Snowmobile Yamaha FX10X, FX10RTX, FX10RTRX, FX10RTRAX, FX10MTX, FX10MTRX, FX10MTRAX. Manual - part 3

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PERIODIC INSPECTION AND ADJUSTMENT

INTRODUCTION

This chapter includes all information necessary to perform recommended inspections and adjustments. These
preventive maintenance procedures, if followed, will ensure more reliable snowmobile operation and a longer
service life. In addition, the need for costly overhaul work will be greatly reduced. This information applies to
snowmobiles already in service as well as new snowmobiles that are being prepared for sale. All service tech-
nicians should be familiar with this entire chapter.

PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM

ITEM

REMARKS

INITIAL

EVERY

1 month or

800 km

(500 mi)

(40 hr)

Seasonally

or 4000 km

(2500 mi)

(200 hr)

Spark plugs

• Check condition.
• Adjust gap and clean.
• Replace if necessary.

∗ Valve clearance

• Check and adjust valve clearance when engine is cold.

Every 40000 km (25000 mi)

∗ Crankcase breather system

• Check breather hose for cracks or damage.
• Replace if necessary.

∗ Fuel filter

• Check condition.
• Replace fuel pump assembly if necessary.

∗ Fuel line

• Check fuel hose for cracks or damage.
• Replace if necessary.

∗ Fuel injection

• Check synchronization.
• Adjust if necessary.

∗ Exhaust system

• Check for leakage.
• Tighten or replace gasket if necessary.

∗ It is recommended that these items be serviced by a Yamaha dealer.

INTRODUCTION/PERIODIC MAINTENANCE CHART FOR

THE EMISSION CONTROL SYSTEM

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GENERAL MAINTENANCE AND LUBRICATION CHART

NOTE:

Brake system:
• After disassembling the master cylinder or caliper cylinder, always change the brake fluid. Regularly check

the brake fluid level and add fluid if necessary.

• Replace the oil seals of the master cylinder and caliper cylinder every two years.
• Replace the brake hose every four years, or if cracked or damaged.

ITEM

REMARKS

INITIAL

EVERY

1 month or

800 km

(500 mi)

(40 hr)

Seasonally

or 4000 km

(2500 mi)

(200 hr)

Engine oil

• Change (warm engine before draining)

∗ Engine oil filter cartridge

• Replace.

Every
20000 km
(12000 mi)

∗ Cooling system

• Check coolant level.
• Air bleed the cooling system if necessary.

∗

Primary and secondary

clutches

• Check engagement and shift speed.
• Adjust if necessary.

Whenever operating elevation

is changed.

• Inspect sheaves for wear and damage.
• Inspect weights/rollers and bushings for wear for primary.
• Inspect ramp shoes/bushings for wear for secondary.
• Replace if necessary.

• Lubricate with specified grease.

∗ Drive chain

• Check chain slack.
• Adjust if necessary.

Initial at 500 km (300 mi) and
every 800 km (500 mi) thereaf-
ter.

∗ Drive chain oil

• Check oil level.

• Change.

∗ Brake and parking brake

• Adjust free play and/or replace pads if necessary.

• Change brake fluid.

See NOTE following this chart.

Control cables

• Make sure that operation is smooth.
• Lubricate if necessary.

∗ Disc brake installation

• Check for slight free play.
• Lubricate shaft with specified grease as required.

Every 1600 km (1000 mi)

∗ Slide runners

• Check for wear and damage.
• Replace if necessary.

∗ Skis and ski runners

• Check for wear and damage.
• Replace if necessary.

∗ Steering system

• Check toe-out.
• Adjust if necessary.

∗ Steering bearings

• Check bearing assemblies for looseness.
• Lubricate with specified grease.

∗ Ski and front suspension

• Lubricate with specified grease.

∗ Suspension component

• Lubricate with specified grease.

Fittings and fasteners

• Make sure that all nuts, bolts and screws are properly tightened.
• Tighten if necessary.

∗ Battery

• Check condition.
• Charge if necessary.

∗ It is recommended that these items be serviced by a Yamaha dealer.

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SPARK PLUGS/FUEL LINE INSPECTION

ENGINE

SPARK PLUGS

1. Remove:

• Left side cover

Refer to “COVERS” in CHAPTER 3.

2. Remove:

• Ignition coils
• Spark plugs

3. Inspect:

• Electrodes 1

Damage/wear

→ Replace the spark plug.

• Insulator color 2

Abnormal color

→ Replace the spark plug

Normal color is medium-to-light tan.

4. Measure:

• Spark plug gap

Out of specification

→ Regap.

Use a wire thickness gauge.

If necessary, clean the spark plugs with a spark
plug cleaner.

Standard spark plug:

NGK CR9E (NGK)

Before installing a spark plug, clean the gasket sur-
face and spark plug surface.

5. Install:

• Spark plugs

NOTE:

Finger-tighten

a the spark plug before torquing b

it to specification.

Spark plug gap:

0.7 ~ 0.8 mm (0.028 ~ 0.031 in)

Spark plug:

13 Nm (1.3 m · kg, 9.4 ft · lb)

FUEL LINE INSPECTION

1. Remove:

• Fuel tank cover

Refer to “SEAT AND FUEL TANK” in CHAP-
TER 5.

2. Inspect:

• Fuel hose 1

Cracks/damage

→ Replace.

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COOLING SYSTEM

Coolant replacement

NOTE:

The coolant should be changed at least every sea-
son.

1. Place the snowmobile on a level surface.
2. Remove:

• Right lower cover

Refer to “COVERS” in CHAPTER 3.

3. Remove:

• Radiator cap 1

WARNING

Do not remove the radiator cap when the engine
is hot. Pressurized scalding hot fluid and steam
may be blown out, which could cause serious
injury. When the engine has cooled, place a
thick rag or a towel over the radiator cap.
Slowly turn the cap counterclockwise until it
stop. This allows any residual pressure to
escape. When the hissing sound has stopped,
press down on the cap while turning it counter-
clockwise to remove it.

4. Place an open container under the thermostat

outlet hose, coolant reservoir hose and, for
FX10MT/FX10MTR/FX10MTRA only, heat
exchanger.

5. Disconnect:

• Thermostat outlet hose 2
• Coolant reservoir hose 3

6. Remove:

• Heat exchanger drain bolt 4

(FX10MT/FX10MTR/FX10MTRA)

7. Drain the coolant.

NOTE:

Lift up the tail of the snowmobile to drain the cool-
ant.

WARNING

Coolant is poisonous. It is harmful or fatal if
swallowed.
• If coolant is swallowed, induce vomiting

immediately and get immediate medical atten-
tion.

• If coolant splashes in your eyes, thoroughly

wash them with water and consult a doctor.

• If coolant splashes on your skin or clothes,

quickly wash it away with soap and water.

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