Yamaha WR450F 2021, Owner'S Service Manual, Page: 91 / 402

PERIODIC MAINTENANCE
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PERIODIC MAINTENANCE
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INTRODUCTION
This chapter includes all information necessary to perform recommended checks and adjustments. If
followed, these preventive maintenance procedures will ensure more reliable vehicle operation, a lon-
ger service life and reduce the need for costly overhaul work. This information applies to vehicles al-
ready in service as well as to new vehicles that are being prepared for sale. All service technicians
should be familiar with this entire chapter.
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PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM
TIP
•
From 4200 mi (7000 km) or 9 months, repeat the maintenance intervals starting from 1800 mi (3000
km) or 3 months.
•
Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools,
data and technical skills.
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GENERAL MAINTENANCE AND LUBRICATION CHART
No. Item Checks and maintenance jobs
Initial Odometer readings
600 mi
(1000 km) or
1 month
1800 mi
(3000 km) or
3 months
3000 mi
(5000 km) or
6 months
1
*
Fuel line
• Check fuel hoses for cracks or damage.
• Replace if necessary.
  
2 Spark plug
• Check condition.
• Adjust gap and clean.
  
3
*
Valve clearance
•
Check and adjust valve clearance when engine is
cold.
 
4 * Air filter element
•
Clean with solvent and apply Yamaha foam air filter
oil or other quality foam air filter oil.
•
Replace if necessary.
  
5
*
Breather system
• Check ventilation hose for cracks or damage and
drain any deposits.
  
6 * Fuel injection • Adjust engine idling speed.   
7 Exhaust system
•
Check for leakage.
• Tighten if necessary.
•
Replace gasket(s) if necessary.
  
8 Engine oil • Change (warm engine before draining).   
9
Engine oil filter ele-
ment
•
Replace.
  
10 Engine oil strainer •
Clean.
  
No. Item Checks and maintenance jobs
Initial Odometer readings
600 mi
(1000 km) or
1 month
1800 mi
(3000 km) or
3 months
3000 mi
(5000 km) or
6 months
1 Clutch
•
Check operation.
•
Adjust or replace cable.
  
2
*
Cooling system
•
Check hoses for cracks of damage.
•
Replace if necessary.
  
•
Replace with ethylene glycol anti-freeze coolant
every 1 year.
Every 1 year
3
*
Spark arrester •
Clean.
