2009 YAMAHA YFM90R oil filter

Cleaning the spark arrester ...................... 8-19
Adjusting the carburetor ........................... 8-20
Adjusting the engine idling speed ............ 8-20
Checking the throttle cable free play ....... 8-21
Timing chain ............................................ 8-22
Valve clearance ....................................... 8-22
Checking the front brake shoes................ 8-22
Adjusting the front brake lever free play ....................................................... 8-23
Checking the rear brake pads ................. 8-25
Checking the brake fluid level ................. 8-25
Changing the rear brake fluid .................. 8-26
Checking the rear brake lever free play ........................................................8-26
Checking and lubricating the cables........ 8-27
Checking and lubricating the front and rear brake levers............................... 8-27
Checking the wheel hub bearings ............ 8-28
Battery ..................................................... 8-28
Replacing the fuse ................................... 8-30
Removing a wheel ................................... 8-32
Installing a wheel ..................................... 8-33
Troubleshooting ....................................... 8-34
Troubleshooting chart .............................. 8-35
RIDING YOUR ATV ...................................... 7-1
GETTING TO KNOW YOUR ATV...............7-2
RIDE WITH CARE AND GOOD JUDGEMENT ............................................ 7-2
BE CAREFUL WHERE YOU RIDE...........7-11
TURNING YOUR ATV..............................7-15
CLIMBING UPHILL....................................7-17
RIDING DOWNHILL..................................7-20
CROSSING A SLOPE................................7-21
CROSSING THROUGH SHALLOW WATER ................................................... 7-22
RIDING OVER ROUGH TERRAIN...........7-24
SLIDING AND SKIDDING.........................7-25
WHAT TO DO IF.......................................7-26
WHAT TO DO... ........................................ 7-26
PERIODIC MAINTENANCE AND MINOR
REPAIR..........................................................8-1 Owner’s manual and tool kit ...................... 8-1
Periodic maintenance chart for the emission control system .......................... 8-3
General maintenance and lubrication chart ........................................................ 8-5

Checking the spark plug ............................. 8-9
Engine oil ................................................. 8-11
Final transmission oil ................................ 8-14
Cleaning the air filter element .................. 8-15 CLEANING AND STORAGE.........................9-1
Cleaning ..................................................... 9-1
Storage ...................................................... 9-2 Brakes ..................................................... 8-22

8-12
4. Insert the dipstick into the filler hole (withoutscrewing it in), and then remove it again to
check the oil level.TIPThe engine oil should be between the minimumand maximum level marks.
5. If the engine oil is at or below the minimum level mark, add sufficient oil of the recom-
mended type to raise it to the correct level.
6. Insert the dipstick into the oil filler hole, and then tighten the engine oil filler cap.1. Maximum level mark
2. Minimum level mark
1
2
8
To change the engine oil 1. Place the ATV on a level surface.
2. Start the engine, warm it up for several min- utes, and then turn it off.
3. Place an oil pan under the engine to collect the used oil.
4. Remove the engine oil filler cap, and then remove the engine oil drain bolt to drain the
oil from the crankcase.
5. Check the washer for damage and replace it if necessary.
6. Install the engine oil drain bolt, and then tighten it to the specified torque.
1
2
3
4
1. Engine oil drain bolt
2. O-ring
3. Spring
4. Oil filter element

8-15
8
Tightening torque:Final transmission oil drain bolt:15 Nm (1.5 m·kgf, 10.8 ft·lbf)5. Add the specified amount of the recommend- ed final transmission oil, and then check the
oil level.N O T I C E Be sure no foreign material enters the final
transmission case.
6. Install and tighten the oil filler cap.
7. Check the final transmission case for oil leakage. If oil is leaking, check for the cause.
Recommended final transmission oil:
See page 10-1.
Oil quantity: 0.30 L (0.32 US qt) (0.27 Imp.qt)
Cleaning the air filter element The air filter element should be cleaned at the in-
tervals specified in the periodic maintenance and
lubrication chart. Clean the air filter element more
frequently if you are riding in unusually wet or dusty
areas.TIPThere are check hoses at the bottom of the air filter
case. If dust or water collects in these hoses, empty1. Air filter case check hose (left)
1
them and clean the air filter element and air filter
case.

