug gap 2. Spark plug reach (a) 2 Before installing any spark plug, measure the electrode 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: 12.5 Nm (1.25 m·kgf, 9.0 ft·lbf) 4 1. 2. 3. 4. Rubber cover Locknut Throttle cable free play adjusting bolt Throttle cable free play Throttle cable free play: 3.0-4.0 mm (0.12-0.16 in) 4. Tighten the locknut. 48

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Periodic maintenance and adjustment
48
is too long, overheating and engine damage
may result. If the reach is too short, spark plug
fouling and poor performance may result. Al-
so, if the reach is too short, carbon will form on
the exposed threads resulting in combustion
chamber hot spots and thread damage. Al-
ways use a spark plug with the specified
reach.
Before installing any spark plug, measure the
electrode gap with a wire thickness gauge
and adjust to specification.
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.
NOTICE
ECS00382
Make sure that the spark plug caps are se-
curely installed. Otherwise the spark plug
caps could be damaged due to engine vi-
bration.
ESU13660
Adjusting the throttle cable free
play
1.
Slide the rubber cover back.
2.
Loosen the locknut.
3.
To increase the throttle cable free play,
turn the adjusting bolt in direction (a). To
decrease the throttle cable free play, turn
the adjusting bolt in direction (b).
4.
Tighten the locknut.
Spark plug reach:
19.0 mm (0.75 in)
1.
Spark plug gap
2.
Spark plug reach
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Spark plug tightening torque:
12.5 Nm (1.25 m·kgf, 9.0 ft·lbf)
1.
Rubber cover
2. Locknut
3.
Throttle cable free play adjusting bolt
4.
Throttle cable free play
Throttle cable free play:
3.0–4.0 mm (0.12–0.16 in)
4
2
(a)
(b)
3
1