2011 Yamaha Motorsports FX Nytro XTX Owners Manual - Page 57

2011 Yamaha Motorsports FX Nytro XTX Manual

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Periodic maintenance and adjustment 1 Left and right side covers To remove a side cover 1. Remove the shroud. (See above for removal procedures.) 2. Loosen the fasteners, and then remove the side cover as shown. 1. Left side cover 2. 3. Tighten the fasteners. Install the shroud. ECS00372 NOTICE G 2 1 1 G Make sure that all cables, hoses and leads are routed properly before installing the shroud and covers. When installing the shroud and covers, be sure to tighten the fasteners securely. ESU11784 Checking the spark plugs 1 1. Fastener 2. Left side cover To install a side cover 1. Insert the projection on the rear of the side cover into the slot in the fuel tank side cover and insert the projections on the front of the side cover into the slots in the lower cover. The spark plugs are important engine components and are easy to inspect. The condition of the spark plugs can indicate the condition of the engine. Check the coloration on the white porcelain insulator around the center electrode. The ideal coloration at this point is a medium-tolight tan color for a snowmobile that is being ridden normally. If any spark plug shows a distinctly different color, there could be something wrong with the engine. For example, a very white center electrode porcelain color could indicate an intake track air leak or carburetion problem for that cylinder. Do not attempt to diagnose such problems yourself. Instead, take the snowmobile to a Yamaha dealer for inspection and possible repairs. 51

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Periodic maintenance and adjustment
51
Left and right side covers
To remove a side cover
1.
Remove the shroud. (See above for re-
moval procedures.)
2.
Loosen the fasteners, and then remove
the side cover as shown.
To install a side cover
1.
Insert the projection on the rear of the
side cover into the slot in the fuel tank
side cover and insert the projections on
the front of the side cover into the slots in
the lower cover.
2.
Tighten the fasteners.
3.
Install the shroud.
NOTICE
ECS00372
●
Make sure that all cables, hoses and
leads are routed properly before install-
ing the shroud and covers.
●
When installing the shroud and covers,
be sure to tighten the fasteners secure-
ly.
ESU11784
Checking the spark plugs
The spark plugs are important engine compo-
nents and are easy to inspect. The condition
of the spark plugs can indicate the condition of
the engine.
Check the coloration on the white porcelain
insulator around the center electrode. The
ideal coloration at this point is a medium-to-
light tan color for a snowmobile that is being
ridden normally. If any spark plug shows a
distinctly different color, there could be some-
thing wrong with the engine. For example, a
very white center electrode porcelain color
could indicate an intake track air leak or car-
buretion problem for that cylinder. Do not at-
tempt to diagnose such problems yourself.
Instead, take the snowmobile to a Yamaha
dealer for inspection and possible repairs.
1. Fastener
2.
Left side cover
1
2
1
1
1.
Left side cover
1