8-18
6. Apply Yamaha foam air filter oil or other qual-ity foam air filter oil to the sponge material.TIPThe sponge material should be wet but not drip-ping.
7. Install the sponge material onto the air filter element holder.
8. Place the air filter element in the original position, and then install the screw.
9. Install the air filter case cover by installing the bolts.TIPThe air filter element should be cleaned every 20–
40 hours. It should be cleaned and lubricated more
often if the ATV is operated in extremely dusty ar-
eas. Each time the air filter element maintenance
is performed, check the air inlet of the air filter casefor obstructions.N O T I C E Make sure that the air filter element is prop-
erly seated in the air filter case.Never operate the engine with the air filter el- ement removed. This will allow unfiltered air
to enter the engine, causing rapid engine
wear and possible engine damage. Addition-
ally, operation without the air filter element
will affect carburetor jetting with subsequent
poor performance and possible engine over-
heating.
8

10
Engine oil quantity:Periodic oil change: 0.8 L (0.84 US qt) (0.70 Imp.qt)Final transmission oil:Type:SAE80 API GL-4 Hypoid gear oil
Quantity: 0.30 L (0.32 US qt) (0.27 Imp.qt)Air filter:Air filter element: Wet elementFuel:Recommended fuel: Regular unleaded gasoline only (EUR)
Unleaded gasoline only (AUS)(NZL)
Fuel tank capacity: 4.8 L (1.27 US gal) (1.06 lmp.gal)
Fuel reserve amount: 1.0 L (0.26 US gal) (0.22 Imp.gal)Carburetor:Manufacturer:TK
Type x quantity: SVR 22-1G x 1Spark plug (s):Manufacturer/model:NGK/CR7HSA
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)
Chassis:Frame type: Steel tube frame
Caster angle: 4.0 °
Trail: 16 mm (0.63 in)
Front tire:Type:Tubeless
Size: AT18 x 7-8
Manufacturer/model: MAXXIS/M939
Clutch:Clutch type: Dry, centrifugal automatic
Transmission:Primary reduction system: V-belt
Primary reduction ratio:
2.47-0.61:1
Secondary reduction system: Spur
Secondary reduction ratio: 41/15 × 45/13 (9.462)
Third reduction system:
Chain drive
Third reduction ratio: 28/13(2.154)
Transmission type: V-belt automatic
10
10-2

INDEX
AAccessories and loading ................................................ 6-6
Air filter element, cleaning ............................................ 8-15BBattery ........................................................................\
...8-28
Brake lever, front.............................................................4-6Brake lever, rear............................................................4-6
Brake lever free play, checking the rear........................8-26
Brake levers, checking and lubricating .............. .......... 8-27
Brakes, front and rear....................................................5-3
Brake pads, checking the rear.......................................8-25
Brake fluid level, checking the rear...............................8-25
Brake fluid level, changing the rear..............................8-26 Brake lever free play, adjusting the front......................8-23CCables, checking and lubricating ................................. 8-27
Carburetor, adjusting.................................................... 8-20
Chassis fasteners........................................................... 5-7
Cleaning..........................................................................9-1EEngine break-in .............................................................. 6-4
Engine, cold start...........................................................6-1
Engine idling speed ...................................................... 8-20 Engine oil............................................................5-3, 8-11
Engine, starting a warm................................................6-3
Engine stop switch.......................................................4-2
Fuel........................................................................4-8, 5-3
Fuel cock......................................................................4-10
Fuel tank cap..................................................................4-8
Fuse, replacing.............................................................8-30
F
KKey identification number ............................................. 11-1LLabel locations...............................................................2-1HHandlebar switches ........................................................ 4-2IIdentification numbers .................................................. 11-1
Instruments and switches.............................................5-7MMain switch .................................................................... 4-1
Maintenance and lubrication chart.................................8-5
Maintenance chart, emission control system.................8-3
Model label...................................................................11-2
Choke ............................................................................ 4-11 Brake shoes, checking the front .................................. 8-22
Final transmission oil ........................................... 5-3, 8-14
Engine speed limiter plate............................................ 4-5
Kick starter ................................................................. 4-12