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5-13 
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EL 
EBU00485 
Engine oil 
Make sure the engine oil is at the specified lev-
el. Fill with oil as necessary. (See pages 8-15 ~
8-23 for details.)
Temp.
-20°
-10°0°10°20°30°40°
50°C
5W/30
10W/30
10W/40
20W/50
15W/4020W/40
 
Recommended oil:
Recommended engine oil classification:
API Service SE, SF, SG type or higher 
     
        
        Page 249 of 370

 
8-8 
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ER 
* It is recommended that these items be serviced by a Yamaha dealer.
** Lithium-soap-based grease
NOTE:
 
Brake fluid replacement:
1. When disassembling the master cylinder or caliper cylinder, replace the brake fluid. Normally
check the brake fluid level and add fluid as required.
2. On the inner parts of the master cylinder and caliper cylinder, replace the oil seals every two
years. 
3. Replace the brake hoses every four years, or if cracked or damaged. 
Wheel bearings* 
• Check bearing assembly for looseness/damage.
• Replace if damaged. 
Steering system* 
• Check operation.
• Repair if damaged.
• Check toe-in.
• Adjust if necessary. 
Upper and lower arm 
pivot and steering 
shaft* 
• Lubricate every 6 months.** 
Rear arm pivot* 
• Lubricate every 6 months.** 
Fittings and Fasteners* 
• Check all chassis fittings and fasteners.
• Correct if necessary. 
Battery* 
• Check specific gravity.
• Check breather hose for proper operation.
• Correct if necessary. 
ITEM ROUTINEINITIAL EVERY
1
month3 
months6 
months6 
months1
year 
     
        
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Yuki_Data:Yuki_data:Yuki:Yuki_1:ATV:HM00B067_YFM350X-60:YFM350-SPEC-E.frame 
10-2 
ER 
1
111111191011
 
Engine oil:
Type
-20°
-10°0°10°20°30°40°
50°C
5W/30
10W/30
10W/40
20W/5020W/4015W/40
 
Recommended engine oil classification: API Service SE, SF, SG type or higherMODEL YFM350X
CAUTION
:
Be sure to use motor oils that do not contain anti-
friction modifiers. Passenger car motor oils (often
labeled “Energy Conserving”) contain anti-friction
additives which will cause clutch and/or starter
clutch slippage, resulting in reduced componentlife and poor engine performance.